CN216349413U

CN216349413U - GEEBLA multifunctional digital display acoustic wave sensor

Info

Publication number: CN216349413U
Application number: CN202121799511.6U
Authority: CN
Inventors: 陈小海; 张跃; 葛伟
Original assignee: Nanjing Green Energy Electric Equipment Co ltd
Current assignee: Nanjing Green Energy Electric Equipment Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-04-19
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a GEEBLA multifunctional digital display acoustic wave sensor which comprises a shell and a base, wherein a processing mainboard is arranged in the shell, a liquid crystal sensor assembly is arranged on the processing mainboard, and a liquid crystal display screen of the liquid crystal sensor assembly is arranged on a front end cover of the shell; a buzzer and an electret microphone are arranged in the base. The sensor provided by the utility model has the advantages of simple structure, complete functions, convenience in maintenance, good stability and convenience in installation; meanwhile, a high-performance integrated circuit is adopted, so that the detection precision of the sensor is greatly improved; in addition, this sensor signal is for exchanging 10 ~ 180mA, adopts the anti-interference filtering technique, carries out filtering treatment to low-frequency interference signal, can handle 0.2 ~ 20 KHZ's frequency channel, handles the frequency channel extensively, has the digital display function and can include temperature display, working power supply demonstration, output current shows, fault alarm shows, leakage state shows, and the panel can operate single channel self-checking test, use stainless steel clamp pedestal mounting, simple to operate, anticorrosion.

Description

GEEBLA multifunctional digital display acoustic wave sensor

Technical Field

The utility model relates to a sensor, in particular to a GEEBLA multifunctional digital display acoustic wave sensor.

Background

When the boiler of the power plant operates, the boiler pressure-bearing pipeline not only influences the safe operation of the generator set once leaking, but also threatens the personal safety of workers. Therefore, the prevention of the boiler tube leakage and the early detection of the leakage are very important, and the method is usually realized by adopting an acoustic sensor which receives an audio signal in a hearth; when the boiler normally works, the received signal is background noise, the frequency of the background noise is mainly concentrated in a low-frequency band, and the sound intensity is weak; when the boiler tube leaks, the noise intensity of the hearth is obviously enhanced by the leaked sound, the frequency of the leaked sound is mainly concentrated in a middle and high frequency range, and the sensor can sensitively convert the intensity, frequency spectrum and other real conditions of the noise in the boiler tube into current signals and transmit the current signals to the monitoring system. However, the existing acoustic wave sensors are all designed in a sealed mode, a display panel is not available, data and operation cannot be checked on site, and the functions are single; the existing sensors are installed by threads, cannot adapt to industrial environment, are difficult to disassemble after being corroded, do not have display components and do not have the function of digital display of temperature, working voltage and output current.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims to provide a GEEBLA multifunctional digital display acoustic wave sensor.

The technical scheme is as follows: the GEEBLA multifunctional digital display acoustic wave sensor comprises a shell and a base, wherein a processing mainboard is arranged in the shell, a liquid crystal sensor assembly is arranged on the processing mainboard, and a liquid crystal display screen of the liquid crystal sensor assembly is arranged on a front end cover of the shell; a buzzer and an electret microphone are arranged in the base. The processing main board is a GEEBLA-DS printed board.

Further, the shell and the base adopt stainless steel hoop installation interfaces.

Furthermore, the GEEBLA-DS printed board comprises a voltage division circuit, an analog pre-amplification circuit, an A/D conversion circuit, an MCU circuit, an OLED display circuit, a sensor circuit, a signal amplification conditioning circuit and a voltage/current conversion circuit.

Further, the voltage division circuit mainly comprises a resistor R1 and a resistor R2, wherein the resistance value of R1 is 18K, and the resistance value of R2 is 1.2K.

Furthermore, the A/D conversion circuit meets the Shannon standard, the frequency of the leakage sound signal is below 20KHz, and the A/D conversion sampling speed is 40-200 KSPS.

Furthermore, the sensor circuit is composed of a negative temperature thermistor, an electret microphone and a self-checking buzzer.

Further, the negative temperature coefficient thermistor is mounted close to the front end of the sensor.

Furthermore, the frequency response range of the electret microphone is 0.2-20 KHz.

Furthermore, the OLED display circuit displays the input power supply voltage of the sensor, the output signal current value of the sensor and the working environment temperature of the sensor, and simultaneously expands and displays the continuous working time, company information and product model of the sensor; the resolution of the OLED display circuit is 128 x 64 to 56 x 64.

