CN112414518A

CN112414518A - Portable high-precision bubble pressure water level gauge detection device and detection method

Info

Publication number: CN112414518A
Application number: CN202011057806.6A
Authority: CN
Inventors: 张亚; 宗军; 王永东; 吴宁声; 陈杰中; 李林兴; 曹子聪; 陆叶; 杨威; 蒋东进
Original assignee: Nanjing Institute Of Hydrologic Automation Ministry Of Water Resources; Jiangsu Naiwch Corp
Current assignee: Nanjing Institute Of Hydrologic Automation Ministry Of Water Resources; Jiangsu Naiwch Corp
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-02-26
Anticipated expiration: 2040-09-30
Also published as: CN112414518B

Abstract

The invention provides a portable high-precision bubble pressure type water level gauge detection device and detection method, including a box body, a touch display screen, a processor, a digital barometer, an internal adjustment barometer, a solenoid valve array, a switch array, and a connecting pipe and pressure tanks. The invention can solve the problems such as installation difficulty, inconvenience of carrying, low detection accuracy, etc. encountered in the current field inspection and testing of the bubble pressure water level gauge, and realize fast and accurate detection and calibration on site.

Description

Portable high-precision bubble pressure type water level gauge detection device and detection method

Technical Field

The invention relates to the technical field of water level gauge detection, in particular to a portable high-precision bubble pressure type water level gauge detection device and a detection method.

Background

The water level meters currently used in the world can be roughly classified into the following types according to the measurement principle: float type water level gauge, drop-in pressure water level gauge, bubble pressure water level gauge, ultrasonic water level gauge and radar water level gauge. The water level meters have different measuring precision, using conditions and service life due to different working principles.

The bubble pressure type water level gauge is simple to install, and stability and measurement accuracy are also higher, so that water level monitoring stations in various regions in China are widely applied, but test data of the bubble pressure type water level gauge still has drift and errors after long-term operation, the test data can only be compared and calibrated through manual observation or according to data measured by other water level gauges at present, the test accuracy, efficiency and comparison and measurement standards are difficult to guarantee, and the following problems still exist when other water level gauges are adopted for comparison and measurement:

(1) the selected water level meter is not necessarily suitable for the current terrain, and the problem of difficult field inspection and test exists, and even the scheme of comparison measurement is difficult to adopt, for example, the water level meter is difficult to put at the same position.

(2) Since the bubble pressure type water level gauge is usually arranged in a field area with rare smoke, the requirement on the portability of the detection device is also provided.

(3) The accuracy of the water level gauge to be detected can only be roughly estimated by several groups of numbers, and no specific detection scheme is made for the water level gauge so as to improve the detection accuracy as much as possible.

Therefore, it is urgently needed to provide a portable high-precision bubble pressure type water level gauge inspection and test device, which is used for solving a plurality of difficult problems encountered in field inspection and test of the instruments, realizing rapid and accurate field detection and calibration of hydrological instruments and promoting the progress of water conservancy modern industry.

Disclosure of Invention

The invention aims to provide a portable high-precision bubble pressure type water level gauge detection device and a detection method, which can solve the problems of difficult installation, inconvenient carrying, low detection precision and the like in the field inspection test of the existing bubble pressure type water level gauge and realize the field rapid and precise detection and calibration.

In order to achieve the purpose, the invention provides a portable high-precision bubble pressure type water level gauge detection device, which comprises a box body, a touch display screen, a processor, a digital barometer, an internal regulation barometer, an electromagnetic valve array, a switch array, a connecting pipeline and a pressure tank, wherein the touch display screen is arranged on the box body;

the box body is cuboid, an opening is formed in the upper surface of the box body, an upturned box cover is connected to one side of the opening, a plurality of horizontal supporting bases are distributed on the edge of the top of the box body, and the separation platform is detachably erected on the supporting bases;

the touch display screen and the display end of the digital barometer are arranged on the separation platform, and the touch display screen is used for inputting an external control instruction;

the processor, the detection end of the digital barometer, the electromagnetic valve array, the switch array and the pressure tank are all fixed in a box body accommodating cavity below the separation platform;

the pressure tank is fixed at the bottom of the accommodating cavity of the box body by adopting a pressure tank mounting device; the pressure tank is provided with an air inlet and an air outlet; the air inlet hole is hermetically connected with an air inlet pipe, one end of the air inlet pipe, which is not connected with the air inlet hole, extends to the upper part of the separation platform and is connected with an air pipe connector fixed on the separation platform, and the bubble type pressure type water level meter to be detected is connected with the air inlet pipe through the air pipe connector; the air outlet is respectively connected with the detection end of the digital barometer and the air inlet end of the electromagnetic valve array in a sealing way through connecting pipelines;

the internal regulation barometer is arranged on the connecting pipeline, the detection end of the internal regulation barometer is communicated with the inside of the connecting pipeline, the actual air pressure in the pressure tank is measured in real time according to the control instruction of the processor, and the measurement result is fed back to the processor;

the processor is connected with the switch array, the switch array is connected with the control end of the electromagnetic valve array, the processor sets T groups of preset air pressure according to a preset detection strategy, and controls the opening and closing state of the electromagnetic valve array in a segmented mode through the switch array according to a preset air pressure regulation strategy by combining the current preset air pressure and the actual air pressure in the pressure tank fed back by the internal regulation barometer, partial air in the pressure tank is released at intervals with set exhaust frequency, the air pressure in the pressure tank is regulated, and the actual air pressure in the pressure tank approaches to the current preset air pressure;

the control end of the bubble pressure type water level gauge is connected with the processor, according to the control instruction of the processor, the air pressure in the pressure tank is detected in a mode of inflating the pressure tank at intervals, the detection result is displayed through the touch display screen, and a plurality of detected air pressure values form a first air pressure group P_t，t＝1,2,…,T；

The control end of the digital barometer is connected with the processor, the air pressure in the pressure tank is synchronously detected with the bubble pressure type water level meter according to the control instruction of the processor, the detection result is displayed through the display end of the digital barometer, and a plurality of detected air pressure values form a second air pressure group Q_t，t＝1,2,…,T；

In the primary detection process, the bubble pressure type water level gauge and the digital air pressure gauge continuously measure the real-time air pressure value in the pressure tank, and when the fluctuation range of the measured real-time air pressure value in the first preset time length is smaller than the corresponding set range threshold value, the average value of the air pressure in the first preset time length is taken as the corresponding detection value;

and the processor compares the first air pressure group with the second air pressure group according to a preset comparison strategy so as to analyze and obtain the detection precision and the calibration error of the bubble pressure type water level meter to be detected.

