CN103017970A - Balanced type water pressure sensor and testing method thereof - Google Patents

Balanced type water pressure sensor and testing method thereof Download PDF

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Publication number
CN103017970A
CN103017970A CN2012105043377A CN201210504337A CN103017970A CN 103017970 A CN103017970 A CN 103017970A CN 2012105043377 A CN2012105043377 A CN 2012105043377A CN 201210504337 A CN201210504337 A CN 201210504337A CN 103017970 A CN103017970 A CN 103017970A
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water
pressure
water pressure
pressure sensor
pedestal
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CN103017970B (en
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汪哲荪
汤临春
张文瀚
黄毅
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Hefei University of Technology
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Hefei University of Technology
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Abstract

The invention discloses a balanced type water pressure sensor and a testing method of the balanced type water pressure sensor, wherein the balanced type water pressure sensor comprises an A sensing device, a B sensing device, a base and a slag settler; under the control of a water pressure tester, the A sensing device of the balanced type water pressure sensor is used for testing a main body water depth pressure of a part free from water level variation, and the main body water depth pressure is taken as a control value to exert a balance pressure on a B water pressure sensor by a balance pressure gauge of the B sensing device; the B water pressure sensor, under the balance of the control pressure in the B water pressure sensor, is used for detecting the rest water depth pressure of a part with water level variation; and the main body pressure is added with the rest pressure by the water pressure tester, to obtain the tested deep water pressure. The balanced type water pressure sensor disclosed by the invention, while widening the measurement range, improves the testing precision, and has the characteristics of being simple and compact in structure, easy to install and capable of displaying data in real time; and a new instrument apparatus is provided for testing the deep water pressure with high precision.

Description

Balanced type water pressure sensor and method of testing thereof
Technical field
The present invention relates to a kind of sensor of measuring deep-water pressure, specifically a kind of balanced type water pressure sensor and method of testing thereof.
Background technology
At present, usually adopt the proving installations such as piezometric tube device, conventional water pressure sensor to come test water pressure.Those devices be not be simply equipped, bulky and artificial visually examine's reading, be exactly in order to ensure measuring accuracy, can only test the water pressure of the low depth of water, so restricted on using.
Summary of the invention
For the deficiency of existing water pressure proving installation and sensor, the present invention proposes a kind of balanced type water pressure sensor and method of testing thereof, and it can be under the prerequisite that satisfies the high precision measurement requirement, and wide range ground carries out the test of deep-water pressure.
Technical solution problem of the present invention adopts following technical scheme:
A kind of balanced type water pressure sensor, it is characterized in that: in the through hole of tank base plate, testing tube is installed, this testing tube water inlet is mounted with filtering screen, and the testing tube water outlet is connected with an end of electromagnetic valve, and the other end of electromagnetic valve is connected with residue deposition device; Same level height on described residue deposition device lateral wall top is provided with A pedestal and B pedestal, two through holes on the residue deposition device sidewall respectively with A pedestal and B pedestal in pipeline communication; The bottom surface of described A pedestal is mounted with vertical A sensing device, and the side of A pedestal is mounted with the A vent valve; The bottom surface of described B pedestal is mounted with vertical B sensing device, and the side of B pedestal is mounted with the B vent valve; Tested water flows into from testing tube in the described tank, through electromagnetic valve, residue deposition device, arrives A sensing device and A vent valve by the A pedestal, and the B water pressure sensor and the B vent valve that arrive the B sensing device by the B pedestal; Slag-drip opening is arranged at described residue deposition device bottom, and described A sensing device is conventional water pressure sensor.
Described balanced type water pressure sensor, it is characterized in that: described B sensing device is made of B water pressure sensor and balance pressure device, the B water pressure sensor is parallel with the axis of equalized pressure device, the side bolt of equalized pressure device casing is fixed in the side of B water pressure sensor support, and the through hole on the casing of equalized pressure device pressure pocket position docks with through hole on the support of B water pressure sensor modulator position.
