CN218584145U - Water level measuring device for automatically identifying liquid level for river/hydraulic physical model - Google Patents
Water level measuring device for automatically identifying liquid level for river/hydraulic physical model Download PDFInfo
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- CN218584145U CN218584145U CN202222374026.5U CN202222374026U CN218584145U CN 218584145 U CN218584145 U CN 218584145U CN 202222374026 U CN202222374026 U CN 202222374026U CN 218584145 U CN218584145 U CN 218584145U
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Abstract
The utility model provides a water level measuring device for river/water conservancy project physical model's automatic identification liquid level, including liquid level automatic identification device and the visual device of survey probe reading. The liquid level automatic identification device is characterized in that a circuit element in the insulating component, the measuring needle and the measuring needle cylinder form an accurate identification system, so that the subjective head level of different experimenters and the error influence caused by the surface tension of the water surface when the traditional water level measuring needle is in contact with the liquid level can be effectively reduced, and when the LED lamp on the insulating component emits light, the measuring needle is in a critical state just in contact with the liquid level. The visual device of survey needle reading mainly comprises high accuracy voltage measurement display device and survey needle bar, and wherein the survey needle bar is a linear resistor who has fixed resistance, controls the partial pressure size of voltage measurement module through the lift survey needle bar, rethread resistance rate formula and ohm law deduction survey needle bar lift length.
Description
Technical Field
The utility model belongs to water level/liquid level measurement detection device, especially to the operability of river/water conservancy project physical model water level gauge needle optimize the improvement, promote measured data's accuracy, concretely relates to water level measurement device who possesses the automatic identification liquid level in being applicable to river/water conservancy project physical model experiment.
Background
The water level is an important control/acquisition physical parameter of a physical model or a numerical simulation test, such as water level verification, boundary condition control, flood control influence evaluation engineering project research and the like.
The water level measurement of the river work/hydraulic work physical model still mainly uses a water level measuring needle, the device mainly comprises a vernier caliper and a measuring needle, the vernier caliper and the measuring needle are kept to be vertically downward in the installation process, but the water level measuring needle on the market does not have a vertical correction device, other external vertical correction equipment such as a plumb line and the like are not needed to adjust the verticality of the water level measuring needle, and the current state of the measuring needle cannot be effectively and accurately judged. In addition, when the large-scale physical models for river work and hydraulic work are used for a period of time, the self weight and the overlying water of the large-scale physical models can cause uneven settlement of the foundation, and the measuring pins at different positions incline to different degrees, so that the reading of the measuring pins of the physical models has a certain error with the real water level value.
Besides the verticality of the measuring needle, the position identification of the measuring needle and the liquid level of the measuring needle cylinder is also an important influence factor for water level measurement. The liquid level identification of the conventional water level measuring needle is carried out by means of a method that an experimental observer looks straight on a critical state that the needle point of the measuring needle is just in contact with the liquid level, but due to the subjective looking straight error of different experimenters and the influence of water surface tension, the parallax of each person is difficult to be ensured to be the same, and the needle point of the measuring needle is accurately judged to be just above the liquid level, so that the reading error of the measuring needle is caused; the influence of the installation height position of the vernier caliper, the corrosion degree and the brightness degree of light can directly cause the reading difficulty of the vernier caliper, and errors caused by man-made and environmental changes are introduced. The existence of the physical model scale can further amplify the influence degree of the factors, so that the water level measured by the physical model is converted into the water level difference between the prototype water level and the real water level of the natural river channel, and the water level difference is increased. In extreme cases, the measured water level values are completely wrong, resulting in measurement results deviating from natural reality.
