High-frequency transmitting transducer capable of measuring internal temperature in real time

Abstract

The utility model relates to a high-frequency transmitting transducer capable of measuring internal temperature in real time. The high-frequency transmitting transducer comprises a ceramic shell platinum resistor and a longitudinal oscillator, the ceramic shell platinum resistor is arranged at the central position of the high-frequency transmitting transducer planar array, the whole longitudinal vibrator is trumpet-shaped, and the center of a gap space between trumpets is also the central position of the high-frequency transmitting transducer; the number of the ceramic shell platinum resistors is one, specifically, the ceramic shell platinum resistors are arranged behind the front cover plate at one end of the longitudinal vibrator in the center position and in the gap between the piezoelectric ceramics, epoxy resin or 2401 instant adhesive is used for fixing every two ceramic shell platinum resistors, and the other end of the piezoelectric ceramics is further provided with a rear cover plate. According to the high-frequency transmitting transducer, the ceramic shell platinum resistor is placed in the gap between the longitudinal vibrators without changing the original structure of the transducer, and the internal temperature of the transducer is tested in real time by leading the internal core wire of the watertight cable of the transducer to the dry end.

Description

Technical Field

[0001] This utility model relates to the field of underwater acoustic transducer technology, and in particular to a high-frequency transmitting transducer that can measure internal temperature in real time. Background Technology

[0002] Underwater acoustic transducers are indispensable components of sonar, responsible for generating and receiving acoustic signals. They primarily convert between electrical and acoustic energy. Transmitting transducers convert electrical energy into acoustic energy, but this conversion is incomplete. Typically, the electroacoustic conversion efficiency of transducers is between 20% and 60%, with the remaining energy largely converted into internal energy. When transmitting via continuous wave, the internal energy accumulates rapidly, causing a continuous rise in the transducer's internal temperature.

[0003] The longitudinal vibrator, due to its advantages of simple structure, mature technology, high reliability, and stable performance, is often used as the transmitting element of high-frequency transmitting transducers. The longitudinal vibrator is composed of piezoelectric ceramics, front and rear cover plates, and prestressed screws. Usually, the piezoelectric ceramics are bonded to the front and rear cover plates with adhesive. The increase in internal temperature of the transducer will cause the performance of the piezoelectric ceramics to deteriorate. After exceeding the Curie point, the piezoelectric ceramics will lose their piezoelectric properties, that is, the transducer will fail. At the same time, the increase in temperature will also cause the performance of the adhesive and sealing sound-permeable material to deteriorate, affecting the reliability of the transducer. The continuous rise in internal temperature of the transducer can easily cause the transducer to fail.

[0004] Therefore, a high-frequency transmitting transducer that can measure the internal temperature in real time is needed. By monitoring the temperature changes inside the transducer, the performance of the transducer can be evaluated, and transducer failure due to excessive temperature can be avoided. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a high-frequency transmitting transducer capable of real-time measurement of internal temperature, including a ceramic shell platinum resistance thermometer and a longitudinal oscillator; the ceramic shell platinum resistance thermometer is located at the center of the high-frequency transmitting transducer planar array, and the longitudinal oscillator is generally horn-shaped, with the center of the gap between the horn shapes also being the center of the high-frequency transmitting transducer; and the ceramic shell platinum resistance thermometer is provided, specifically located behind the front cover plate at one end of the longitudinal oscillator at the center position and in the gap between the piezoelectric ceramics, and the two are fixed together using epoxy resin or 2401 quick-drying adhesive, wherein the other end of the piezoelectric ceramics is also provided with a rear cover plate;

[0006] The lead wire end on one side of the platinum resistance thermometer is led out to a matching cable head by welding with the watertight cable wire.