Furthermore, the connecting pipeline is in a shaft shape, a first end part and a second end part are arranged along the longitudinal direction of the connecting pipeline, a first opening is arranged on the first end part, the first opening is in sealing connection with the air outlet through a first air pipe, a second opening is arranged on the second end part, and the second opening is in sealing connection with the detection end of the digital barometer through a second air pipe;

the lateral wall of the connecting pipeline is provided with a third opening and a fourth opening, the third opening is connected with the air inlet end of the electromagnetic valve array in a sealing mode through a third air pipe, and the fourth opening is connected with the detection end of the internal regulation barometer through a fourth air pipe.

Further, the electromagnetic valve array comprises a coarse adjustment valve, a fine adjustment valve and a protection valve; the switch array comprises a coarse adjustment relay corresponding to the coarse adjustment valve, a transistor switch corresponding to the fine adjustment valve and a protection relay corresponding to the protection valve;

the air inlet end of the coarse adjustment valve is hermetically connected with the air outlet hole through a connecting pipeline, and the air outlet end of the coarse adjustment valve is hermetically connected with the air inlet end of the fine adjustment valve through a fifth air pipe;

the protection valve is directly connected to the air outlet through a corresponding connecting pipeline.

Further, the preset air pressure regulation strategy comprises:

s11, setting the initial states of the electromagnetic valve array to be closed states;

s12, measuring the actual air pressure in the pressure tank in real time by adopting an internal adjusting barometer;

s13, comparing the measured actual air pressure with the current preset air pressure:

(1) if the actual air pressure is greater than the current preset air pressure and the difference value between the actual air pressure and the current preset air pressure does not exceed the maximum air pressure difference value, setting the exhaust frequency according to the difference value between the actual air pressure and the current preset air pressure, opening the fine adjustment valve at the set exhaust frequency interval to release part of air in the pressure tank after waiting for a second preset time period, closing the fine adjustment valve until the actual air pressure is less than or equal to the current preset air pressure, and turning to the step S12;

(2) if the actual air pressure is larger than the current preset air pressure and the difference value between the actual air pressure and the current preset air pressure exceeds the maximum air pressure difference value, the protection valve is opened, warning information is sent out, and the process is ended;

(3) otherwise, the battery valve array is maintained in the closed state, and the process proceeds to step S12.

Further, the setting of the exhaust frequency according to the difference between the two means:

the influence value of single air filling of the bubble type pressure water level meter on the air pressure is set to be delta C₁The time interval between the inflation of the bubble type pressure type water level gauge is T₁The influence value of the released gas generated by the single opening of the fine adjustment valve on the air pressure is delta C₂The difference value between the actual air pressure and the current preset air pressure is C_{Difference (D)}The exhaust frequency f is calculated according to the following formula:

further, the processor sets the T groups of preset air pressures according to a preset detection strategy, including the following modes:

(1) starting to detect from the maximum pressure to the minimum pressure which can be borne by the bubble type pressure type water level meter until the resolution of the bubble type pressure type water level meter is exceeded;

(2) setting the maximum preset pressure not exceeding the maximum pressure allowed by the pressure tank and the maximum pressure born by the bubble type pressure water level gauge by taking the volume of the gas to be pumped once and the volume of the pressure tank as the design basis of the preset pressure gear;

further, the processor compares the first air pressure group with the second air pressure group according to a preset comparison strategy to analyze and obtain the detection precision and the calibration error of the bubble pressure type water level meter to be detected comprises the following steps:

calculating the first air pressure group and the second air pressure group to obtain a relative error group delta of two groups of numerical values_t＝(P_t-P₁)-(Q_t-Q₁)，t＝2,…,T；

And averaging all values of the relative error group, and combining the inherent error of the high-precision barometer and the corresponding air pressure detection range to calculate the detection precision and the calibration error of the bubble pressure type water level meter to be detected.

Further, the pressure tank mounting device comprises a horizontal base, two sleeves, two stop blocks and a plurality of fasteners;

the horizontal base is fixed at the bottom of the box body, a first groove used for bearing the pressure tank is formed in the upper surface of the horizontal base, two ends of the bottom of the first groove are respectively provided with a second groove, the second grooves are located right below the first grooves and are parallel to the first grooves, a rectangular through hole is formed in the middle of a partition plate between each second groove and the corresponding first groove, and the width of each second groove is larger than that of the rectangular through hole;

the two sleeves are respectively sleeved at two ends of the pressure tank;

the two stop blocks comprise a first stop strip and a second stop strip which are vertically connected with each other, the first stop strips are embedded in the second grooves in a one-to-one correspondence manner, the second stop strips penetrate through the rectangular through holes and extend into the first grooves, the second stop strips are carried to move to the corresponding pressure tank ends along the second grooves under the action of external horizontal force, and the pressure tank ends are connected with the adjacent sleeves through fasteners; the size of the first stop bar is matched with that of the second groove, and the width of the second stop bar is matched with that of the rectangular through hole.

Furthermore, a plurality of clamping columns are arranged on the inner side of the sleeve along the circumferential direction, the clamping columns form a bearing platform of the end part of the pressure tank, a gas pipe containing part is formed by a plane formed by the clamping columns and the bottom of the sleeve, a gas pipe outlet is formed in the top of the gas pipe containing part, and the gas inlet pipe and the first gas pipe respectively extend to the corresponding gas pipe containing parts from the gas inlet hole and the gas outlet hole and then extend to the outer side of the sleeve through the corresponding gas pipe outlets;

and an air pipe fixing mechanism for fixing the air inlet pipe and the first air pipe is arranged at the air pipe outlet.

