CN116950031A - Compensation type sounding probe and marine static sounding equipment using same - Google Patents

Abstract

The application relates to a compensating type sounding probe and a marine static sounding device using the same, comprising: a housing configured as a case having both ends open; the power transmission subassembly sets up in the bottom of shell and seals the opening of shell bottom, and the power transmission subassembly includes: the force transmission column comprises a force-bearing part extending out of the shell and a force-bearing part positioned in the shell, a hollow accommodating cavity is formed in the force-bearing part, and a plurality of water inlets communicated with the accommodating cavity are formed in the force-bearing part; the sensor is arranged in the shell and connected with the force transmission assembly, and comprises a pore pressure sensor and a cone tip sensor; and the oil bag is arranged in the top end of the shell, the inner cavity of the oil bag is communicated with the inner cavity of the shell to form a channel for silicone oil to flow, the outer peripheral wall of the oil bag is in sealing connection with the opening of the top end of the shell, a plurality of through holes which correspond to and are communicated with the side wall of the oil bag are formed in the shell, and the number of the through holes is the same as that of the water inlet holes. The compensating type touch probe can improve the accuracy of the measurement result.

Description

Compensation type sounding probe and marine static sounding equipment using same

Technical Field

The application belongs to the technical field of ocean static sounding, and particularly relates to a compensating type sounding probe and ocean static sounding equipment using the same.

Background

The static sounding is an in-situ test means and an exploration means, and compared with the conventional exploration procedures such as drilling, sampling, indoor test and the like, the method has the advantages of rapidness, accuracy, economy, labor saving and the like, and can meet engineering exploration requirements of vast coastal areas.

The basic principle of static sounding is that a sounding head with a sensor inside is pressed into the soil at uniform speed by using quasi-static force (no or little impact load compared with dynamic sounding), and the penetration resistance of different sizes is input into a recording instrument by the sensor through an electric signal because the hardness of various soil in the stratum is different, and then the engineering geological survey purposes of acquiring the soil layer section, providing shallow foundation bearing capacity, selecting a pile end bearing layer, estimating single pile bearing capacity and the like are realized through qualitative and statistical correlation between the penetration resistance and engineering geological features of the soil.

The marine static cone penetration probe is used for testing cone tip resistance, side friction resistance, pore water pressure and the like in the sediment. At present, the cone tip of the static cone penetration probe tests the total stress of soil and water in a single-end stress mode, and the influence of the sea water pressure is always considered in the measuring range of the probe adopting the structure because the sea water pressure is continuously improved along with the increase of the water depth. When the water depth exceeds 1000m, the hydrostatic pressure born by the probe is larger, the measuring range of the probe needs to be much higher than the strength of the actual test soil body, and the resolution of the probe is reduced; for deep sea shallow sediment, the intensity range is 10kPa-200kPa, but the probe range is up to megapascal because of the large water depth. Meanwhile, due to the existence of the seawater pressure, the pore water pressure also needs to obtain the hyperstatic pressure on the basis of the hydrostatic pressure, which obviously reduces the relative measurement accuracy.

The pressure compensation type touch probe in the prior art comprises a shell, a force transmission component, a sensor and an oil bag, wherein the shell is a shell with two open ends, the force transmission component is positioned at one end of the shell and seals the opening of the shell, and the sensor is positioned in the shell and connected with the force transmission component; the oil bag is arranged at the other end of the shell, and the inner cavity of the oil bag is communicated with the inner cavity of the shell and forms a channel for the flow of the silicone oil. Applicants found in application and testing that: the upper end of the shell is provided with an opening structure, and the static cone penetration test is uniform motion, so that a certain negative pressure is formed at the opening structure due to the suction effect, namely the pressure acting on the oil bag is not equal to the external actual pressure, the opening structure at the upper end of the shell is different from the pressure measuring water inlet in size and position, and the pressure cannot truly compensate the hydrostatic pressure of the water inlet. In addition, the temperature compensation cannot be well realized because the heat generated by friction between different positions and structures of the probe and rock soil further has influence on the water temperature. Therefore, the pressure compensation type sounding probe in the prior art has poor compensation effect, and cannot adapt to the accuracy of the underwater static sounding measurement result.

