CN211425427U - Seawater depth sensor - Google Patents
Seawater depth sensor Download PDFInfo
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- CN211425427U CN211425427U CN202020290135.7U CN202020290135U CN211425427U CN 211425427 U CN211425427 U CN 211425427U CN 202020290135 U CN202020290135 U CN 202020290135U CN 211425427 U CN211425427 U CN 211425427U
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- pressure sensor
- ceramic pressure
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- 239000013535 sea water Substances 0.000 title claims abstract description 44
- 239000000919 ceramic Substances 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000004364 calculation method Methods 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 238000013497 data interchange Methods 0.000 claims abstract description 3
- 230000007797 corrosion Effects 0.000 claims description 27
- 238000005260 corrosion Methods 0.000 claims description 27
- 230000003321 amplification Effects 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a sea water depth sensor, adopt ceramic pressure sensor to apply the pressure of external fluid on ceramic pressure drag diaphragm and turn into corresponding voltage signal, then adopt data acquisition to enlarge the chip and gather and enlarge voltage signal, it filters to enlarging voltage signal to recycle filter circuit, eliminate clutter and interference, voltage signal after data processing conversion chip will filtering turns into the high low level signal who has the I2C agreement that converts into, at last by data calculation and control chip with high low level signal conversion to the sea water degree of depth that corresponds, realize simultaneously with the data interchange of front end equipment. The automatic compensation, the online calibration and the real-time transmission of data can be realized, and the accuracy of a detection result is ensured.
Description
The technical field is as follows:
the utility model belongs to the technical field of equip under water, concretely relates to sea water depth sensor.
Background art:
in the ocean exploration process, the depth information of the underwater equipment needs to be monitored in real time. Depth sensors are sensors that must be carried by the subsea equipment. The traditional seawater depth sensor mostly adopts diffused silicon and metal pressing sheets. As the external conditions such as temperature, humidity and the like and time are accumulated, the reference and linear coefficients of the sensor drift, frequent calibration is needed, and small irreversible changes can occur under long-term pressure. The invention relates to a seawater depth sensor based on a ceramic pressure sensor, which is based on the fact that the ceramic pressure sensor which is traditionally applied to various chemical corrosive liquids cannot be directly applied to seawater depth detection due to the requirements of seawater corrosivity, pressure resistance and the like.
The utility model has the following contents:
the utility model discloses aim at overcomes the shortcoming that prior art exists, seeks to design a sea water depth sensor, has solved the current problem that depth sensor needs frequent calibration under water.
In order to achieve the above object, the present invention relates to a seawater depth sensor, which comprises a seawater corrosion resistant housing, a ceramic pressure sensor, a data acquisition amplifying chip, a filter circuit, a data processing converting chip and a data calculating and controlling chip, wherein the rear end of the seawater corrosion resistant housing is provided with a containing groove, the bottom of the containing groove is provided with a through hole penetrating the front end of the seawater corrosion resistant housing, the ceramic pressure sensor is installed in the containing groove and is used for converting the pressure applied by the external fluid on the ceramic piezoresistive membrane into a corresponding voltage signal, the data acquisition amplifying chip is connected with the ceramic pressure sensor and is used for acquiring and amplifying the voltage signal, the filter circuit is connected with the data acquisition amplifying chip and is used for filtering the amplified voltage signal to eliminate clutter and interference, the data processing converting chip is connected with the filter circuit and converts the filtered voltage signal into a high-low level signal with an I2C protocol, the data calculation and control chip is connected with the data processing conversion chip and used for converting high and low level signals into corresponding seawater depth and realizing data interchange with front-end equipment.
Furthermore, the front end of the seawater corrosion resistant shell is provided with an external thread.
Specifically, the seawater corrosion resistant shell is made of stainless steel.
Specifically, the hollow threaded column is connected with the inner thread of the accommodating groove through an external thread and is fixedly installed on the upper portion of the ceramic pressure sensor.
Specifically, the ceramic pressure sensor, the data acquisition amplifying chip, the filter circuit, the data processing conversion chip and the data calculation and control chip are all arranged in a cavity of the hollow threaded column, and the hollow stud is sealed by glue pouring, so that the pressure resistance of a kilometre level is achieved.
Furthermore, an annular groove is formed in the bottom of the accommodating groove in a winding mode around the through hole, the first corrosion-resistant rubber ring is fixed in the annular groove, and the second corrosion-resistant rubber ring is arranged between the ceramic pressure sensor and the hollow threaded column.
