CN210774492U - Underwater dynamic pressure testing system - Google Patents
Underwater dynamic pressure testing system Download PDFInfo
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- CN210774492U CN210774492U CN201922154842.3U CN201922154842U CN210774492U CN 210774492 U CN210774492 U CN 210774492U CN 201922154842 U CN201922154842 U CN 201922154842U CN 210774492 U CN210774492 U CN 210774492U
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- data acquisition
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- acquisition card
- dynamic pressure
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Abstract
The utility model relates to a pressure test technical field, in particular to aquatic developments pressure test system, a plurality of thin film pressure sensor attach on each position to be tested of aquatic test object, thin film pressure sensor passes through the wire and connects in data acquisition card, data acquisition card passes through GPIB-USB and connects in the industrial control computer, be provided with winding device between thin film pressure sensor and the data acquisition card, the wire is around locating winding device, thin film pressure sensor includes elastic stainless steel diaphragm, one side of elastic stainless steel diaphragm is provided with the atress unit, the opposite side is provided with the test bridge circuit, through a plurality of connection pin connections between atress unit and the test bridge circuit. Compared with the prior art, the utility model discloses an aquatic developments pressure test system adopts film pressure sensor, hugs closely the measured object surface, and the sensor volume can neglect, has reduced the pressure distribution influence of sensor overall dimension to the measured object, and the test result is more accurate.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a pressure test technical field, in particular to aquatic developments pressure test system.
[ background of the invention ]
In order to provide data support for the shape optimization design of an underwater operation object, pressure distribution on each position of an underwater moving object needs to be tested on line generally, and an underwater motion testing system in the prior art generally has a large pressure sensor size, influences the shape layout of a tested object, causes inaccurate actual testing pressure of a testing position, has long testing response time, and cannot capture slight pressure change.
[ Utility model ] content
In order to overcome the above problems, the utility model provides an aquatic developments pressure test system that can effectively solve above-mentioned problem.
The utility model provides a technical scheme who above-mentioned technical problem provided is: the system comprises a plurality of film pressure sensors, a data acquisition card and an industrial personal computer, wherein the film pressure sensors are attached to positions to be tested of an underwater test object, the film pressure sensors are connected to the data acquisition card through wires, the data acquisition card is connected to the industrial personal computer through a GPIB-USB, a winding device is arranged between the film pressure sensors and the data acquisition card, the wires are wound on the winding device, each film pressure sensor comprises an elastic stainless steel diaphragm, a stress unit is arranged on one side of each elastic stainless steel diaphragm, a test bridge circuit is arranged on the other side of each elastic stainless steel diaphragm, and the stress unit is connected with the test bridge circuit through a plurality of connecting leads.
Preferably, the test bridge circuit comprises four sensitive resistors, and the four sensitive resistors form a bridge circuit on the elastic stainless steel film by a sputtering process.
Preferably, the thin film pressure sensor further comprises a conversion circuit electrically connected to the test bridge.
Preferably, the conversion circuit comprises a voltage regulator and an amplifying circuit, and the voltage regulator and the amplifying circuit are respectively connected to the test bridge circuit.
Preferably, the data acquisition card is a high-precision data acquisition card and comprises eight synchronous signal acquisition channels.
Preferably, the voltage range of the acquisition channel is-10V to + 10V.
Preferably, the sampling rate of the acquisition channels is 1Ksps-128 Ksps.
Preferably, the acquisition channel samples the noise peak to peak value of 0.00004V at a sampling rate of 1 Ksps.
Preferably, said data acquisition card further comprises a 191K FIFO buffer.
Compared with the prior art, the underwater dynamic pressure test system adopts the film pressure sensor, the film pressure sensor is tightly attached to the surface of the measured object, the volume of the sensor can be ignored, the influence of the overall dimension of the sensor on the pressure distribution of the measured object is reduced, and the test result is more accurate; the data acquisition card is a high-precision data acquisition card, can capture millisecond-level pressure disturbance, and solves the problem of difficult capture of transient pressure parameter acquisition of an underwater high-speed running object; the data acquisition card with multiple channels, high sampling rate, low noise and synchronous sampling can meet the requirements of most signal acquisition projects in scientific research and production.
[ description of the drawings ]
FIG. 1 is a block diagram of the structure of the system for testing dynamic pressure in water according to the present invention;
fig. 2 is the structure diagram of the film pressure sensor of the dynamic pressure testing system in water of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It should be noted that all directional indications (such as up, down, left, right, front, and back … …) in the embodiments of the present invention are limited to relative positions on a given view, not absolute positions.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Referring to fig. 1 and 2, the system for testing dynamic pressure in water according to the present invention includes a plurality of thin film pressure sensors, a data acquisition card and an industrial computer, wherein the thin film pressure sensors are attached to the positions to be tested of the object to be tested in water, the thin film pressure sensors are connected to the data acquisition card through wires, and the data acquisition card is connected to the industrial computer through a GPIB-USB.
A winding device is arranged between the film pressure sensor and the data acquisition card, and the wires are wound on the winding device, so that the wires can be kept to be arranged neatly.