The invention also provides a detection method of the bubble pressure type water level meter, which is executed by adopting the detection device of the portable high-precision bubble pressure type water level meter and comprises the following steps:

s1, initializing a detection device, including detecting air tightness, calibrating the digital barometer and the internal regulating barometer, and closing the electromagnetic valve array, continuously collecting the pressure reduction rate of the digital barometer and the internal regulating barometer within a preset detection time range, judging that the calibration is qualified if the pressure reduction rate of the digital barometer and the internal regulating barometer simultaneously meets the pressure reduction amplitude of less than or equal to 0.1kpa within 1min, and otherwise, re-calibrating the digital barometer and the internal regulating barometer;

s2, setting T groups of preset air pressure U according to preset detection strategies_tAnd corresponding barometric ordering, T ═ 1,2, …, T;

s3, setting i to 1;

s4, setting the air pressure U_iSetting the current preset air pressure;

s5, driving the bubble pressure type water level gauge to pump air into the pressure tank at intervals to detect real-time air pressure in the pressure tank, simultaneously adopting an internal regulation air pressure gauge to measure real-time air pressure in the pressure tank, combining the current preset air pressure and the actual air pressure in the pressure tank fed back by the internal regulation air pressure gauge, controlling the opening and closing state of the electromagnetic valve array by a switch array in a segmented mode according to a preset air pressure regulation strategy, releasing partial gas in the pressure tank at intervals of set exhaust frequency, regulating the air pressure in the pressure tank to enable the actual air pressure in the pressure tank to approach the current preset air pressure, and adopting a digital air pressure gauge and the bubble pressure type water level gauge to synchronously detect the air pressure in the pressure tank;

s6, observing the air pressure values measured by the bubble pressure type water level meter and the digital air pressure meter in real time:

when the fluctuation amplitude of a real-time air pressure value measured by the bubble pressure type water level meter in a first preset time period is smaller than a first set amplitude threshold value, taking the average value of the air pressure value in the first preset time period as the detection value of the current bubble pressure type water level meter;

when the fluctuation amplitude of a real-time air pressure value measured by the digital barometer in a first preset time period is smaller than a second set amplitude threshold value, taking the average value of the air pressure value in the first preset time period as the detection value of the digital barometer;

s7, if i is i +1, returning to step S4 until i is T + 1;

s8, detecting the bubble pressure type water level gaugeThe obtained multiple air pressure values form a first air pressure group P_tA second barometric pressure group Q is formed by a plurality of barometric pressure values detected by the digital barometer_t，t＝1,2,…,T；

And S9, comparing the first air pressure group and the second air pressure group according to a preset comparison strategy so as to analyze and obtain the detection precision and the calibration error of the bubble pressure type water level meter to be detected.

Compared with the prior art, the technical scheme of the invention has the following remarkable beneficial effects:

(1) the problems of difficulty in field inspection and test of the existing bubble pressure type water level meter, such as difficulty in installation, inconvenience in carrying and the like can be solved, and field rapid detection and calibration are realized.

(2) The digital barometer and the water level meter to be detected are used for detecting the air pressure of the same pressure tank, the preset comparison strategy is combined for comparing the measurement results of the digital barometer and the water level meter to be detected, and the detection precision and the calibration error of the bubble pressure type water level meter obtained through analysis are more accurate.

(3) And multiple groups of preset air pressures and air pressure sequencing are obtained by combining various factors such as a pressure tank, a water level meter and the like, so that the obtained detection result is more accurate and has pertinence.

(4) Set up connecting tube and regard as relaying aeration equipment, only need set up an air inlet and an air outlet on making the overhead tank, ensure the sealing performance of overhead tank on the one hand, on the other hand reduces the trachea and changes when changing the overhead tank, improves and changes efficiency.

(5) The box body is processed in a layered mode, the display end of the touch display screen and the digital barometer and the air pipe connector connected with the bubble pressure type water level meter to be detected are installed on the separation platform, and other devices are distributed and fixed in the containing cavity in the lower portion of the box body, so that the bubble pressure type water level meter can be conveniently replaced, detection parameters can be observed, and meanwhile other component structural members can be prevented from being damaged.

(6) The mode that the bubble pressure type fluviograph that adopts to wait to detect inflates in to the overhead tank carries out atmospheric pressure and detects, combines solenoid valve array and relay array to carry out the exhaust operation to the overhead tank, can realize the atmospheric pressure quick adjustment in the certain atmospheric pressure scope, obtains the measurement numerical value comparison result of bubble pressure type fluviograph and digital barometer under the different atmospheric pressure conditions fast, reduces the external possibility of carrying out frequent operation and interference to the overhead tank.

(7) The electromagnetic valve array and the switch array are adopted for carrying out exhaust operation, the electromagnetic valve is only in an opening state and a closing state, the coarse adjustment valve and the fine adjustment valve which are connected in series are adopted, and the transistor switch with quicker response time is adopted for carrying out opening and closing measures on the fine adjustment valve, so that the complicated operation and control process of the opening degree of the electromagnetic valve is avoided, and meanwhile, the air pressure adjusting precision of the pressure tank is successfully controlled within the range of +/-0.1 pa.

(8) Adopt the sleeve as the connecting piece of overhead tank and dog, adopt two sleeves with the overhead tank butt between the two, adopt the fastener again fixed with the sleeve, avoid the fastener directly to operate the overhead tank, reduce the disturbance to the overhead tank, improve the leakproofness of overhead tank to, to the overhead tank of same diameter, only need handle sleeve and overhead tank can, improve the convenience of changing the operation, reduce the operation to tracheal plug.