Described balanced type water pressure sensor is characterized in that: on the transversal section in the described equalized pressure device casing dividing plate is arranged, the top of this dividing plate is pressure pocket, and the bottom of dividing plate is working chamber, and the chassis backplane bottom surface is mounted with servomotor along the axis; The main shaft of described servomotor passes bottom center hole and enters and be connected with one-way driving mechanism in the casing, and the connecting link of this one-way driving mechanism is articulated in piston; There is through hole at center at described dividing plate, is mounted with governor valve on this hole; Rotate servomotor spindle, transmission through one-way driving mechanism, described piston is moved up and down in the casing working chamber, piestic water is flowed into or the outflow pressure pocket from the governor valve of working chamber by the dividing plate center, pass through again the docking duct inflow on the enclosure wall of pressure pocket position or flow out the B water pressure sensor; One through hole is arranged on the enclosure wall at described pressure pocket position in addition, on this through hole water filling port is installed.
Described balanced type water pressure sensor is characterized in that: in the described B water pressure sensor support, along axis direction catch net, Modulated Films, modulator, bonnet are arranged successively; There is the retaining chamber inside of described modulator, and the periphery of modulator panel equidistantly is provided with several apopores, and the duct of docking with the equalized pressure device is arranged on the support wall at modulator position; There is tubaeform sliding pipe at the center of modulator, is provided with modulation coil on the equal diameter section in this sliding pipe outside, in the latter end of sliding pipe braking bolt is arranged; From the piestic water that equalized pressure device docking duct flows to, goes out, through retaining chamber, the panel apopore of modulator, stream acts on the Modulated Films in tubaeform sliding pipe; Described Modulated Films is the shape that the circular membrane central vertical is fixed with an iron core rod, the periphery of circular membrane is fixed in the support wall, the iron core rod is movably placed in the tubaeform sliding pipe of modulator, when circular membrane is straightened condition in the pressure equilibrium of tested water and piestic water as the time spent, the iron core rod just in time is positioned at the position, front end of modulators modulate coil; When tested water during greater than the pressure of piestic water, this circular membrane is close to the tubaeform chute wall of modulator and is made elastic deformation, and moves at the tubaeform sliding pipe of modulator with the iron core rod.
A kind of method of testing of balanced type water pressure sensor is characterized in that carrying out according to the following procedure:
(1) on the tank base plate through hole is set vertically, testing tube is inserted from the aperture on this through hole top, use bolted behind the tank base plate in the testing tube bottom, water inlet placement filter guard at testing tube, water outlet at testing tube is installed electromagnetic valve and residue deposition device, at residue deposition device A pedestal and B pedestal is installed;
(2) the equalized pressure device is installed on the side of B water pressure sensor support, unclamp the braking bolt in the B water pressure sensor modulator, open the lid of equalized pressure device water filling port, inject distilled water from water filling port, until tighten lid after filling with water and draining bubble, then the B sensing device is installed on the B pedestal, and the A sensing device is installed on the A pedestal;
(3) from the testing tube water inlet water filling of tank, through electromagnetic valve, residue deposition device, flow into respectively again A pedestal and B pedestal, open A vent valve, B vent valve on A pedestal and the B pedestal, fasten this two vent valves, again shut electromagnetic valve door after draining bubble;
(4) cable of A sensing device, B sensing device is with after the water pressure tester is connected, and the water pressure tester begins test job.The operating hydraulic pressure force tester transfers to the equalized pressure device state of " zero " Output pressure;
(5) water filling is after setting height in the tank, and the operating hydraulic pressure force tester is opened electromagnetic valve gradually, B water pressure sensor, the equalized pressure device of A sensing device, B sensing device is debugged be duty;
(6) begin to carry out the test of deep-water pressure.Continuous variation along with water level in the tank, demonstrate the main body depth of water pressure values that the SEA LEVEL VARIATION part does not occur the output of A sensing device by the water pressure tester, the residue depth of water pressure values of SEA LEVEL VARIATION part occurs in the output of B water pressure sensor, and with the deep water pressure values of main body pressure with the addition of residue pressure;
(7) be completed, drain the water in the tank, operating hydraulic pressure force tester shut electromagnetic valve door shuts down after the equalized pressure device being transferred to the state of " zero " Output pressure, is the seated preparation of test next time.