[0007] In one embodiment of this utility model, the longitudinal vibrator is placed inside the housing of the high-frequency transmitting transducer along with a base. The housing is made of corrosion-resistant stainless steel or titanium alloy and is integrally processed. The base is made of insulating hard material and is an integral cuboid. The width dimension is equal to the center distance of the longitudinal vibrator. It is designed with grooves and holes that match the size of the longitudinal vibrator for installation and fixation.

[0008] In one embodiment of this utility model, stress grooves are provided at both ends of the outer shell to increase the bonding area and increase the bonding force, and a watertight potting layer is provided in the stress groove.

[0009] In one embodiment of this utility model, longitudinal oscillators are uniformly distributed and fixed on the base along the length direction to form a complete linear array module, and the two are bonded and fixed with epoxy resin; the front cover plate at one end of the longitudinal oscillator is trumpet-shaped, that is, the oscillator has a large radiation area. When the other piezoelectric ceramics are densely arranged with the rear cover plate and the front cover plate, there are gaps between the ceramic elements. These gaps are filled by injecting and curing a decoupling material, which is a porous material added to polyurethane.

[0010] Compared with the prior art, the above-mentioned technical solution of this utility model has the following advantages: The high-frequency transmitting transducer of this utility model places a ceramic shell platinum resistance in the gap between the longitudinal oscillators without changing the original structure of the transducer. The internal temperature of the transducer is tested in real time by leading out the core wire inside the transducer watertight cable to the dry end. Its structure is simple, low cost, and reliable process, and it can avoid transducer failure caused by unknown high temperature. Attached Figure Description

[0011] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0012] Figure 1 This is a schematic diagram of the high-frequency transmitting transducer of this utility model that can measure internal temperature in real time;

[0013] Figure 2 This is a schematic diagram of the placement of the ceramic shell platinum resistance thermometer described in this utility model;

[0014] Figure 3 This is a schematic diagram of a single longitudinal oscillator structure of this utility model.

[0015] As shown in the figure, 1. Outer shell, 2. Longitudinal oscillator, 3. Ceramic shell platinum resistance thermometer, 4. Base, 5. Watertight cable, 6. Decoupling material, 7. Watertight potting layer, 8. Front cover plate, 9. Piezoelectric ceramic, 10. Rear cover plate. Detailed Implementation

[0016] like Figure 1 and Figure 2 As shown, this embodiment provides a high-frequency transmitting transducer capable of real-time measurement of internal temperature, including a ceramic shell platinum resistance 3 and a longitudinal vibrator 2; the ceramic shell platinum resistance 3 is located at the center of the high-frequency transmitting transducer's planar array, and the longitudinal vibrator 2 is generally horn-shaped, with the center of the gap between the horn shapes also being the center of the high-frequency transmitting transducer; and the ceramic shell platinum resistance 3 is provided in one position, specifically located behind the front cover plate 8 at one end of the longitudinal vibrator 2 at the center position and in the gap between the piezoelectric ceramic 9, and the two are fixed together using epoxy resin or 2401 quick-drying adhesive, wherein the other end of the piezoelectric ceramic 9 is also provided with a rear cover plate 10;

[0017] The lead wire end on one side of the platinum resistance thermometer is led out to a matching cable head by welding with the lead wire of the watertight cable 5.

[0018] The longitudinal vibrator 2 is placed inside the housing 1 of the high-frequency transmitting transducer along with the base 4. The housing 1 is made of corrosion-resistant stainless steel or titanium alloy. The base 4 is made of insulating rigid material and is a cuboid. Its width dimension is equal to the center distance of the longitudinal vibrator 2. It is designed with grooves and holes that match the size of the longitudinal vibrator 2 for installation and fixation. Stress grooves are provided at both ends of the housing 1 to increase the bonding area and increase the bonding force. At the same time, a watertight potting layer 7 is provided in the stress groove.