(8) Be provided with trachea storage part in the sleeve, avoid the overhead tank butt in-process to cause the extrusion to the trachea, in addition, adopt the fixed trachea of trachea fixed establishment who sets up at the sleeve top, can effectively avoid carrying or operating the in-process, owing to take off or the gas tightness reduction to the pine that leads to the frequent disturbance of trachea tip be connected with the overhead tank.

It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the presently disclosed subject matter.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of a portable high-precision bubble pressure type water level gauge detection device according to the present invention.

Fig. 2 is a schematic structural view of a pressure tank installation apparatus of the present invention, in which fig. 2(a) is a front view and fig. 2(b) is a plan view.

FIG. 3 is a schematic structural diagram of a pressure tank installation device after the small-sized pressure tank is replaced in the embodiment.

Detailed Description

In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.

In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily defined to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any one implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.

Referring to fig. 1, the present invention provides a portable high-precision bubble pressure type water level gauge detection device, which includes a tank, a touch display screen, a processor, a digital barometer, an internal regulation barometer, an electromagnetic valve array, a switch array, a connection pipeline, and a pressure tank 20.

The box is the cuboid form, and the box upper surface is provided with the opening, open-ended one side is connected with turns over the case lid, and box top edge distributes and is provided with a plurality of supporting bases that are the level form, separates the platform and erects on supporting base can dismantle.

The touch display screen and the display end of the digital barometer are arranged on the separation platform, and the touch display screen is used for inputting an external control instruction.

The processor, the detection end of the digital barometer, the electromagnetic valve array, the switch array and the pressure tank 20 are all fixed in a box containing cavity below the separation platform.

Adopt and separate the platform and do the layering to the box and handle, install touch-control display screen, the display end of digital barometer and with the trachea joint that the bubble pressure type fluviograph that waits to detect is connected on separating the platform, all the other equipment distributions are fixed in the holding intracavity of box lower part, when being convenient for change bubble pressure type fluviograph and observing the detection parameter, still do benefit to and avoid other component structures to suffer the damage.

The pressure tank 20 is fixed at the bottom of the accommodating cavity of the box body by adopting a pressure tank mounting device; the pressure tank 20 is provided with an air inlet hole and an air outlet hole; the air inlet hole is hermetically connected with an air inlet pipe, one end of the air inlet pipe, which is not connected with the air inlet hole, extends to the upper part of the separation platform and is connected with an air pipe connector fixed on the separation platform, and the bubble type pressure type water level meter to be detected is connected with the air inlet pipe through the air pipe connector; and the air outlet is respectively connected with the detection end of the digital barometer and the air inlet end of the electromagnetic valve array in a sealing way through connecting pipelines.

The internal regulation barometer is arranged on the connecting pipeline, the detection end of the internal regulation barometer is communicated with the inside of the connecting pipeline, the actual air pressure in the pressure tank 20 is measured in real time according to the control instruction of the processor, and the measurement result is fed back to the processor.

The processor is connected with the switch array, and the switch array is connected with the control end of solenoid valve array, the treater sets up T group according to predetermined detection strategy and predetermines atmospheric pressure to and combine the actual atmospheric pressure in the overhead tank 20 of present preset atmospheric pressure and the feedback of inside regulation barometer, according to predetermined atmospheric pressure regulation and control strategy, through the state of opening and shutting of switch array segmentation control solenoid valve array, with the partial gas of setting for the exhaust frequency interval release overhead tank 20, adjust the atmospheric pressure in the overhead tank 20, make the actual atmospheric pressure in the overhead tank 20 approach the atmospheric pressure of predetermineeing at present.

The control end of the bubble pressure type water level gauge is connected with the processor, according to the control instruction of the processor, the air pressure in the pressure tank 20 is detected in a mode of inflating the pressure tank 20 at intervals, the detection result is displayed through the touch display screen, and a plurality of detected air pressure values form a first air pressure group P_t，t＝1,2,…,T。

The control end of the digital barometer is connected with the processor, the air pressure in the pressure tank 20 is synchronously detected with the bubble pressure type water level meter according to the control instruction of the processor, the detection result is displayed through the display end of the digital barometer, and a plurality of detected air pressure values form a second air pressure group Q_t，t＝1,2,…,T。

In one detection process, the bubble pressure type water level meter and the digital air pressure meter continuously measure the real-time air pressure value in the pressure tank 20, and when the fluctuation range of the measured real-time air pressure value in the first preset time length is smaller than the corresponding set range threshold value, the average value of the air pressure in the first preset time length is taken as the corresponding detection value.

Referring to fig. 2, in some examples, the pressure tank mounting apparatus includes a horizontal base 11, two sleeves 13, two stops 12, and a number of fasteners 14.

The horizontal base 11 is fixed at the bottom of the box body, a first groove 111 for bearing the pressure tank 20 is arranged on the upper surface of the horizontal base 11, two second grooves 112 are respectively arranged at two ends of the bottom of the first groove 111, the second grooves 112 are positioned under the first groove 111 and are parallel to the first groove 111, a rectangular through hole 113 is arranged in the middle of a partition plate between the second grooves 112 and the first groove 111, and the width of the second grooves 112 is greater than that of the rectangular through hole 113.

The two sleeves 13 are respectively sleeved at two ends of the pressure tank 20.

The two stoppers 12 comprise a first blocking strip 122 and a second blocking strip 121 which are vertically connected with each other, the first blocking strips 122 are embedded in the second grooves 112 in a one-to-one correspondence manner, the second blocking strips 121 extend into the first grooves 111 through the rectangular through holes 113, and carry the second blocking strips 121 to move to the corresponding end parts of the pressure tanks 20 along the second grooves 112 under the action of external horizontal force, and are connected with the adjacent sleeves 13 through fasteners 14; the size of the first barrier strip 122 is matched with that of the second groove 112, and the width of the second barrier strip is matched with that of the rectangular through hole 113.