Disclosure of Invention

In order to solve all or part of the above problems, an object of the present application is to provide a compensating type touch probe for improving accuracy of measurement results.

According to a first aspect of the present application there is provided a compensating feeler probe comprising: a housing configured as a case having both ends open; the power transmission subassembly, its setting just seals the opening of shell bottom in the bottom of shell, and the power transmission subassembly includes: the force transmission column comprises a force-bearing part extending out of the shell and a force-bearing part positioned in the shell, a hollow accommodating cavity is formed in the force-bearing part, and a plurality of water inlets communicated with the accommodating cavity are formed in the force-bearing part; the sensor is arranged in the shell and connected with the force transmission assembly, and comprises a pore pressure sensor and a cone tip sensor, wherein the pore pressure sensor and the cone tip sensor comprise strain bridge type pressure compensation structures; and the oil bag is arranged in the top end of the shell, the inner cavity of the oil bag is communicated with the inner cavity of the shell to form a channel for silicone oil to flow, the outer peripheral wall of the oil bag is in sealing connection with the opening of the top end of the shell, and meanwhile, a plurality of through holes which correspond to and are communicated with the side wall of the oil bag are formed in the shell, and the number of the through holes is the same as that of the water inlet holes.

In some embodiments, the size of the through holes is the same as the water inlet holes.

In some embodiments, the through holes are located up and down to the water inlet holes.

In some embodiments, the sealing sleeve of the outer peripheral wall of the oil bag is provided with a sealing plug, and the sealing plug is in sealing connection with the inner wall of the opening of the shell.

In some embodiments, the cone tip sensor comprises a hollow cylinder, four U-shaped through grooves are uniformly arranged on the cylinder at intervals along the circumferential direction, measuring sheets are formed between every two adjacent U-shaped through grooves, compensating sheets are formed on the inner side of each U-shaped through groove, and the width of each compensating sheet along the circumferential direction is equal to that of each measuring sheet.

In some embodiments, the strain gauge is arranged on the compensation sheet and the measuring sheet, and the two strain gauges which are symmetrical to each other are connected in series to form a strain bridge circuit, and the compensation sheet, the measuring sheet and the strain bridge circuit form a strain bridge type pressure compensation structure.

In some embodiments, the force transfer assembly further comprises: the permeable stone is sleeved on the stress part and covers the inlet of the water inlet; the diaphragm is positioned in the accommodating cavity and covers the outlet of the water inlet hole, and the pore pressure sensor is positioned in the accommodating cavity and is abutted with the diaphragm; and the cone tip is positioned at the end part of the shell and connected with the stress part, and the cone tip sensor is connected with the force transmission part.

In some embodiments, the surface of the force-receiving portion is sleeved with a rubber gasket, the rubber gasket being located between the water permeable stone and the cone tip.

In some embodiments, the shell comprises a base and a sleeve which are connected with each other, a first cavity is arranged in the base, a second cavity is arranged in the sleeve, a communication hole which is communicated with the first cavity and the second cavity is formed in the base, the oil bag is located in the first cavity and comprises an oil seal column and a rubber leather sleeve, the oil seal column is connected to the end part of the communication hole, the rubber leather sleeve is sleeved on the outer peripheral surface of the oil seal column, a central hole of the oil seal column is communicated with the communication hole, and a circulation hole which is communicated with the central hole is formed in the outer peripheral surface of the inside of the rubber leather sleeve.

According to a second aspect of the application, there is also provided a marine static sounding apparatus comprising a compensating sounding probe as described above.

According to the technical scheme, the compensating type touch probe provided by the application seals the opening at the top end of the shell and the oil bag, and meanwhile, the shell is provided with the plurality of through holes which correspond to and are communicated with the side wall of the oil bag, so that external actual pressure directly acts on the oil bag through the through holes. Therefore, the problem of negative pressure generated by the opening at the upper end of the shell can be directly reduced, so that the pressure acting on the oil bag is close to the external actual pressure, and the measurement result of the compensating type touch probe is more accurate.

Drawings

FIG. 1 is a schematic cross-sectional view of a compensating feeler probe according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an oil bag according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a cone tip sensor according to an embodiment of the present application;

fig. 4 is a schematic view of a part of the structure of a compensating type touch probe according to an embodiment of the application.