Has the advantages that: compared with the prior art, the utility model has the following remarkable advantages: the GEEBLA multifunctional digital display acoustic wave sensor provided by the utility model has the advantages of simple structure, complete functions, convenience in maintenance, good stability and convenience in installation; meanwhile, a high-performance integrated circuit is adopted, so that the detection precision of the sensor is greatly improved; in addition, this sensor signal is for exchanging 10 ~ 180mA, adopts the anti-interference filtering technique, carries out filtering treatment to low-frequency interference signal, can handle 0.2 ~ 20 KHZ's frequency channel, handles the frequency channel extensively, has the digital display function and can include temperature display, working power supply demonstration, output current display, malfunction alerting show, state display, and the panel can operate single channel self-checking test, use stainless steel clamp pedestal mounting, simple to operate, anticorrosion.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a circuit diagram of a processing motherboard.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings.

As shown in fig. 1, the GEEBLA multifunctional digital display acoustic wave sensor of the utility model comprises a shell 1, a front end cover 2, a rear end cover 3, a nameplate 24, a stainless steel base 4 and a base upper end 5, wherein a base upper end sealing ring 19, a front cover sealing ring 20 and a rear cover sealing ring 21 ensure the integral sealing performance of the sensor, a buzzer 13 and an electret microphone 14 are arranged in a rubber shell 6 in the base 4, a steel wire mesh sheet 16 is fixed at the front end by a steel clamp spring 17 for dust prevention of components, and a high temperature resistant film sheet 15 and a base sealing ring 18 are coated for water prevention of the base. The sensor liquid crystal display component 7 is installed in the shell and connected with the buzzer 13 and the electret microphone 14 through a CH2.5 four-core plug 11, an external cable 22 is connected into the quick plug 10 through a threading pipe joint 23 and connected with the socket 9 on the printed board 8, and then connected with the sensor liquid crystal display component 7 through a CH2.5 five-core plug 12.

As shown in fig. 2, the main board circuit includes a voltage dividing circuit 25, an analog pre-amplification circuit 26, an a/D conversion circuit 27, an MCU circuit 28, an OLED display circuit 29, a sensor circuit 30, a signal amplification conditioning circuit 31, and a voltage/current conversion circuit 32. The voltage division circuit mainly comprises a resistor R1251 and a resistor R2252, wherein the resistance of R1 is 18K, and the resistance of R2 is 1.2K. The sensor circuit 30 is composed of a negative temperature thermistor 301, an electret microphone 302, and a self-test buzzer 303.

Claims

1. A GEEBLA multifunctional digital display acoustic wave sensor is characterized by comprising a shell and a base, wherein a processing mainboard is arranged in the shell, a liquid crystal sensor assembly is arranged on the processing mainboard, and a liquid crystal display screen of the liquid crystal sensor assembly is arranged on a front end cover of the shell; a buzzer and an electret microphone are arranged in the base, and the processing main board is a GEEBLA-DS printed board.

2. The teella multifunction digital display acoustic wave sensor according to claim 1, wherein said housing and base employ stainless steel clip mounting interfaces.

3. The teella multifunctional digital display acoustic wave sensor according to claim 1, wherein the teeba multifunctional digital display acoustic wave sensor comprises a voltage dividing circuit, an analog pre-amplification circuit, an a/D conversion circuit, an MCU circuit, an OLED display circuit, a sensor circuit, a signal amplification conditioning circuit, and a voltage/current conversion circuit.

4. The GEEBLA multifunctional digital display acoustic wave sensor according to claim 3, wherein the voltage dividing circuit mainly comprises a resistor R1 and a resistor R2, wherein the resistance of R1 is 18K, and the resistance of R2 is 1.2K.

5. The GEEBLA multifunctional digital display acoustic wave sensor according to claim 3, wherein the A/D conversion circuit meets Shannon's criteria, the leakage sound signal frequency is below 20KHz, and the A/D conversion sampling speed is 40-200 KSPS.

6. The GEEBLA multifunctional digital display acoustic wave sensor according to claim 3, wherein the sensor circuit is composed of a negative temperature thermistor, an electret microphone, a self-test buzzer.

7. The GEEBLA multifunctional digital display acoustic wave sensor according to claim 6, wherein the negative temperature coefficient thermistor is mounted close to the sensor front end.

8. The GEEBLA multifunctional digital display acoustic wave sensor according to claim 6, wherein the frequency response range of the electret microphone is 0.2-20 KHz.

9. The GEEBLA multifunctional digital display acoustic wave sensor according to claim 3, wherein the OLED display circuit displays the input power supply voltage of the sensor, the output signal current value of the sensor and the working environment temperature of the sensor, and simultaneously expands and displays the continuous working time, company information and product model of the sensor; the resolution of the OLED display circuit is 128 × 64 to 256 × 64.