[0019] Specifically, the longitudinal oscillators 2 are evenly distributed and fixed to the base 4 along the length direction, forming a complete linear array module, and the two are bonded together with epoxy resin; the front cover plate 8 at one end of the longitudinal oscillator 2 is trumpet-shaped, that is, the oscillator has a large radiation area, such as... Figure 3 When the piezoelectric ceramics 9, the rear cover plate 10, and the front cover plate 8 are densely arranged in an array, there are gaps between the ceramic elements. These gaps are filled by injecting and curing a decoupling material 6, which is a porous material added to polyurethane.

[0020] Meanwhile, the high-frequency transmitting transducer in this embodiment includes the following steps in its manufacturing process:

[0021] 1. Use epoxy resin to bond and fix the longitudinal oscillator 2 to the base 4, and use wires to lead out the positive and negative poles respectively, forming a linear array module.

[0022] 2. Arrange the modules closely along the width direction, place the ceramic shell platinum resistance 3 in the gap between the piezoelectric ceramics 9 behind the longitudinal oscillator front cover plate 8 at the center position, and fix the modules to each other and the modules to the platinum resistance using epoxy resin or 2401 quick-drying glue.

[0023] 3. Install the entire module into the housing 1 and fix it with epoxy resin or 2401 quick-drying glue. Solder the module and platinum resistance wires to the watertight cable 5 wires and lead them out.

[0024] 4. After adding porous material to polyurethane to form decoupling material 6, it is poured into the gap of longitudinal vibrator 2. The entire pouring should be lower than the radiation surface. After curing, watertight material is used to fill and seal the radiation surface of the transducer and the watertight cable 5.

[0025] 5. Calibrate the resistance at both ends of the platinum resistance lead wire. When the transducer is emitting, the real-time internal temperature of the transducer can be calculated by measuring the resistance at both ends of the platinum resistance lead wire.

[0026] The high-frequency transmitting transducer described in this embodiment, without affecting the acoustic performance of the transducer or changing the original structure, places a ceramic shell platinum resistance 3 in the gap between the longitudinal oscillators 2, and leads the internal core wire of the transducer to the dry end to test the internal temperature of the transducer in real time. The structure is simple, the cost is low, the process is reliable, and it can avoid transducer failure caused by unknown high temperature.

[0027] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A high-frequency transmitting transducer capable of real-time measurement of internal temperature, characterized in that, The device includes a ceramic-cased platinum resistance thermometer (3) and a longitudinal vibrator (2). The ceramic-cased platinum resistance thermometer (3) is located at the center of the high-frequency transmitting transducer array. The longitudinal vibrator (2) is shaped like a horn, and the center of the gap between the horn shapes is also the center of the high-frequency transmitting transducer. The ceramic-cased platinum resistance thermometer (3) is located at the center of the longitudinal vibrator (2) behind the front cover plate (8) and in the gap between the piezoelectric ceramic (9). The two are fixed together using epoxy resin or 2401 quick-drying glue. The other end of the piezoelectric ceramic (9) is also provided with a rear cover plate (10). The lead end on one side of the platinum resistance is led out to a matching cable head by welding with the lead of the watertight cable (5).

2. The high-frequency transmitting transducer according to claim 1, characterized in that: The longitudinal oscillator (2) is placed inside the housing (1) of the high-frequency transmitting transducer together with the base (4).

3. The high-frequency transmitting transducer according to claim 2, characterized in that: Furthermore, stress grooves are provided at both ends of the outer shell (1), and a watertight potting layer (7) is provided inside the stress grooves.

4. The high-frequency transmitting transducer according to claim 2, characterized in that: The longitudinal oscillator (2) is evenly distributed and fixed on the base (4) along the length direction to form a complete linear array module, and the two are fixed by epoxy resin. The front cover plate (8) at one end of the longitudinal oscillator (2) is horn-shaped, that is, the oscillator has a large radiation area. When the other piezoelectric ceramics (9) and the rear cover plate (10) and the front cover plate (8) are densely arranged in an array, there are gaps between the ceramic elements. The decoupling material (6) is used to fill and cure the gaps.

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