Balanced type water pressure sensor of the present invention is based on following principle of work:
Existing conventional water pressure sensor all exists the contradiction of range and precision, will reduce testing range if the raising measuring accuracy means, and is instead then same.In order to test out accurately the deep water pressure of wide range, the present invention adopts the method for A sensing device and the combination of B sensing device to finish.The depth of water H of known deep water is by the main body depth of water h that SEA LEVEL VARIATION does not occur 1With the residue depth of water h that SEA LEVEL VARIATION occurs 2Form, i.e. H=h 1+ h 2Control (distinguishing the depth of water pressure that the SEA LEVEL VARIATION part does not occur or the SEA LEVEL VARIATION part occurs) through the water pressure tester tests out main body depth of water h by the A sensing device 1Main body pressure p 1(be p 1=γ h 1), and the B water pressure sensor is applied the controlling value of equalized pressure p ' as the equalized pressure device of B sensing device, B water pressure sensor inside be subject to evener pressure pressure p ' balance, test out and remove main body pressure p 1The residue pressure p of the rear depth of water 2(be p 2=γ h 2), draw deep water pressure p, i.e. p=p by the pressure addition that A sensing device and B sensing device is measured of water pressure tester again 1+ p 2
The principle of work of A sensing device: the A sensing device is the conventional water pressure sensor such as pressure sensitive, strain-type, condenser type, Hall-type, select its specifications and models by range and the resolution (as by decimetre, the centimetre-sized depth of water etc.) of setting the depth of water, measured water signal inputs to the water pressure tester, through differentiation and the selection of water pressure tester, demonstrate the depth of water main body pressure p that the SEA LEVEL VARIATION part does not occur 1, and with depth of water main body pressure p 1Export to the equalized pressure device of B sensing device as control signal, by the equalized pressure device B water pressure sensor is applied equalized pressure p ' again.
Equalized pressure device principle of work: the equalized pressure device of B sensing device, take the servomotor that is subjected to water pressure tester control as power, through the one-way driving mechanism transmission, make piston in the working chamber by one-dimensional square to movement, the piestic water of generation provides equalized pressure for the Modulated Films of B water pressure sensor.When water level in the tank raise to change, the piston in the working chamber was in the situation that keep equalized pressure to draw back, and made the bar magnet on the B water pressure sensor Modulated Films mobile in the modulation coil; When water level in the tank reduce to change, the piston in the working chamber was in the situation that keep equalized pressure to march forward, and made the bar magnet on the B water pressure sensor Modulated Films mobile outside modulation coil.
B water pressure sensor principle of work: the front end of the B water pressure sensor of B sensing device is provided with Modulated Films, the circular membrane medial surface central vertical of Modulated Films is fixed with an iron core rod, this iron core rod is movably placed in the tubaeform sliding pipe of modulator, is provided with modulation coil on the equal diameter section in the modulator sliding pipe outside.Behind modulation coil incoming transport field power supply, when circular membrane at tested water p 1With the pressure equilibrium effect of piestic water p ' (be p 1=p ') is straightened condition the time, the iron core rod just in time is positioned at the position, front end of modulators modulate coil, the alternating flux φ that produces in the modulation coil is zero (φ=0), the alternating current impression electromotive force E that produces in the modulation coil is zero (E=0), and then the signal delta U of modulation coil output is zero (Δ U=0); As tested water p 1Pressure greater than piestic water p ' (is p 1>p ') time, this circular membrane is close to the tubaeform slideway inwall of modulator and is made elastic deformation, and move at the tubaeform sliding pipe of modulator with the iron core rod, entered in the modulation coil, produced alternating flux φ (φ>0) in the modulation coil, just produced alternating current impression electromotive force E(E>0 in the modulation coil), then modulation coil has been exported signal delta U (Δ U>0); Along with, rising and the reduction of water level in the tank, drive circular membrane and make elastic deformation, the movement that makes the iron core rod in modulation coil, advance or go out, the alternating flux φ that produces in the modulation coil becomes large or diminishes, just the alternating current impression electromotive force E that produces in the modulation coil becomes large or diminishes, and then the signal delta U of modulation coil output becomes large or diminishes, thereby has reached the purpose of water level signal sensing.