When the pressure tank 20 is installed, firstly, the two sleeves 13 are sleeved at the two ends of the pressure tank 20, so that the pressure tank 20 is fixed between the two sleeves 13; then, the pressure tank 20 with the sleeve 13 installed is placed in the first groove 111, and at the moment, the two stop blocks 12 are respectively positioned at two sides of the pressure tank 20; the two blocks 12 are further horizontally moved along the second groove 112 to gradually and horizontally move the blocks 12 to be connected with the adjacent sleeve 13 by applying opposite horizontal forces, the blocks 12 are locked on the sleeve 13 by the fasteners 14, and an opposite horizontal pushing force is applied on the pressure tank 20, so that the pressure tank 20 is fixed in the first groove 111. Since the size of the first barrier 122 is matched with that of the second groove 112 and the width of the second groove 112 is larger than that of the rectangular through hole 113, even if the pressure tank installation device is turned over, the pressure tank 20 can still be stably installed in the first groove 111 due to the gravity all applied to the partition plate and the fastening member 14, which is convenient for the user to carry for a long distance. Here adopts sleeve 13 as the connecting piece of overhead tank 20 and dog 12, adopt two sleeves 13 with overhead tank 20 butt between the two, it is fixed with sleeve 13 to adopt fastener 14 again, avoid fastener 14 directly to operate overhead tank 20, reduce the disturbance to overhead tank 20, improve the leakproofness of overhead tank 20, and, to the overhead tank 20 of same diameter, only need handle sleeve 13 and overhead tank 20 can, improve the convenience of changing the operation, reduce the tracheal plug operation.

When the pressure tank 20 is replaced, the fastener 14 is only loosened, and the stopper 12 and the sleeve 13 are sequentially removed, so that the current pressure tank 20 can be quickly removed, and the installation action of a new pressure tank 20 is performed.

Preferably, a plurality of clamping columns 131 are arranged on the inner side of the sleeve 13 along the circumferential direction, the clamping columns 131 form a bearing platform at the end part of the pressure tank 20, a gas pipe containing part is formed between a plane formed by the clamping columns 131 and the bottom of the sleeve 13, a gas pipe outlet is formed in the top of the gas pipe containing part, the gas inlet pipe and the first gas pipe 21 extend to the corresponding gas pipe containing part from the gas inlet hole and the gas outlet hole respectively, and then extend to the outer side of the sleeve 13 through the corresponding gas pipe outlet. More preferably, the air pipe outlet is provided with an air pipe fixing mechanism 132 for fixing the air inlet pipe and the first air pipe 21. Through set up trachea storage part in sleeve 13, avoid the overhead tank 20 butt in-process to cause the extrusion to the trachea, in addition, adopt the trachea fixed establishment 132 that sets up at sleeve 13 top to fix the trachea, can effectively avoid carrying or the operation in-process, owing to take off or the gas tightness reduction to the pine that leads to the frequent disturbance of trachea tip be connected with overhead tank 20. For example, adopt two joinable cross sections to become half annular joint portion, joint portion establishes the pipeline both sides at intake pipe or first trachea 21 with horizontal migration, two joint portions move near each other and form a cylindrical cavity that is used for holding the tracheal tube in its middle part after the joint, be provided with the external screw thread of joinable on the lateral wall of two joint portions, will have the internal screw thread of assorted nut to connect in two joint portion outsides soon again, make two joint portion butts and circumference apply horizontal force on the tracheal tube, fix the trachea in trachea exit with the help of the resilience force of tracheal tube and the frictional force of joint portion inner wall. Preferably, be provided with the elastic washer who is used for taking the decorative pattern on the joint portion inside wall for improve the frictional force of tracheal tube and joint portion inner wall, and reduce the wearing and tearing of joint portion to the pipeline.

More preferably, a horizontally disposed protection mechanism, such as a straight rod for shielding, is connected to an upper portion of the opposite side wall of the sleeve 13, so as to prevent other equipment from impacting and damaging the pressure tank 20 from above the pressure tank 20 during movement or operation.

The shape of the first groove 111 and the second groove 112 is determined according to actual requirements, for example, the cross sections are rectangular. The purpose of the first recess 111 is to carry the pressure vessel 20 and the purpose of the second recess 112 is to snap the stop 12.

Preferably, the pressure tank installation device is made of hard materials such as metal, in order to reduce the damage of the pressure tank installation device to the pressure tank 20, an elastic pad is laid on the upper surface of the bottom of the first groove 111, and the design can effectively reduce the impact force on the pressure tank 20 when the pressure tank installation device is installed or moved for a long distance, so as to protect the pressure tank 20 from being damaged.

As a preferable example, the bottom of the second groove 112 is horizontally provided with a guide rail, the extension direction of the guide rail is parallel to the axial center line of the pressure tank 20, the bottom of the first barrier strip 122 is provided with a sliding assembly, and the first barrier strip 122 is mounted on the guide rail through the sliding assembly and moves along the guide rail. Through the aforementioned structure design, the first barrier 122 can move smoothly in the second groove 112. It should be understood that the location of the guide rail is not limited to the bottom of the second groove 112, and in fact, the guide rail may be installed on any one side of the second groove 112, and preferably, one guide rail may be installed on each of two opposite sides to better move the first bar 122. The choice of the design at the bottom allows for increasing the contact surface between the first bar 122 and the divider plate when the tank is inverted to further reduce the pressure between the two.

Preferably, the pressure tank 20 can be made of an aluminum alloy material, so that deformation is not easy to occur, and the stability and reliability of the air pressure to be measured are ensured. Practice proves that the larger the size of the pressure tank 20 is, the smaller the airflow disturbance generated by the air pressure change is, and the detection precision is higher, but the overlarge pressure tank 20 is inconvenient to assemble and carry, and the optimal volume of the pressure tank 20 needs to be determined by comprehensive consideration. And through aforementioned structural design, the overhead tank installation device that this application provided can the not pressure tank 20 of unidimensional model of quick replacement, and the detection device's portability is detected to the balance, makes detection device can adapt to the detection demand under the different situation. Fig. 3 is a schematic structural view of the pressure tank installation apparatus after the small-sized pressure tank 20 is replaced.