The river work/hydraulic work physical model is an important demonstration and research means for large-scale hydraulic engineering construction, and a water level measuring device which is used for the river work/hydraulic work physical model and can objectively judge whether equipment is in a vertical state and automatically identify a liquid level is very necessary to be researched and designed, so that measurement data errors caused by inconsistency of judgment standards of whether a water level measuring needle is in the vertical state and whether the water level measuring needles of different experimenters are exactly on the measured liquid level are eliminated, and the accuracy of measuring the water level data is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a water level measuring device for automatically identifying the liquid level of a river work/hydraulic physical model, which can judge whether a measuring probe is in a vertical state in real time and make corresponding adjustment to make the measuring probe return to the vertical state; the position of the needle point of the measuring needle on the liquid level is accurately judged by utilizing the short circuit characteristic of the circuit, the relation between the voltage division of the measuring needle and the reading of the measuring needle is established, a digital signal is output, and the accurate water level reading of the model water level measuring needle is obtained.
In order to realize the technical purpose, the utility model adopts the following technical means:
a water level measuring apparatus for automatically recognizing a liquid level for a physical model of river/water works, comprising:
the probe rod is a linear resistor which is made of alloy and has a fixed resistance value, the top is embedded with a leveling bubble,
the probe sleeve is coaxially and fixedly sleeved at the bottom end of the probe rod, and a vertically arranged rack is arranged on the outer wall of the probe sleeve;
the fine adjustment sleeve is coaxially sleeved outside the probe sleeve, a through hole is formed in the outer wall of the fine adjustment sleeve, one end of a transmission rod extends into a space between the micro-motion sleeve and the probe sleeve through the through hole and then is in transmission connection with the rack through a transmission gear, one end of the transmission rod, which is located on the outer side of the micro-motion sleeve, is connected with a knob, and the probe sleeve is enabled to slightly lift relative to the fine adjustment sleeve through rotation of the knob;
the conductive spring sliding sheet is fixed at the top of the probe sleeve, a sliding groove is formed in the side edge of the probe rod, and the conductive spring sliding sheet is in close contact with the sliding groove;
the lower end of the needle measuring rod is sequentially coaxially and detachably connected with a connecting rod and an insulating member, the bottom end of the insulating member is provided with two vertical and parallel measuring needles which are respectively a long measuring needle and a short measuring needle,
the built-in circuit element of insulating member includes: a first DC power supply, a second fixed resistor, a first switch, an LED lamp and a first fixed resistor,
the upper end of the long measuring pin is connected with the LED lamp and the first fixed resistor 18 in series in sequence through a first lead and then is connected with the upper end of the short measuring pin;
the positive electrode of the first direct current power supply is sequentially connected with a second fixed resistor and a first switch in series through a second lead and then connected with the upper end of the short measuring pin;
the needle measuring cylinder is arranged at the lower ends of the two needle measuring cylinders, the long needle measuring cylinder can contact the liquid level in the needle measuring cylinder, and the short needle measuring cylinder is not contacted with the liquid level in the needle measuring cylinder; a needle measuring cylinder conducting strip is arranged on the wall of the needle measuring cylinder and is connected with the negative electrode of the first direct current power supply through a third conducting wire to form an automatic liquid level identification device, and the LED lamp is on at the moment;
voltage measurement module and power supply unit includes: the positive electrode of the second direct current power supply, the third fixed resistor, the second switch and the positive electrode of the voltage measuring module are sequentially connected through a lead;
one end of the fourth conducting wire is connected with the top end of the needle measuring rod, and the other end of the fourth conducting wire is connected with the positive electrode of the voltage measuring module;
one end of the fifth lead is connected with the bottom end of the probe rod, and the other end of the fifth lead is connected with the negative electrode of the second direct current power supply, so that the second direct current power supply, the second fixed resistor, the second switch and the whole probe rod form a series circuit;
and one end of the sixth lead is connected with the conductive spring sliding sheet, the other end of the sixth lead is connected with the negative electrode of the voltage measuring module, the second direct current power supply, the second fixed resistor, the second switch, the voltage measuring module and the probe rod form a partial pressure type sliding circuit in the processes of drawing, pressing and fine-tuning the probe rod, and the voltage measuring module measures the voltage value corresponding to the resistor between the fourth lead and the sixth lead.
Further, the length difference of the long measuring needle and the short measuring needle is 0.2mm.