Compared with the prior art, beneficial effect of the present invention is embodied in:
Balanced type water pressure sensor of the present invention can improve measuring accuracy in range extension, have simple structure, compact conformation, the easy characteristics of installing, can show in real time data, provides new instrument and equipment for testing accurately deep-water pressure.
Description of drawings
Figure 1A be balanced type water pressure sensor of the present invention just analyse and observe scheme of installation.
Figure 1B is that the side of balanced type water pressure sensor of the present invention is analysed and observe scheme of installation.
Fig. 1 C is the scheme of installation of looking up of balanced type water pressure sensor of the present invention.
Fig. 2 A is the positive sectional structure schematic diagram of balanced type water pressure sensor of the present invention.
Fig. 2 B is the side sectional structure schematic diagram of balanced type water pressure sensor of the present invention.
Fig. 2 C is the structural representation of looking up of balanced type water pressure sensor of the present invention.
Number in the figure: 1 tested water, 2 tank base plates, 3 testing tubes, 4 filtering screens, 5 electromagnetic valves, 6 residue deposition devices, 7 slag-drip openings, 8A pedestal, 9A vent valve, 10B pedestal, 11B vent valve, 12A sensing device, 13B sensing device; 21 equalized pressure devices, 22 casings, 23 dividing plates, 24 servomotors, 25 one-way driving mechanisms, 26 connecting links, 27 pistons, 28 working chambers, 29 governor valves, 30 pressure pockets, 31 docking ducts, 32 water filling ports, 33 piestic waters; 41B water pressure sensor, 42 supports, 43 catch nets, 44 Modulated Films, 45 iron cores rod, 46 modulators, retaining chambers 47,48 apopores, 49 tubaeform slideways, 50 modulation coils, 51 braking bolts, 52 bonnets.
Embodiment
Referring to Figure 1A, Figure 1B and Fig. 1 C, balanced type water pressure sensor described in the present embodiment, testing tube 3 is installed in the through hole of tank base plate 2, these testing tube 3 water inlets are mounted with filtering screen 4, testing tube 3 water outlets are connected with an end of electromagnetic valve 5, and the other end of electromagnetic valve 5 is connected with residue deposition device 6; Same level height on described residue deposition device 6 lateral wall tops is provided with A pedestal 8 and B pedestal 10, two through holes on residue deposition device 6 sidewalls respectively with A pedestal 8 and B pedestal 10 in pipeline communication; The bottom surface of A pedestal 8 is mounted with vertical A sensing device 12, and the side of A pedestal 8 is mounted with A vent valve 9; The bottom surface of described B pedestal 10 is mounted with vertical B sensing device 13, and the side of B pedestal 10 is mounted with B vent valve 11; Tested water 1 flows into from testing tube 3 in the described tank, through electromagnetic valve 5, residue deposition device 6, arrives A sensing device 12 and A vent valve 9 by A pedestal 8, and the B water pressure sensor 41 and B vent valve 11 that arrive B sensing device 13 by B pedestal 10; Slag-drip opening 7 is arranged at residue deposition device 6 bottoms, and A sensing device 12 is conventional water pressure sensor.
Referring to Fig. 2 A, Fig. 2 B and Fig. 2 C, the B sensing device 13 of the water pressure sensor of balanced type described in the present embodiment is made of B water pressure sensor and balance pressure device 21, B water pressure sensor 41 is parallel with the axis of equalized pressure device 21, the side bolt of equalized pressure device casing 22 is fixed in the side of B water pressure sensor support 42, and the through hole on the equalized pressure device 21 pressure pockets 30 position casings docks with through hole on the B water pressure sensor 41 modulators 46 position supports 42.