The technical principle of measuring the water level by the bubble pressure type water level gauge is that air is blown to a fixed measuring point underwater through an air pipe, when the air pressure in the air blowing pipe is balanced with the hydrostatic pressure of the measuring point, the balanced air pressure in the air blowing pipe is measured, and the balanced air pressure is the water pressure of the measuring point, so that the water depth of the measuring point is obtained through calculation, and the water level value is obtained. Therefore, whether the water level data measured by the bubble pressure type water level meter is accurate, namely whether the air pressure data measured by the bubble pressure type water level meter is accurate is detected.

Based on the detection principle, the invention provides that an adjustable pressure tank 20 is arranged, a bubble pressure type water level meter to be detected and a high-precision digital air pressure meter are connected to the pressure tank 20 at the same time, wherein the bubble pressure type water level meter continuously or intermittently detects the air pressure in the pressure tank 20 by inflating the pressure tank 20, the detection error and the detection precision of the bubble pressure type water level meter to be detected are obtained by analyzing the degrees of the bubble pressure type water level meter and the high-precision digital air pressure meter under different pressure conditions, and the bubble pressure type water level meter to be detected is calibrated and adjusted by combining the analysis result, so that the problems of difficulty in field inspection and test of the existing bubble pressure type water level meter are successfully solved, and the field rapid detection and calibration are realized.

In one detection process, the bubble pressure type water level gauge and the digital air pressure gauge are set to continuously measure the real-time air pressure value in the pressure tank 20, and in consideration of the fact that the air charging and discharging operations are continuously performed in the pressure tank 20, especially when one preset air pressure finishes the detection and turns to the other preset air pressure, the air pressure change range in the pressure tank 20 is large, and in order to improve the measurement accuracy as much as possible, the invention is set as follows: for bubble pressure type water level meters and digital air pressure meters, only when the fluctuation range of the real-time air pressure value obtained by measurement in the first preset time period is smaller than the corresponding set range threshold value (namely, the air pressure in the pressure tank 20 reaches a steady state), the average value of the air pressure in the first preset time period is taken as the corresponding detection value of this time. Based on this setting, the detection efficiency can be improved from three aspects, namely, firstly, the preset air pressures are reasonably arranged in sequence, for example, a plurality of groups of preset air pressures are arranged in a sequence from small to large or a sequence from large to small, so as to reduce the sum of absolute values of air pressure changes, and secondly, measures are adopted to enable the air pressure in the pressure tank 20 to reach the preset air pressure as quickly as possible, which needs to be regulated and controlled from multiple aspects such as air tightness, air charging and discharging means and the like. Thirdly, the detection precision is improved. The method comprises the following specific steps:

(I) improve the air tightness of the whole detection device

As the relay ventilation equipment, the connecting pipeline is arranged, so that only one air inlet and one air outlet are needed to be arranged on the pressure tank 20, on one hand, the sealing performance of the pressure tank 20 is ensured, on the other hand, the replacement of the air pipe is reduced when the pressure tank 20 is replaced, and the replacement efficiency is improved. As a preferable example of the above, the connection pipe is in a shaft shape, and a first end portion and a second end portion are provided along a longitudinal direction of the connection pipe, the first end portion is provided with a first air hole, the first air hole is hermetically connected to the air outlet through a first air pipe 21, the second end portion is provided with a second air hole, and the second air hole is hermetically connected to the detection end of the digital barometer through a second air pipe.

Since the accuracy of the digital type barometer is high, the digital type barometer can be approximately regarded as the actual air pressure in the pressure tank 20, and the user can adjust the air pressure in the pressure tank 20 according to the detection value of the digital type barometer. However, considering that the detection of the digital type barometer is intermittent, in the present application, the pressure of the pressure tank 20 is detected in real time by using the internal adjustment barometer, which is installed on the connection pipe with its detection end communicated with the inside of the connection pipe through the fourth air pipe to reduce the length of the fourth air pipe as much as possible in order to reduce the detection error as much as possible, the internal adjustment barometer measures the actual pressure in the pressure tank 20 in real time according to the external control command, and the measurement result is displayed through the touch display screen.

(II) setting of air pressure adjusting mode

The air pressure adjusting manner of the pressure tank 20 includes the following three types:

(1) the pressure tank 20 is provided with an air inlet hole as an air inlet and an air outlet hole as an air outlet, the air outlet hole is connected with the electromagnetic valve array, and the redundant air is discharged through the electromagnetic valve array to reduce the air pressure in the pressure tank 20.

(2) The air inlet hole is connected with a bubble pressure type water level meter, and when the bubble pressure type water level meter detects air pressure, air can be pumped into the pressure tank 20 at the same time, so that the air pressure in the pressure tank 20 is improved.

(3) The air inlet hole can also be connected with other external air transmission equipment, and the pressure tank 20 is inflated through the other external air transmission equipment, so that the air pressure in the pressure tank 20 is improved.

In fact, the adjustment mode (3) is only occasionally applied before the pressure tank 20 is installed. In the invention, the pressure tank 20 is inflated and deflated mostly by adopting two modes of inflation of the bubble water level meter and deflation of the electromagnetic valve, so that the air pressure within a certain air pressure range is quickly adjusted, the measurement value comparison results of the bubble pressure water level meter and the digital barometer under different air pressure conditions are quickly obtained, meanwhile, the possibility of frequent operation and interference of the outside on the pressure tank 20 is reduced, and the air tightness of the detection device is indirectly improved.

Meanwhile, before detection, the detection efficiency can be greatly improved by reasonably setting the preset air pressure and the air pressure sequencing, for example, a plurality of groups of preset air pressures are arranged in a sequence from large to small or from small to large, and the like.

(III) exhausting operation through switch array

The electromagnetic valve array comprises a coarse adjusting valve, a fine adjusting valve and a protecting valve; the switch array comprises a coarse adjustment relay corresponding to the coarse adjustment valve, a transistor switch corresponding to the fine adjustment valve and a protection relay corresponding to the protection valve;

the air inlet end of the coarse adjustment valve is connected with the air outlet hole in a sealing mode through a connecting pipeline, and the air outlet end of the coarse adjustment valve is connected with the air inlet end of the fine adjustment valve in a sealing mode through a fifth air pipe.