Further, still include the subassembly of rectifying, set up one side of survey needle bar is used for with survey needle bar adjusts to vertical state, includes:
the fixed support is fixed on the side wall of the river/hydraulic physical model;
the micro-motion adjusting assembly is arranged on the fixed support and comprises an upper top plate, a lower cushion plate and a plurality of vertical micro-adjusting units connected between the upper top plate and the lower cushion plate;
the upper top plate is connected with the fine adjustment sleeve through a dowel bar.
Further, the voltage measuring module and the power supply device are arranged on the upper top plate.
Further, the vertical fine adjustment unit is a screw rod adjusting assembly.
Furthermore, the fixed support is an L-shaped support, and the voltage measuring module and the power supply device are fixed on the short side of the L-shaped support through an angle code;
the needle measuring cylinder is vertically fixed on the long edge of the L-shaped bracket.
An elastic reed is fixedly arranged on the inner wall of the pipe of the measuring needle sleeve, is in a hook shape, can have certain elasticity in the process of drawing and pressing the measuring needle rod, and can self-lock the measuring needle sleeve and the measuring needle rod in a natural state.
The utility model has the advantages that:
the water level measuring device for the river work/hydraulic work physical model, provided by the invention, can objectively judge whether equipment is in a vertical state and automatically identify the liquid level, eliminates measurement data errors caused by inconsistent judgment standards of whether a water level measuring probe is in the vertical state, environmental light changes and whether the water level measuring probe of different experimenters is exactly on the measured liquid level, improves the accuracy of measuring the water level data, and improves the reliability of boundary control conditions of the river work/hydraulic work physical model and water level related research results.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the structure of the needle measuring cylinder of the present invention;
FIG. 3 is a schematic view of the structure of the fine tuning sleeve and the probe sleeve of the present invention;
FIG. 4 is a perspective view of the insulating member and the stylus;
FIG. 5 is the assembly diagram of the deviation correcting module, the voltage measuring module and the power supply device
FIG. 6 is a cross-sectional view of the insulating member and the electrical circuitry built into the stylus;
FIG. 7 is a circuit diagram of an automatic liquid level recognition device and a probe reading visualization device
Wherein 1: leveling air bubbles; 2: a needle measuring rod; 3: a dowel bar; 4: a micro-motion adjusting assembly; 5: a conductive spring slide; 6: a chute; 7-1: a probe sleeve; 7-2: a micro-motion sleeve; 8: a knob; 9: an elastic spring plate; 10 connecting the rod; 11: an insulating member; 12: LED lamp: 13: a long measuring needle; 14: short measuring pins; 15: a voltage measuring module and a power supply device; 16: corner connectors; 17: fixing a bracket; 18: a first fixed resistor; 19: a probe cylinder conducting strip;
l-1: a fourth conductive line; l-2: a sixth conductive line; l-3: a fifth conductive line; l-4 is a third conducting wire;
d-1, a first conductive reed; d-2, a second conductive reed; d-3, a third conductive reed.
Detailed Description
In order to make the purpose and technical solution of the present invention clearer and more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1 and figure 2, this water level measuring device includes level bubble 1, the survey pin pole 2, dowel steel 3, fine motion adjusting part 4, level bubble 1 inlays and establishes at 2 tops of survey pin pole, whether real-time vertical downwards for feeding back the survey pin pole, in the river/before the water level is read to the mark zero point in the hydraulic physics model test, whether the survey pin pole should be examined vertically all, dowel steel 3 consolidates as an organic whole with 4 upper portions of fine motion adjusting part, if the inside three screw rod adjusting part of 3 lower extreme fine motion adjusting part 4 of survey pin pole slope accessible dowel steel adjusts, the height of the steerable perpendicular adjusting screw of screw rod adjusting part and then the inclination of adjusting whole dowel steel 3.