Detailed Description

For a better understanding of the objects, structures and functions of the present application, a compensating type touch probe according to the present application will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic sectional view of a compensating type feeler probe according to an embodiment of the present application. As shown in fig. 1, the compensating type touch probe includes: a housing 1 configured as a case having both ends open; a force transfer assembly 2 disposed within the bottom end of the housing 1 and sealing the opening in the bottom end of the housing 1, the force transfer assembly 2 comprising: the force transmission column 21 comprises a force receiving part extending out of the shell 1 and a force transmission part positioned in the shell 1, a hollow accommodating cavity is formed in the force transmission part, and a plurality of water inlets 211 communicated with the accommodating cavity are formed in the force receiving part; a sensor 3 disposed within the housing 1 and connected to the force transfer assembly 2, the sensor 3 comprising a bore pressure sensor 313 and a cone tip sensor 323, the bore pressure sensor 313 and the cone tip sensor 323 each comprising a strain bridge pressure compensation structure; and the oil bag 4 is arranged in the top end of the shell 1, the inner cavity of the oil bag 4 is communicated with the inner cavity of the shell 1 and forms a channel for the flow of the silicone oil, the outer peripheral wall of the oil bag 4 is in sealing connection with the opening of the top end of the shell 1, meanwhile, a plurality of through holes 60 which correspond to and are communicated with the side wall of the oil bag 4 are formed in the shell 1, and the number of the through holes 60 is the same as that of the water inlet holes 211.

In some embodiments, the size of the through holes 60 may be the same as the water inlet holes 211.

In some embodiments, the position of the through hole 60 and the water inlet hole 211 may correspond up and down.

In some embodiments, the outer peripheral wall of the oil bag 4 may be provided with a sealing plug 70 in a sealing manner, the sealing plug 70 being in sealing connection with the inner wall of the opening of the housing 1.

Referring to fig. 2, and referring to fig. 1, when the compensating type touch probe according to the embodiment of the application is used, the inner cavity of the oil bag 4 is communicated with the inner cavity of the housing 1 and forms a channel for the flow of the silicone oil, the channel is filled with the silicone oil, when the external pressure is increased, the pressure of the medium entering through the opening can act on the oil bag 4, the oil bag 4 is extruded, the internal pressure of the oil bag is supplemented through the flow of the silicone oil, otherwise, when the external pressure is reduced, the internal pressure of the oil bag is supplemented through the flow of the silicone oil. I.e. by the free flow of the silicone oil, the internal pressure of the housing 1 is ensured to be synchronized with the external pressure.

The opening at the upper end of the shell of the pressure compensation type sounding probe in the prior art is directly communicated with the external environment, and in the using process of the sounding probe, the static sounding test is uniform motion, so that the opening at the top end of the shell can cause a certain negative pressure phenomenon due to the suction effect. Thus, the negative pressure that is formed can lead to: the pressure acting on the oil bag through the opening is not equal to the external actual pressure, the upper end opening of the shell is different from the pressure measuring water inlet hole in size and position, and the pressure cannot truly compensate the hydrostatic pressure of the water inlet hole.

In the application, in combination with the above arrangement, the opening at the top end of the shell 1 is sealed with the oil bag 4, and meanwhile, the shell 1 is provided with a plurality of through holes 60 which correspond to and are communicated with the side wall of the oil bag 4, so that the external actual pressure directly acts on the oil bag 4 through the through holes 60, thus, the problem of negative pressure generated by the opening at the upper end of the shell 1 can be directly reduced, the pressure acting on the oil bag 4 is close to the external actual pressure, and the measurement result of the compensating type touch probe in the embodiment of the application is more accurate.

Referring to fig. 3, in conjunction with fig. 1, in some embodiments, the cone tip sensor 323 may include a hollow cylinder, four U-shaped through slots 321 are uniformly spaced apart along the circumferential direction on the cylinder, measurement plates 322 are formed between adjacent U-shaped through slots 321, a compensating plate 323 is formed on an inner portion of the U-shaped through slots 321, and the width of the compensating plate 323 is equal to the width of the measuring plate 322 along the circumferential direction.

Referring to fig. 4, in conjunction with fig. 1, in some embodiments, the compensating plate 323 and the measuring plate 322 may be provided with strain gauges, and two strain gauges that are symmetrical to each other are connected in series to form a strain bridge circuit, and the compensating plate 323, the measuring plate 322 and the strain bridge circuit form a strain bridge pressure compensating structure.