The film pressure sensor comprises an elastic stainless steel diaphragm, one side of the elastic stainless steel diaphragm is provided with a stress unit 10, the other side of the elastic stainless steel diaphragm is provided with a test bridge circuit 20, and the stress unit 10 and the test bridge circuit 20 are connected through a plurality of connecting leads 30. The test bridge circuit 20 comprises four sensitive resistors 21, and the four sensitive resistors 21 form a bridge consisting of the four sensitive resistors 21 on the elastic stainless steel film by adopting a sputtering process.
The thin film pressure sensor also includes a conversion circuit electrically connected to the test bridge 20. The conversion circuit comprises a voltage stabilizer and an amplifying circuit, the voltage stabilizer and the amplifying circuit are respectively connected to the testing bridge circuit 20, the voltage stabilizer is used for providing constant excitation voltage for the testing bridge circuit 20, and the output voltage of the testing bridge circuit 20 is amplified by the amplifying circuit to realize normalized output of 0-5V.
The data acquisition card is a high-precision data acquisition card and comprises eight synchronous signal acquisition channels. The voltage range of the acquisition channel is-10V to + 10V. The sampling rate of the acquisition channel is 1Ksps-128Ksps, and the real-time transmission to an industrial personal computer for display and analysis can be ensured. The noise peak value of the acquisition channel is 0.00004V under the sampling rate of 1 Ksps. The signal-to-noise ratio of the full-scale signal of the acquisition channel is 50 ten thousand.
The data acquisition card also comprises a 191K super-large FIFO buffer, so that data loss can be prevented to the maximum extent, and the integrity of signal acquisition is ensured.
The industrial personal computer can be connected with 10 sets of data acquisition cards simultaneously by expanding the USB interface, thereby expanding the number of channels of the system.
The test principle is as follows: when an object to be detected moves underwater, water resistance acts on the surface of the object, pressure gradients are distributed nonlinearly according to the shape of the surface, a thin film pressure sensor can convert the distributed pressure into a 0-5V voltage signal, the voltage signal is converted into a digital signal through a high-precision data acquisition card A/D and the data is uploaded to an industrial personal computer through a GPIB-USB, and analysis software in the industrial personal computer records and stores the motion parameters such as the maximum pressure, the minimum pressure and the like of the underwater moving object in real time according to the position of an acquisition channel.
Compared with the prior art, the underwater dynamic pressure test system adopts the film pressure sensor, the film pressure sensor is tightly attached to the surface of the measured object, the volume of the sensor can be ignored, the influence of the overall dimension of the sensor on the pressure distribution of the measured object is reduced, and the test result is more accurate; the data acquisition card is a high-precision data acquisition card, can capture millisecond-level pressure disturbance, and solves the problem of difficult capture of transient pressure parameter acquisition of an underwater high-speed running object; the data acquisition card with multiple channels, high sampling rate, low noise and synchronous sampling can meet the requirements of most signal acquisition projects in scientific research and production.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications made within the spirit of the present invention, equivalent replacements and improvements should be included in the scope of the present invention.
Claims (9)
1. The underwater dynamic pressure test system is characterized by comprising a plurality of film pressure sensors, a data acquisition card and an industrial personal computer, wherein the film pressure sensors are attached to each position to be tested of an underwater test object, the film pressure sensors are connected to the data acquisition card through a lead, and the data acquisition card is connected to the industrial personal computer through a GPIB-USB;
a winding device is arranged between the film pressure sensor and the data acquisition card, and a lead is wound on the winding device;
the film pressure sensor comprises an elastic stainless steel diaphragm, a stress unit is arranged on one side of the elastic stainless steel diaphragm, a test bridge circuit is arranged on the other side of the elastic stainless steel diaphragm, and the stress unit is connected with the test bridge circuit through a plurality of connecting leads.
2. The system for underwater dynamic pressure testing of claim 1 wherein the test bridge includes four sensing resistors, the four sensing resistors being sputtered to form a bridge over the flexible stainless steel diaphragm.
3. The aquatic dynamic pressure testing system of claim 1, wherein the membrane pressure sensor further comprises a conversion circuit, the conversion circuit being electrically connected to the test bridge.
4. The system for underwater dynamic pressure testing of claim 3 wherein the conversion circuit includes a voltage regulator and an amplification circuit, the voltage regulator and the amplification circuit being respectively connected to the test bridge.
5. The system for testing dynamic pressure in water according to claim 1, wherein the data acquisition card is a high-precision data acquisition card comprising eight synchronous signal acquisition channels.
6. The system for underwater dynamic pressure testing of claim 5 wherein the voltage of the collection channel ranges from-10V to + 10V.
7. The aquatic dynamic pressure testing system of claim 5, wherein the sampling rate of the acquisition channel is from 1Ksps to 128 Ksps.
8. The aquatic dynamic pressure testing system of claim 7, wherein the acquisition channel samples the noise peak-to-peak value of 0.00004V at a sampling rate of 1 Ksps.
9. The system according to claim 1, wherein said data acquisition card further comprises a 191K FIFO buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922154842.3U CN210774492U (en) | 2019-12-04 | 2019-12-04 | Underwater dynamic pressure testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922154842.3U CN210774492U (en) | 2019-12-04 | 2019-12-04 | Underwater dynamic pressure testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210774492U true CN210774492U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922154842.3U Active CN210774492U (en) | 2019-12-04 | 2019-12-04 | Underwater dynamic pressure testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210774492U (en) |
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2019
- 2019-12-04 CN CN201922154842.3U patent/CN210774492U/en active Active
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