Compared with the prior art, the utility model following beneficial effect has: (1) the high-pressure-resistant seawater corrosion-resistant; (2) the ceramic material is low in price, and the maintenance cost of the depth sensor is low; (3) the automatic compensation, the online calibration and the real-time transmission of data can be realized; (4) the ceramic pressure sensor has good linearity, and the result is more accurate under the condition of data fluctuation.
Description of the drawings:
fig. 1 is a cross-sectional view of a seawater depth sensor according to the present invention.
Fig. 2 is a sectional view of the seawater corrosion resistant casing according to the present invention.
Fig. 3 is a schematic structural diagram of a signal processing part of the seawater depth sensor according to the present invention.
The specific implementation mode is as follows:
the invention is further illustrated by the following specific examples in combination with the accompanying drawings.
Example (b):
the "front end" and "back end" described in this embodiment are based on the usage habit of the seawater depth sensor, and have no other established meaning.
As shown in fig. 1, a seawater depth sensor comprises a seawater corrosion resistant shell 1, a ceramic pressure sensor 2, a data acquisition and amplification chip 3, a filter circuit 4, a data processing and conversion chip 5, a data calculation and control chip 6 and a data transmission line 7, wherein a containing groove 8 is arranged at the rear end part of the seawater corrosion resistant shell, a through hole 9 penetrating through the front end part of the seawater corrosion resistant shell 1 is arranged at the bottom of the containing groove 8, the ceramic pressure sensor 2 is arranged in the containing groove 8 and used for converting the pressure exerted by the external fluid on a ceramic piezoresistive membrane into a corresponding voltage signal, the data acquisition and amplification chip 3 is connected with the ceramic pressure sensor 2 and used for acquiring and amplifying the voltage signal, the filter circuit 4 is connected with the data acquisition and amplification chip 3 and used for filtering the amplified voltage signal and eliminating clutter and interference, the data processing and conversion chip 5 is connected with the filter circuit 4, the filtered voltage signals are converted into high and low level signals with an I2C protocol, the data calculation and control chip 6 is connected with the data processing conversion chip 5 and used for converting the high and low level signals into corresponding seawater depth and receiving control instructions, and the data transmission line 7 is connected with the data calculation and control chip 6 and outputs the detected seawater depth in real time.
Furthermore, the front end of the seawater corrosion resistant shell is provided with an external thread, so that the seawater corrosion resistant shell is conveniently in threaded connection with underwater equipment. In order to further enhance the sealing performance, the threaded connection is sealed by glue filling.
Specifically, 316 stainless steel is adopted as the seawater corrosion resistant shell 1.
Specifically, hollow threaded column 10 passes through external screw thread and 8 internal thread connections of storage tank, and fixed mounting is on ceramic pressure sensor 2 upper portion, fixes ceramic pressure sensor 2. The ceramic pressure sensor 2, the data acquisition and amplification chip 3, the filter circuit 4, the data processing and conversion chip 5 and the data calculation and control chip 6 are all arranged in the cavity of the hollow threaded column 10, and after leading out wires, the hollow stud is sealed by adopting colloid glue pouring with high strength, high corrosion resistance and high sealing performance, so that the pressure resistance of a kilometre level is achieved. An annular groove 11 is arranged at the bottom of the accommodating groove 8 around the through hole 9, a first corrosion-resistant rubber ring 12 is fixed in the annular groove 11, and a second corrosion-resistant rubber ring 13 is arranged between the ceramic pressure sensor 2 and the hollow threaded column 10. The first corrosion-resistant rubber ring 12 and the second corrosion-resistant rubber ring 13 ensure that the ceramic pressure sensor 2 is stressed uniformly, the accuracy of results is ensured, and meanwhile, the sealing performance is also ensured.
The ceramic pressure sensor is directly subjected to tiny voltage and current signal changes by adopting a high-precision and high-sensitivity data acquisition chip for collection and acquisition, high-precision amplification is carried out, and then a filter circuit is adopted for filtering, clutter and interference are eliminated, so that the power stability and the signal accuracy are improved, and impact resistance is realized. The filter circuit is a common circuit formed by a power supply filter capacitor, a signal filter capacitor and a resistor. The voltage and current analog signals passing through the filter circuit are easily interfered in the transmission process, so that the measurement result is inaccurate, and the device is easily impacted by an external interference source to damage the device. And finally, calculating the pressure signal by adopting a data calculation and control chip, converting the pressure signal into a corresponding seawater depth, wherein the chip is provided with programs such as an automatic calibration zero point, a parameter compensation protocol, a transceiving protocol and the like, the seawater depth signal is transmitted to front-end equipment through a data transmission line, a control instruction of the front-end equipment is received at the same time, and the tail end of the data transmission line is provided with plugs at intervals of 2.5 and 4P, so that the data transmission and power supply can be conveniently and reliably connected with other equipment.