Referring to fig. 4 in combination with fig. 1, in some embodiments, the force transfer assembly 2 may further comprise: a water permeable stone 22 which is sleeved on the stress part and covers the inlet of the water inlet 211; a diaphragm 23 located in the accommodating chamber and covering the outlet of the water inlet 211, and a pore pressure sensor 313 located in the accommodating chamber and abutting against the diaphragm 23; and a cone tip 24 which is located at an end of the housing 1 and is connected to the force receiving portion, and a cone tip sensor 323 is connected to the force transmitting portion.

Referring to fig. 4 in combination with fig. 1, in some embodiments, the surface of the force-receiving portion may be provided with a rubber gasket 27, and the rubber gasket 27 is located between the water permeable stone 22 and the cone tip 24.

Referring to fig. 2 in combination with fig. 1, in some embodiments, the housing 1 may include a base 11 and a sleeve 12 that are connected to each other, a first chamber 111 is disposed in the base 11, a second chamber 121 is disposed in the sleeve 12, a communication hole 112 that communicates the first chamber 111 and the second chamber 121 is formed in the base 11, the oil bag 4 is located in the first chamber 111, the oil bag 4 includes an oil seal column 41 and a rubber sleeve 42, the oil seal column 41 is connected to an end of the communication hole 112, the rubber sleeve 42 is sleeved on an outer peripheral surface of the oil seal column 41, a central hole 411 of the oil seal column 41 is communicated with the communication hole 112, and a circulation hole 412 that communicates the central hole 411 is disposed on an outer peripheral surface of the oil seal column 41 located inside the rubber sleeve 42.

In connection with the above, in the present application, the main function of the housing 1 is to connect the probe rod with the probe, and to protect the internal components thereof from external factors. In the present application, the housing 1 may be of an integral structure or a split structure. In this embodiment, the casing 1 is a split structure, the casing 1 includes a base 11 and a sleeve 12 that are connected to each other, and a first sealing ring 13 is disposed between the base 11 and the sleeve 12, where the first sealing ring 13 is used to isolate the flow of internal and external liquids.

In the present application, the oil bag 4 is located in the first chamber 111, and the oil bag 4 includes an oil seal column 41 and a rubber boot 42. Specifically, the outer diameter of the rubber boot 42 is the same as the inner diameter of the first chamber 111, and the rubber boot 42 is vertically perforated and sleeved on the oil seal column 41. The outer peripheral surface of the oil seal column 41 inside the rubber leather sheath 42 is provided with external threads, and two ends of the rubber leather sheath 42 are locked and fixed on the oil seal column 41 through nuts 43. One end of the oil seal column 41 is in threaded connection with the communication hole 112, a central hole 411 of the oil seal column 41 is communicated with the communication hole 112, an internal thread is formed in the central hole 411 at the other end of the oil seal column 41, the internal thread is used for being connected with a watertight plug 5, and the watertight plug 5 is used for being connected with a sensor 3 and a data acquisition system to conduct data transmission. The inner cavity of the oil bag 4 is communicated with the inner cavity of the second chamber 121 and filled with silicone oil, and the outer peripheral surface of the oil seal column 41 positioned inside the rubber sleeve 42 is provided with a communication hole 412 communicated with the central hole 411 for free flow of the silicone oil. With this arrangement, when the external pressure rises, the rubber boot 42 is pressed, and the silicone oil enters the second chamber 121 to supplement the internal pressure thereof. Conversely, when the external pressure is reduced, the silicone oil in the second chamber 121 flows out, and the silicone oil freely flows, so that the internal pressure of the housing 1 is synchronous with the external pressure.