As shown in fig. 1 and fig. 3, a probe rod 2, a conductive spring slide 5, a slide groove 6, a probe sleeve 7-1, a knob 8, and an elastic spring 9, wherein the probe rod 2 is a linear resistor with a fixed resistance made of homogeneous alloy; the probe rod 2 is embedded in the probe sleeve 7-1, and the conductive spring sliding sheet 5 is fixed at the top of the probe sleeve 7-1 and is tightly contacted with the embedded sliding groove 6 of the probe rod;
the knob 8 is fixed on one side of the outer tube of the micro-motion sleeve 7-2, the other end of the knob is meshed with a rack on the outer wall of the probe sleeve through a gear, and micro-lifting is carried out by rotating the knob; the elastic spring leaf 9 is in a hook shape, can have certain elasticity in the process of drawing and pressing the measuring needle rod, and can self-lock the measuring needle sleeve 7-1 and the measuring needle rod in a natural state.
As shown in fig. 1 and 4, a needle bar 2, a connecting rod 10, an insulating member 11, an led lamp 12, a long needle 13, and a short needle 14. The lower end threaded hole of the needle measuring rod 2 is connected with the upper end threaded column of the connecting rod 10, the lower end internal threaded hole of the connecting rod 10 is connected with the upper end external threaded column of the insulating component 11, and the long measuring needle 13 and the short measuring needle 14 are also assembled with the insulating component through a threaded structure. The middle shafts of the probe rod, the connecting rod, the insulating component and the probe are parallel to each other and are tightly connected by a threaded hole at the bottom of the upper component and a threaded column at the top of the lower component to form a component convenient to disassemble; the long stylus 13 is 0.2mm longer than the short stylus 14.
As shown in fig. 5, the micro-motion adjusting assembly 4, the voltage measuring module and power supply device 15, the corner connectors 16, the fixing bracket 17, the voltage measuring module 15 are fixed on the upper portion of the micro-motion adjusting assembly 4, and the four corner connectors are uniformly arranged at the bottom of the micro-motion adjusting assembly 4 and can be fixed on the side wall of the model together with the fixing bracket 17.
As shown in fig. 1 and 7, the dowel bar 3, the micro-motion adjusting assembly 4, the voltage measuring module and the power supply device 15 are provided, the top end of the measuring pin rod is externally connected with a fourth lead L-1, the bottom end of the measuring pin rod is externally connected with a fifth lead L-3, the conductive spring sliding sheet 5 is externally connected with a sixth lead L-2, the size of the voltage measuring module and the power supply device 15 is 10cm × 8cm × 6cm, the voltage measuring module and the power supply device are fixed on the micro-motion adjusting assembly 4 with three adjusting screws, and a second direct current power supply, a voltage measuring module, a third fixed resistor and a second switch are arranged in the voltage measuring module and the power supply device. The positive electrode of the second direct current power supply, the third fixed resistor, the second switch and the positive electrode of the voltage measurement module are sequentially connected through leads, the fourth lead L-1 is connected with the positive electrode of the voltage measurement module, and the fifth lead L-3 is connected with the negative electrode of the second direct current power supply, so that the second direct current power supply, the third fixed resistor, the second switch and the whole probe rod form a series circuit;
the sixth lead L-2 is connected with the negative electrode of the voltage measuring module, the second direct current power supply, the third fixed resistor, the second switch, the voltage measuring module and the parts from the fourth lead L-1 to the sixth lead L-2 of the probe rod form a voltage-dividing sliding circuit in the processes of pumping, pressing and fine-tuning the probe rod, and the voltage measuring module measures the voltage value corresponding to the resistance between the fourth lead L-1 and the sixth lead L-2.