Claims (5)
1. A seawater depth sensor is characterized by comprising a seawater corrosion resistant shell, a ceramic pressure sensor, a data acquisition amplification chip, a filter circuit, a data processing conversion chip and a data calculation and control chip, wherein a containing groove is formed in the rear end portion of the seawater corrosion resistant shell, a through hole penetrating through the front end portion of the seawater corrosion resistant shell is formed in the bottom of the containing groove, the ceramic pressure sensor is installed in the containing groove and used for converting pressure exerted on a ceramic piezoresistive diaphragm by external fluid into corresponding voltage signals, the data acquisition amplification chip is connected with the ceramic pressure sensor and used for acquiring and amplifying the voltage signals, the filter circuit is connected with the data acquisition amplification chip and used for filtering the amplified voltage signals and eliminating clutter and interference, the data processing conversion chip is connected with the filter circuit and converts the filtered voltage signals into high and low level signals with an I2C protocol, the data calculation and control chip is connected with the data processing conversion chip and used for converting high and low level signals into corresponding seawater depth and realizing data interchange with front-end equipment.
2. The seawater depth sensor of claim 1, wherein the bottom of the receiving groove is provided with an annular groove around the through hole, the first corrosion-resistant rubber ring is fixed in the annular groove, and the second corrosion-resistant rubber ring is arranged between the ceramic pressure sensor and the hollow threaded column.
3. The seawater depth sensor of claim 1, wherein the seawater corrosion resistant housing is provided with an external thread at the front end, and the seawater corrosion resistant housing is made of stainless steel.
4. The seawater depth sensor of claim 1, wherein the hollow threaded column is fixedly mounted on the upper portion of the ceramic pressure sensor by being connected with the inner thread of the accommodating groove through an external thread.
5. The seawater depth sensor of any one of claims 1 to 4, wherein the ceramic pressure sensor, the data acquisition and amplification chip, the filter circuit, the data processing and conversion chip and the data calculation and control chip are all disposed in a cavity of the hollow threaded column, and the hollow stud is sealed by glue filling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020290135.7U CN211425427U (en) | 2020-03-11 | 2020-03-11 | Seawater depth sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020290135.7U CN211425427U (en) | 2020-03-11 | 2020-03-11 | Seawater depth sensor |
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| Publication Number | Publication Date |
|---|---|
| CN211425427U true CN211425427U (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020290135.7U Active CN211425427U (en) | 2020-03-11 | 2020-03-11 | Seawater depth sensor |
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| Country | Link |
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| CN (1) | CN211425427U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112384025A (en) * | 2020-11-16 | 2021-02-19 | 浙江大学 | Protective device of electronic device and packaging method thereof |
| CN115979297A (en) * | 2022-10-31 | 2023-04-18 | 国家海洋标准计量中心 | Large and medium-sized ocean pressure type depth finder calibration system and calibration method |
-
2020
- 2020-03-11 CN CN202020290135.7U patent/CN211425427U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112384025A (en) * | 2020-11-16 | 2021-02-19 | 浙江大学 | Protective device of electronic device and packaging method thereof |
| CN115979297A (en) * | 2022-10-31 | 2023-04-18 | 国家海洋标准计量中心 | Large and medium-sized ocean pressure type depth finder calibration system and calibration method |
| CN115979297B (en) * | 2022-10-31 | 2024-04-26 | 国家海洋标准计量中心 | Calibration system and calibration method for large and medium ocean pressure type depth sounder |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 106 Keyuan Jingwu Road, Laoshan District, Qingdao City, Shandong Province, 266101 Patentee after: Shandong Qinghai Ecological Environment Research Institute Co.,Ltd. Address before: 266200 Qingdao Blue Silicon Valley Core Area Entrepreneurship Center Phase I - Haichuang Center, Jimo City, Qingdao, Shandong Province Patentee before: Qingdao Luobofei Marine Exploration Equipment Applied Technology Research Institute Co.,Ltd. |
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| CP03 | Change of name, title or address |