In the present application, the force transfer assembly 2 and the sensor 3 are both located in the second chamber 121, the force transfer assembly 2 being adapted to transfer pressure to the sensor 3. Specifically, in the application, the force transmission assembly 2 comprises a force transmission column 21, a permeable stone 22, a diaphragm 23 and a conical tip 24, wherein the force transmission column 21 comprises a force receiving part extending out of the shell 1 and a force transmission part positioned in the shell 1, a containing cavity is formed in the force transmission part, and a water inlet 211 communicated with the containing cavity is formed in the force receiving part; the permeable stone 22 is sleeved on the stress part and covers the inlet of the water inlet 211, the diaphragm 23 is positioned in the accommodating cavity and covers the outlet of the water inlet 211, and the cone tip 24 is positioned at the end part of the shell 1 and connected with the stress part. The second sealing ring 25 arranged between the force transmission column 21 and the sleeve 12 is used for blocking the communication of liquid and dust between the inside and the outside of the probe under low pressure difference, so that the problem of measurement error caused by high friction force generated by the fact that the conventional probe resists seawater entering the probe under high water pressure environment is solved.

In this embodiment, the force receiving portion and the force transmitting portion are integrally formed. The water inlet holes 211 are three, and the three water inlet holes 211 are uniformly distributed at intervals around the axis of the force transmission column 21, namely, the included angle between the adjacent water inlet holes 211 is 120 degrees. In this way, in the application, the number of the plurality of through holes 60 which correspond to and are communicated with the side wall of the oil bag 4 is three on the shell 1, and the through holes 60 are uniformly distributed at intervals around the axis, namely, the included angle between the adjacent through holes 60 is 120 degrees, and the through holes 60 are in one-to-one correspondence with the water inlet holes 211, so that the purpose of truly compensating the hydrostatic pressure of the water inlet holes 211 by the pressure at the upper end of the shell 1 can be realized by arranging the through holes 60.

In the application, the water inlet 211 is communicated with the diaphragm 23, the diaphragm 23 is used for isolating the internal and external liquid circulation and transmitting the external pressure, and the diaphragm 23 has enough elasticity to ensure the uniformity of pressure transmission. A third sealing ring 26 is arranged between the outer surface of the diaphragm 23 and the accommodating cavity of the force transmission column 21 and is used for blocking the circulation of internal and external liquid. The water permeable stone 22 is used for transmitting pore water pressure and isolating sediment particles from entering the force transmission column 21, and the water permeable stone 22 can be made of porous materials processed by metal or nonmetal. The inner diameter of the permeable stone 22 is 0.5mm larger than the outer diameter of the force transmission column 21, so that the permeable stone 22 can move freely up and down; the water permeable stone 22 has the same outer diameter as the sleeve 12. The rubber gasket 27 is sleeved on the surface of the stress part at the lower end of the permeable stone 22, the rubber gasket 27 is positioned between the permeable stone 22 and the cone tip 24, and the rubber gasket 27 provides a space for deformation of the sensor 3. The pore pressure sensor 313 is positioned in the accommodating cavity and is abutted against the diaphragm 23, the permeable stone 22, the force transmission column 21 and the diaphragm 23 are matched, and pore water pressure is transmitted to the pore pressure sensor 313; one end of the cone tip sensor 323 is connected with the force transmission column 21 through a screw, the other end of the cone tip sensor 323 is connected with the base 11 through threads, the cone tip 24 is matched with the force transmission column 21, and the resistance of the cone tip 24 is transmitted to the cone tip sensor 323. The force-transmitting column 21 thus serves not only for transmitting force, but also as a carrier for the bore pressure sensor 313.

In the application, the plane included angle of the conical tip 24 is 60 degrees, the diameter of the bottom surface of the conical tip 24 is the same as the outer diameter of the sleeve 12, and the conical tip 24 is fixed on the force transmission column 21 through threads. Strain bridge pressure compensation structures are provided on both the bore pressure sensor 313 and the cone tip sensor 323. The bore pressure sensor 313 is similar in construction to the tip sensor 323 and operates in the same manner, and only the tip sensor 323 will be described in detail herein. The cone tip sensor 323 is a hollow cylinder, and four U-shaped through grooves 321 are uniformly arranged on the cylinder at intervals along the circumferential direction, and the U-shaped through grooves 321 are communicated with the inside and the outside of the cylinder. Measurement sheets 322 are formed between adjacent U-shaped through grooves 321, compensation sheets 323 are formed on the inner side of each U-shaped through groove 321, and the width of each compensation sheet 323 is equal to that of each measurement sheet 322 along the circumferential direction. Specifically, on the peripheral surface of the cylinder, 8 parts are symmetrically divided in the circumferential direction, and each part is separated by first hole grooves which are cut out in the axial direction, and the first hole grooves divide the cylinder into 8 mutually independent units with equal width. On this basis, the second hole groove is cut out in the circumferential direction from 4 symmetrical units among the 8 units, so that the 4 units form a compensating plate 323, and the remaining 4 units are measuring plates 322. The two first hole grooves and the second hole groove are communicated to form the U-shaped groove. Therefore, the metal characteristics of the gauge piece 322 and the compensation piece 323 are identical, and the deformation is identical when the same external force is applied. The strain gauges 323 and 322 are respectively provided with strain gauges, and two strain gauges symmetrical to each other are connected in series to form a strain bridge circuit, namely one bridge of a wheatstone bridge, 2 of the 4 bridge arms are measuring bridge arms, and 2 are compensating bridge arms. The number of the strain gauges is 8, the resistance and the deformation characteristics are the same, and the 8 strain gauges are uniformly adhered to the 8 units at the same height. The compensation plate 323, the gauge plate 322 and the strain bridge circuit constitute a strain bridge type pressure compensation structure.