The length of the needle measuring rod can be adjusted, namely the maximum length between the fourth conducting wire L-1 and the sixth conducting wire L-2 is 60cm, and the needle measuring rod needs to be pulled to the highest position L before the water level is measured max =60cm, at this time, the maximum voltage U corresponding to the maximum resistance value included in the fourth conducting wire L-1 and the sixth conducting wire L-2 is the maximum max According to the geometric similarity principle, the level gauge marks the elevation of a prototype at a certain position as H 1 At a voltage of U 1 Deducing the length L according to ohm's law and the conductivity formula 1 =L max ×U 1 /U max Then according to the similar scale lambda H Converting to obtain zero point elevation H 0 =H 1 -L 1 ×λ H . Further pass U in the experiment Measuring /U max =L Measuring /L max The prototype water level is calculated to be H Measuring =H 0 +U Measuring /U max ×L max ×λ H 。
Fig. 4, 6 and 7 show the insulating member 11, the led lamp 12, the long probe 13, the short probe 14, the first fixed resistor 18, and the probe cylinder conducting strip 19. The long measuring pin 13 is slightly longer by about 0.2mm than the short measuring pin 14, the size of the insulating component 11 is 3cm multiplied by 2cm multiplied by 6cm, a first direct current power supply, a second fixed resistor, a first switch, a first fixed resistor 18, an LED lamp 12,3 conductive reeds are arranged in the insulating component, a third conductive reed D-3 is respectively positioned on the right side of the top end of the long measuring pin, the second conductive reeds D-2 and the first conductive reed D-1 on the left side and the right side of the top end of the short measuring pin, and the LED lamp 12 and the first fixed resistor 18 are arranged in the middle of the two measuring pins and are connected with the second conductive reed D-2 and the third conductive reed D-3 through leads; the conductive strip 19 of the needle measuring cylinder is vertically attached to the whole needle measuring cylinder along the tube wall and is connected to the negative electrode of the first direct current power supply in the insulating member 11 by a lead. The positive electrode of the first direct current power supply is connected with the first switch through the second fixed resistor and the first switch through a lead and a first conductive spring piece D-1 on the right side of the top end of the short measuring pin. Therefore, when the switch is closed and the long measuring pin is just contacted with the water surface in the measuring pin adjusting process, the short measuring pin is positioned above the water surface, a closed circuit is formed by the first direct current power supply, the second fixed resistor, the first switch, the LED lamp 12, the first fixed resistor 18, the long measuring pin, the water surface and the measuring pin barrel conducting strip 19, and the LED lamp 12 emits light at the moment.
When the probe rod is continuously adjusted downwards, the short probe contacts with the water surface, the first direct current power supply, the second fixed resistor, the first switch, the short probe 14, the water surface and the probe cylinder conducting strip 19 form a closed circuit, and at the moment, because the resistance value of the short probe 14 and the water surface is small and is almost 0, the resistance values of the LED lamp 12, the first fixed resistor 18 and the long probe 13 are relatively large, the LED lamp 12 is short-circuited and is not bright.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. Within the scope of the principles and technical ideas of the present invention, it is within the scope of the present invention to carry out various changes, modifications, substitutions and alterations to the embodiments.
Claims (7)
1. A water level measuring apparatus for automatically recognizing a liquid level for a physical model of river/water works, comprising:
the needle measuring rod is a linear resistor which is made of alloy and has a fixed resistance value, the top is embedded with a leveling bubble,
the probe sleeve is coaxially and fixedly sleeved at the bottom end of the probe rod, and a vertically arranged rack is arranged on the outer wall of the probe sleeve;
the fine adjustment sleeve is coaxially sleeved outside the probe sleeve, a through hole is formed in the outer wall of the fine adjustment sleeve, one end of a transmission rod extends into a space between the micro-motion sleeve and the probe sleeve through the through hole and then is in transmission connection with the rack through a transmission gear, one end of the transmission rod, which is located on the outer side of the micro-motion sleeve, is connected with a knob, and the probe sleeve is enabled to slightly lift relative to the fine adjustment sleeve through rotation of the knob;
the conductive spring sliding sheet is fixed at the top of the probe sleeve, a sliding groove is formed in the side edge of the probe rod, and the conductive spring sliding sheet is in close contact with the sliding groove;
the lower end of the needle measuring rod is sequentially coaxially and detachably connected with a connecting rod and an insulating member, the bottom end of the insulating member is provided with two vertical and parallel measuring needles which are respectively a long measuring needle and a short measuring needle,