The preset air pressure regulation strategy comprises the following steps:

and S11, setting the initial state of the solenoid valve array to be a closed state.

S12, the actual pressure in the pressure tank 20 is measured in real time using an internally regulated barometer.

(1) if the actual air pressure is greater than the current preset air pressure and the difference between the actual air pressure and the current preset air pressure does not exceed the maximum air pressure difference, setting the exhaust frequency according to the difference between the actual air pressure and the current preset air pressure, starting the fine adjustment valve at the set exhaust frequency interval to release part of the air in the pressure tank 20 after waiting for a second preset time period, closing the fine adjustment valve until the actual air pressure is less than or equal to the current preset air pressure, and turning to step S12.

(2) And if the actual air pressure is greater than the current preset air pressure and the difference value between the actual air pressure and the current preset air pressure exceeds the maximum air pressure difference value, opening the protection valve, sending out warning information and ending the process.

The control precision of the air pressure in the pressure tank 20 directly affects the detection precision of the final water level gauge, and is different from the conventional method that a complex-structure electromagnetic valve with adjustable opening and closing degree is adopted or a PLD algorithm is adopted to control the electromagnetic valve, and the invention adopts the electromagnetic valve array with only two opening and closing states and the corresponding switch array to perform the exhaust operation. In the invention, the coarse adjustment valve, the fine adjustment valve and the protection valve which form the electromagnetic valve array only have two open and close states, and the fine adjustment valve is opened and closed by the coarse adjustment valve and the fine adjustment valve which are connected in series and a transistor switch with quicker response time, so that the air pressure adjusting precision of the pressure tank 20 is successfully controlled within the range of +/-0.1 pa while the complicated opening and closing degree operation and control process of the electromagnetic valve are avoided.

When the air pressure in the pressure tank 20 exceeds the maximum allowable air pressure threshold, the protective valve is opened to quickly release the air in the pressure tank 20, and the detection device is prevented from being damaged due to overlarge air pressure.

Preferably, the setting of the exhaust frequency according to the difference between the two values is:

single-time filling of bubble type pressure type water level gaugeThe influence value of the gas entering on the gas pressure is Delta C₁The time interval between the inflation of the bubble type pressure type water level gauge is T₁The influence value of the released gas generated by the single opening of the fine adjustment valve on the air pressure is delta C₂The difference value between the actual air pressure and the current preset air pressure is C_{Difference (D)}The exhaust frequency f is calculated according to the following formula:

more preferably, the frequency setting is preferably performed by the equation of the following formula, and the reason for setting the unequal sign is that in practical application, the condition of the equation is difficult to be satisfied, so that the trim valve can continuously adjust the exhaust frequency of the trim valve according to the difference value by setting the range formula, and finally the exhaust frequency and the inflation frequency of the bubble type pressure water level meter are dynamically balanced.

(IV) reasonably setting a detection strategy to pertinently improve the detection precision

In the invention, a mode of setting T groups of preset air pressure partially according to a preset detection strategy is provided, and a user can select one of the T groups according to actual requirements.

The bubble water level meter detects that a preset pressure value is reached through an inflating mode at present, the detection precision of the water level sensor is calculated through comparison of actually measured pressure and pressure drop amplitude displayed by the water level sensor, but in the actual use process, due to the fact that the preset pressure is divided into different gears, the pressure difference directly influences the precision, and therefore the following convention is made.

In the first scheme, the water level meter detects from the maximum pressure to the minimum pressure (namely from deep to shallow) which can be borne by each sensor until the resolution of the sensor is exceeded:

and in the second scheme, the volume of the gas to be pumped once and the volume of the pressure tank 20 are taken as the design basis of a preset pressure gear, the maximum preset pressure does not exceed the maximum pressure allowed by the pressure tank 20 and the maximum pressure born by each sensor, and the setting is carried out by rounding.

And in the third scheme, the volume of the gas to be injected at one time and the volume of the pressure tank 20 are taken as the design basis of the preset pressure gear, the internal pressure is increased by reducing the volume of the pressure tank 20, but the maximum reduction amount is not more than 50% by considering the volume of the pressure tank 20 and the design difficulty, and the method can be used as the supplement and perfection of the second scheme.

For example, 5 times of inflation to the pressure tank 20, the data reading, the deflation, 4 times of inflation, the data reading, and the like are performed during the detection according to the inflation 5 times.

In addition, because the device can not be completely airtight, the air leakage phenomenon can not be avoided in the using process, the air leakage leveling rate is higher when the pressure is higher, and the air leakage speed directly influences the detection precision, the air leakage frequency needs to be detected and calibrated after the equipment leaves a factory and is used for a period of time, the specific method comprises the steps of calculating the maximum pressure of the high-precision pressure gauge 200Kpa, maintaining the pressure at the maximum pressure by two methods of inflating and adjusting the volume of the pressure tank 20, and calculating the pressure at 200Kpa and 150Kpa through PLC automatic timing; 150 and 100 Kpa; 100-50 Kpa; the required time is respectively put into a controller to be used as a correction basis for precision calculation.

(V) selecting a comparison strategy with smaller error and stronger pertinence, reducing detection error and improving detection precision

The processor compares the first air pressure group with the second air pressure group according to a preset comparison strategy to analyze and obtain the detection precision and the calibration error of the bubble pressure type water level gauge to be detected, and the method comprises the following steps of:

calculating the first air pressure group and the second air pressure group to obtain a relative error group delta of two groups of numerical values_t＝(P_t-P₁)-(Q_t-Q₁)，t＝2,…,T。

Averaging all values of the relative error group, and combining the inherent error of the high-precision barometer and the corresponding air pressure detection range to calculate the detection precision and calibration error of the bubble pressure type water level meter to be detected

Based on the detection device, the invention also provides a detection method of the bubble pressure type water level meter, which comprises the following steps:

and S1, initializing a detection device, wherein the detection device comprises a detection airtightness digital barometer, a calibration digital barometer, an internal regulation barometer and a closed electromagnetic valve array. And continuously acquiring the pressure reduction rate of the digital barometer and the internal pressure regulator within a preset detection time range, judging that the calibration is qualified if the pressure reduction rate of the digital barometer and the internal pressure regulator simultaneously meets the pressure reduction amplitude of less than or equal to 0.1kpa within 1min, and otherwise, re-calibrating the digital barometer and the internal pressure regulator.