Through the arrangement, when the compensating type touch probe of the embodiment of the application works, the compensating type touch probe is firstly required to be provided with 10V direct current voltage to supply power for a bridge formed by strain gauges. When the compensating type touch probe is not stressed on the shore, the bridge is powered, and the output voltage of the probe is 0 according to the Wheatstone bridge principle because the resistance values of the bridge are the same.

When the temperature changes, the cone tip sensor 323 and the pore pressure sensor 313 both generate a certain amount of strain along the axial direction, and the same measured elastomer material and the same strain along the axial direction generate the same strain, so that the resistance change of the strain gauge is the same, and the voltage output is still 0 according to the Wheatstone bridge principle. Therefore, the change in temperature has no effect on the output voltage value. In this effect, further, since the compensating feeler probe has different positions and structures and generates different heat due to friction with the rock and soil, the temperature is further affected, and therefore, the strain generated in the axial direction is sometimes different, which makes the deformation of the strain gauge not capable of performing temperature compensation well. In the application, the plurality of through holes 60 are arranged on the shell 1, so that the temperature of the surface of the shell 1 can be effectively transferred, the pressure change caused by different temperature changes due to different positions and structures of heat generated by friction with rock and soil can be further compensated, namely, the temperature compensation can be well carried out, the compensation effect of the compensation type sounding probe can be further improved, and the accuracy of the underwater static sounding measurement result is further improved.

When the compensating feeler probe works in seawater, as the pressure of the seawater increases, silicone oil is extruded into the second chamber 121 by the rubber sleeve 42, the balance of the internal pressure and the external pressure of the housing 1 is kept, the internal pressure is transmitted to the sensor 3 by the silicone oil, the external pressure is transmitted to the cone tip sensor 323 by the cone tip 24 through the force transmission column 21, and the external pressure is transmitted to the pore pressure sensor 313 by the permeable stone 22 through the diaphragm 23, and due to the isotropy characteristic of the liquid, the deformation of the compensating plate 323 and the measuring plate 322 of the cone tip sensor 323 is consistent, so that the strain amount and the resistance change of the strain gauge are consistent, the bridge is in a balanced state by the Wheatstone bridge principle, the output voltage of the bridge is 0, and the output voltage of the pore pressure sensor 313 is 0.

When the compensating feeler probe penetrates into the sediment, the resistance of the cone tip 24 received by the cone tip 24 is transmitted to the cone tip sensor 323 through the force transmission column 21, and the oil bag 4 still receives only the static pressure of seawater, so that under the action of the resistance of the cone tip 24, the 4 strain gauges attached to the measuring plate 322 generate the same deformation due to the resistance of the cone tip 24, the 4 strain gauges attached to the compensating plate 323 are not stressed due to the fact that the column is dug out, the bridge is not balanced, the output voltage is not 0, and the change of the voltage value is in direct proportion to the resistance of the cone tip 24.

When the compensating feeler probe penetrates into the sediment, the pore water pressure comprises hydrostatic pressure and hyperstatic pressure, the pore water pressure is transmitted to the pore pressure sensor 313 through the permeable stone 22 and the diaphragm 23, and the hydrostatic pressure inside and outside the shell 1 is counteracted by the hydrostatic pressure of the sea water, so that under the action of the hyperstatic pressure, strain gauges attached to the pore pressure sensor 313 deform differently, the bridge is not balanced any more, the output voltage is not 0, and the change of the voltage value is in direct proportion to the resistance of the cone tip 24.