the insulating member embeds circuit original paper, includes: a first DC power supply, a second fixed resistor, a first switch, an LED lamp and a first fixed resistor, wherein,
the upper end of the long measuring pin is connected with the LED lamp and the first fixed resistor (18) in series in sequence through a first lead and then is connected with the upper end of the short measuring pin;
the positive electrode of the first direct current power supply is sequentially connected with a second fixed resistor and a first switch in series through a second lead and then connected with the upper end of the short measuring pin;
the needle measuring cylinder is arranged at the lower ends of the two needle measuring cylinders, the long needle measuring cylinder can contact the liquid level in the needle measuring cylinder, and the short needle measuring cylinder is not contacted with the liquid level in the needle measuring cylinder; a needle measuring cylinder conducting strip is arranged on the cylinder wall of the needle measuring cylinder and is connected with the negative electrode of the first direct current power supply through a third conducting wire to form a liquid level automatic identification device, and the LED lamp is turned on at the moment;
voltage measurement module and power supply unit includes: the positive electrode of the second direct current power supply, the third fixed resistor, the second switch and the positive electrode of the voltage measuring module are sequentially connected through a wire;
one end of the fourth conducting wire is connected with the top end of the needle measuring rod, and the other end of the fourth conducting wire is connected with the positive electrode of the voltage measuring module;
one end of the fifth lead is connected with the bottom end of the probe rod, and the other end of the fifth lead is connected with the negative electrode of the second direct current power supply, so that the second direct current power supply, the second fixed resistor, the second switch and the whole probe rod form a series circuit;
and one end of the sixth lead is connected with the conductive spring sliding sheet, the other end of the sixth lead is connected with the negative electrode of the voltage measuring module, the second direct current power supply, the second fixed resistor, the second switch, the voltage measuring module and the measuring pin rod form a partial voltage type sliding circuit in the processes of drawing, pressing and fine-tuning the measuring pin rod, and the voltage measuring module measures the voltage value corresponding to the resistor between the fourth lead and the sixth lead.
2. The water level measuring apparatus for automatically recognizing a liquid level of a river/hydraulic physical model according to claim 1, wherein the lengths of the long pin and the short pin are different by 0.2mm.
3. The apparatus for measuring a water level according to claim 1, further comprising a deviation rectifying module provided at one side of the stylus rod for adjusting the stylus rod to a vertical state, comprising:
the fixed bracket is fixed on the side wall of the river work/hydraulic work physical model;
the micro-motion adjusting assembly is arranged on the fixed support and comprises an upper top plate, a lower cushion plate and a plurality of vertical micro-adjusting units connected between the upper top plate and the lower cushion plate;
the upper top plate is connected with the fine adjustment sleeve through a dowel bar.
4. The apparatus of claim 3, wherein the voltage measuring module and the power supply apparatus are disposed on the upper top plate.
5. The water level measuring apparatus for the automatic recognition of the liquid level of a river/hydraulic physical model according to claim 3, wherein the vertical fine tuning unit is a screw adjustment assembly.
6. The water level measuring device for the automatic recognition of the liquid level for the physical river/hydraulic model as claimed in claim 3, wherein the fixing bracket is an L-shaped bracket, and the voltage measuring module and the power supply device are fixed on the short side of the L-shaped bracket by corner codes;
the needle measuring cylinder is vertically fixed on the long edge of the L-shaped bracket.
7. The water level measuring device for automatically recognizing the liquid level according to claim 1, wherein an elastic spring is fixedly installed on an inner wall of the probe sleeve, and the elastic spring is in a hook shape and has a certain elasticity in a process of drawing and pressing the probe rod, so that the probe sleeve and the probe rod are naturally self-locked.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222374026.5U CN218584145U (en) | 2022-09-07 | 2022-09-07 | Water level measuring device for automatically identifying liquid level for river/hydraulic physical model |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222374026.5U CN218584145U (en) | 2022-09-07 | 2022-09-07 | Water level measuring device for automatically identifying liquid level for river/hydraulic physical model |
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| CN218584145U true CN218584145U (en) | 2023-03-07 |
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| CN202222374026.5U Active CN218584145U (en) | 2022-09-07 | 2022-09-07 | Water level measuring device for automatically identifying liquid level for river/hydraulic physical model |
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2022
- 2022-09-07 CN CN202222374026.5U patent/CN218584145U/en active Active
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