S2, setting T groups of preset air pressure U according to preset detection strategies_tAnd corresponding air pressure sequence, T1, 2, …, T.

S3, where i is 1.

S4, setting the air pressure U_iThe current preset air pressure is set.

S5, driving the bubble pressure type water level gauge to inflate the pressure tank 20 at intervals to detect the real-time air pressure in the pressure tank 20, meanwhile, adopting an internal regulation air pressure gauge to measure the actual air pressure in the pressure tank 20 in real time, combining the current preset air pressure and the actual air pressure in the pressure tank 20 fed back by the internal regulation air pressure gauge, controlling the opening and closing state of the electromagnetic valve array in a segmented mode through the switch array according to a preset air pressure regulation strategy, releasing part of air in the pressure tank 20 at intervals of set exhaust frequency, regulating the air pressure in the pressure tank 20 to enable the actual air pressure in the pressure tank 20 to approach the current preset air pressure, and adopting a digital air pressure gauge and the bubble pressure type water level gauge to synchronously detect the air pressure in the pressure tank 20.

and when the fluctuation amplitude of the real-time air pressure value measured by the bubble pressure type water level meter in the first preset time is smaller than a first set amplitude threshold value, taking the average value of the air pressure value in the first preset time as the detection value of the bubble pressure type water level meter at this time.

When the fluctuation range of a real-time air pressure value measured by the digital barometer in a first preset time period is smaller than a second set range threshold value, taking the average value of the air pressure value in the first preset time period as the detection value of the digital barometer.

S7, if i is i +1, the process returns to step S4 until i is T + 1.

S8, mixing the bubblesA plurality of air pressure values detected by the pressure type water level gauge form a first air pressure group P_tA second barometric pressure group Q is formed by a plurality of barometric pressure values detected by the digital barometer_t，t＝1,2,…,T。

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A portable high-precision bubble pressure type water level gauge detection device is characterized by comprising a box body, a touch display screen, a processor, a digital barometer, an internal regulation barometer, an electromagnetic valve array, a switch array, a connecting pipeline and a pressure tank, wherein the touch display screen is arranged on the box body;

2. The portable high-precision bubble pressure type water level gauge detecting device according to claim 1, wherein the connecting tube is in a shaft shape and is provided with a first end portion and a second end portion along a longitudinal direction, the first end portion is provided with a first opening, the first opening is hermetically connected with the air outlet through a first air tube, the second end portion is provided with a second opening, and the second opening is hermetically connected with the detecting end of the digital air pressure gauge through a second air tube;

3. The portable high-precision bubble pressure type water level gauge detecting device according to claim 1, wherein the electromagnetic valve array comprises a rough adjusting valve, a fine adjusting valve and a protecting valve; the switch array comprises a coarse adjustment relay corresponding to the coarse adjustment valve, a transistor switch corresponding to the fine adjustment valve and a protection relay corresponding to the protection valve;

4. The portable high-precision bubble pressure type water level gauge detecting device according to claim 3, wherein the preset air pressure regulating strategy comprises:

5. The portable high-precision bubble pressure type water level gauge detecting device according to claim 4, wherein the setting of the exhaust frequency according to the difference between the two is:

6. the portable high-precision bubble pressure type water level gauge detecting device according to claim 1, wherein the processor setting the T sets of preset air pressures according to the preset detection strategy comprises the following modes:

(2) the volume of the gas to be pumped once and the volume of the pressure tank are taken as the design basis of the preset pressure gear, the maximum preset pressure does not exceed the maximum pressure allowed by the pressure tank and the maximum pressure born by the bubble type pressure water level gauge, and the setting is carried out by taking the whole.

7. The portable high-precision bubble pressure type water level gauge detecting device according to claim 1, wherein the processor compares the first air pressure group and the second air pressure group according to a preset comparison strategy to analyze and obtain the detection precision and the calibration error of the bubble pressure type water level gauge to be detected comprises the following steps:

8. The portable high-precision bubble pressure type water level gauge detecting device according to claim 1, wherein said pressure tank mounting device comprises a horizontal base, two sleeves, two stoppers and a plurality of fasteners;

the two sleeves are respectively sleeved at two ends of the pressure tank;

9. The portable high-precision bubble pressure type water level gauge detecting device according to claim 8, wherein a plurality of clamping columns are arranged on the inner side of the sleeve along the circumferential direction, the clamping columns form a supporting platform of the end part of the pressure tank, a gas pipe accommodating part is formed by a plane formed by the clamping columns and the bottom of the sleeve, a gas pipe outlet is arranged on the top of the gas pipe accommodating part, and the gas inlet pipe and the first gas pipe respectively extend from the gas inlet hole and the gas outlet hole to the corresponding gas pipe accommodating parts and then extend to the outer side of the sleeve through the corresponding gas pipe outlets;

10. A detection method of a bubble pressure type water level gauge, which is performed using the portable high-precision bubble pressure type water level gauge detection device as claimed in any one of claims 1 to 9, comprising the steps of:

s3, setting i to 1;

s4, setting the air pressure U_iSetting the current preset air pressure;

s7, if i is i +1, returning to step S4 until i is T + 1;

s8, forming a first air pressure group P by a plurality of air pressure values detected by the bubble pressure type water level meter_tA second barometric pressure group Q is formed by a plurality of barometric pressure values detected by the digital barometer_t，t＝1,2,…,T；