In conclusion, the probe can simultaneously eliminate nonlinear influence of temperature and sea water pressure change on measurement, is not influenced by sea water pressure when measuring resistance to the cone tip 24 and hyperstatic water pressure in deep sea, has no relation with sea water depth in measuring range, and can improve measurement accuracy.

According to a second aspect of the application, there is also provided a marine static sounding apparatus comprising a compensating sounding probe as described above.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A compensated feeler probe, comprising:

a housing configured as a case having both ends open;

the power transmission subassembly, its set up in the bottom of shell and sealed the opening of shell bottom, the power transmission subassembly includes: the force transmission column comprises a force receiving part extending out of the shell and a force transmission part positioned in the shell, a hollow accommodating cavity is formed in the force transmission part, and a plurality of water inlets communicated with the accommodating cavity are formed in the force receiving part; the sensor is arranged in the shell and is connected with the force transmission assembly, the sensor comprises a pore pressure sensor and a cone tip sensor, and the pore pressure sensor and the cone tip sensor both comprise strain bridge type pressure compensation structures; the method comprises the steps of,

the oil bag is arranged in the top end of the shell, the inner cavity of the oil bag is communicated with the inner cavity of the shell to form a channel for silicone oil to flow, the peripheral wall of the oil bag is in sealing connection with the opening of the top end of the shell, and meanwhile, a plurality of through holes which correspond to and are communicated with the side wall of the oil bag are formed in the shell, and the number of the through holes is the same as that of the water inlet holes.

2. The compensated feeler probe of claim 1 in which the size of the through hole is the same as the water inlet hole.

3. The compensated feeler probe according to claim 2, wherein the position of the through hole corresponds up and down to the water inlet hole.

4. A compensating feeler probe according to claim 3, characterized in that the peripheral wall sealing sleeve of the oil pocket is provided with a sealing plug which is in sealing connection with the inner wall of the opening of the housing.

5. The compensating feeler probe according to claim 4, wherein the cone tip sensor comprises a hollow column body, four U-shaped through grooves are uniformly arranged on the column body at intervals along the circumferential direction, measuring sheets are formed between adjacent U-shaped through grooves, compensating sheets are formed on the inner side of each U-shaped through groove, and the width of each compensating sheet along the circumferential direction is equal to that of each measuring sheet.

6. The compensated touch probe of claim 5 wherein the compensation plate and the measurement plate are provided with strain gauges, two strain gauges being symmetrical to each other are connected in series to form a strain bridge circuit, and the compensation plate, the measurement plate and the strain bridge circuit form the strain bridge pressure compensation structure.

7. The compensated feeler probe of claim 6, wherein the force transmission assembly further comprises: the permeable stone is sleeved on the stress part and covers the inlet of the water inlet hole; the diaphragm is positioned in the accommodating cavity and covers the outlet of the water inlet hole, and the hole pressure sensor is positioned in the accommodating cavity and is abutted with the diaphragm; and the cone tip is positioned at the end part of the shell and is connected with the stress part, and the cone tip sensor is connected with the force transmission part.

8. The compensated feeler probe according to claim 7, characterized in that the surface of the force-receiving portion is sheathed with a rubber gasket, which is located between the water-permeable stone and the cone tip.

9. The compensated touch probe of any one of claims 1-8 wherein the housing comprises a base and a sleeve connected to each other, a first chamber is provided in the base, a second chamber is provided in the sleeve, a communication hole for communicating the first chamber with the second chamber is provided in the base, the oil bag is located in the first chamber, the oil bag comprises an oil seal column and a rubber sleeve, the oil seal column is connected to an end of the communication hole, the rubber sleeve is sleeved on an outer peripheral surface of the oil seal column, a central hole of the oil seal column is communicated with the communication hole, and a circulation hole for communicating the central hole is provided on an outer peripheral surface of the oil seal column located inside the rubber sleeve.

10. Marine static sounding apparatus, characterized by comprising a compensating sounding probe according to any of claims 1-9.