On the transversal section in the equalized pressure device casing 22 dividing plate 23 is arranged, the top of this dividing plate 23 is pressure pocket 30, and the bottom of dividing plate 23 is working chamber 28, and casing 22 base plate bottom surfaces are mounted with servomotor 24 along the axis; The main shaft of described servomotor 24 passes bottom center hole and enters in the casing 22 and be connected with one-way driving mechanism 25, and the connecting link 26 of this one-way driving mechanism 25 is articulated in piston 27; There is through hole at center at described dividing plate 23, is mounted with governor valve 29 on this hole; Rotate servomotor 24 main shafts, transmission through one-way driving mechanism 25, described piston 27 is moved up and down in the working chamber 28 of casing 22, piestic water 33 is flowed into or outflow pressure pocket 30 from the governor valve 29 of working chamber 28 by dividing plate 23 centers, pass through again docking duct 32 inflows on the pressure pocket 30 position enclosure walls or flow out B water pressure sensor 41; On the enclosure wall at described pressure pocket 30 positions, a through hole is arranged in addition, water filling port 32 is installed on this through hole.
In described B water pressure sensor 41 supports 42, along axis direction catch net 43, Modulated Films 44, modulator 46, bonnet 52 are arranged successively; There is retaining chamber 47 inside of described modulator 46, and the periphery of modulator 46 panels equidistantly is provided with several apopores 48, have on the support wall at modulator 46 positions with equalized pressure device 21 dock duct 31; There is tubaeform sliding pipe 49 at the center of modulator 46, is provided with modulation coil 50 on the equal diameter section in these sliding pipe 49 outsides, and braking bolt 51 is arranged in the latter end of sliding pipe 49; From equalized pressure device 21 docking ducts 32 streams into and out of piestic water 33, through retaining chamber 47, the panel apopore 48 of modulator 46, stream acts on the Modulated Films 44 in tubaeform sliding pipe 49; Described Modulated Films 44 is fixed with the shape of an iron core rod 45 for the circular membrane central vertical, the periphery of circular membrane is fixed in the support wall, and iron core rod 45 is movably placed in tubaeform slideway 49 pipes of modulator.When circular membrane is straightened condition in the pressure equilibrium of tested water 1 and piestic water 33 as the time spent, iron core rod 45 just in time is positioned at the position, front end of modulators modulate coil 50; When tested water 1 during greater than the pressure of piestic water 33, this circular membrane is close to tubaeform slideway 49 walls of modulator and is made elastic deformation, and moves at the tubaeform sliding pipe of modulator with iron core rod 45.
The method of testing of balanced type water pressure sensor is characterized in that carrying out according to the following procedure:
(1) on the tank base plate 2 through hole is set vertically, testing tube 3 is inserted from the aperture on this through hole top, use bolted behind tank base plate 2 in testing tube 3 bottoms, water inlet placement filter guard 4 at testing tube 3, water outlet at testing tube 3 is installed electromagnetic valve 5 and residue deposition device 6, at residue deposition device 6 A pedestal 8 and B pedestal 10 is installed;
(2) equalized pressure device 21 is installed on the side of B water pressure sensor support 42, unclamp the braking bolt 51 in the B water pressure sensor modulator, open the lid of equalized pressure device water filling port 32, inject distilled water from water filling port 32, until tighten lid after filling with water and draining bubble, then B sensing device 13 is installed on B pedestal 10, and A sensing device 12 is installed on the A pedestal 8;
(3) from the testing tube 3 water inlet water fillings of tank, through electromagnetic valve 5, residue deposition device 6, flow into respectively again A pedestal 8 and B pedestal 10, open A vent valve 9, B vent valve 11 on A pedestal 8 and the B pedestal 10, fasten this two vent valves after draining bubble, the shut electromagnetic valve door 5 again;
(4) cable of A sensing device 12, B sensing device 13 is with after the water pressure tester is connected, and the water pressure tester begins test job, and the operating hydraulic pressure force tester transfers to equalized pressure device 21 state of " zero " Output pressure;
(5) water filling is after setting height in the tank, and the operating hydraulic pressure force tester is opened solenoid valve gradually, and 5, it is duty that B water pressure sensor 41, the equalized pressure device 21 of A sensing device 12, B sensing device 13 are debugged;
(6) begin to carry out the test of deep-water pressure, continuous variation along with water level in the tank, demonstrate A sensing dress by the water pressure tester, the main body depth of water pressure values of SEA LEVEL VARIATION part does not occur in 12 outputs, the residue depth of water pressure values of SEA LEVEL VARIATION part occurs in 13 outputs of B water pressure sensor, and with the deep water pressure values of main body pressure with the addition of residue pressure.
(7) be completed, drain the water in the tank, operating hydraulic pressure force tester shut electromagnetic valve, 5, shut down after the equalized pressure device being transferred to the state of " zero " Output pressure, be the seated preparation of test next time.
It is upper outside that the decapacitation of described balanced type water pressure sensor is installed on the tank base plate, can also be installed on the sidewall of tank.When the balanced type water pressure sensor is installed on the tank sidewall, at the instrument connection water outlet 90 ° of elbows are installed, other be installed in the tank base plate on identical, as long as guarantee A pedestal and B pedestal at the same level height, just and A sensing device and B sensing device be in vertical state can.
Described A sensing device is the conventional water pressure sensors such as Hall-type, strain-type, piezoresistor type, condenser type.
Tested water 1 is tested object; The effect of tank base plate 2 is testing tubes 3 of installation testing point; The effect of testing tube 3 is that filtering screen 4 is installed in the water inlet, and water outlet is installed electromagnetic valve 5, allows tested water 1 flow into the balanced type water pressure sensor; The effect of filtering screen 4 is to prevent that foreign material from flowing into residue deposition device 6; When being debugging, maintenance balanced type water pressure sensor, the effect of electromagnetic valve 5 cuts off the water supply; The effect of residue deposition device 6 is sediment miscellaneous objects; The effect of slag-drip opening 7 is the foreign material of discharging residue deposition device 6 interior precipitations; The effect of A pedestal 8 is to settle A sensing device 12 and A vent valve 9, and the passage that tested water 1 current are set; The effect of A vent valve 9 is the air of discharging in the A pedestal 8; The effect of B pedestal 10 is to settle B sensing device 13 and B vent valve 11, and the passage that tested water 1 current are set; The effect of B vent valve 11 is the air of discharging in the B pedestal 10; The effect of A sensing device 12 is to test out the main body depth of water pressure that the SEA LEVEL VARIATION part does not occur in the tank; The effect of B sensing device 13 is to allow 21 pairs of B water pressure sensors 41 of equalized pressure device apply equalized pressure, makes B water pressure sensor 41 inside be subject to the balance of equalized pressure device 21 pressure, tests out the residue depth of water pressure that the SEA LEVEL VARIATION part occurs; The effect of equalized pressure device 21 is that the inside to B water pressure sensor 41 applies equalized pressure; The effect of casing 22 is fixedly servomotor 24, one-way driving mechanism 25, piston 27, dividing plate 23 etc., and bolt is fixed in B water pressure sensor 41; The effect of dividing plate 23 is that casing 22 interior separations are split into working chamber 28 and pressure pocket 30, and settles governor valve 29; The effect of servomotor 24 is controlled by the water pressure tester, power is provided for one-way driving mechanism 25; The effect of one-way driving mechanism 25 is to be the unidirectional power of piston 27 transmissions; The effect of connecting link 26 is that one-way driving mechanism 25 is connected with piston 27; The effect of piston 27 is to produce piestic water 33; The effect of working chamber 28 is the spaces to piston 27 activities, and produces piestic water 33; The effect of governor valve 29 is the speed that restriction piestic water 33 flows, and avoids causing because of mutation of water level the destruction of 33 pairs of B water pressure sensor 41 Modulated Films 44 of piestic water; The effect of pressure pocket 30 is to hold to stay piestic water 33, in order to offer the piestic water 33 of B water pressure sensor 41 modulators 46; The effect in docking duct 31 is the passages that dock circulation piestic water 33 for equalized pressure device 21 with B water pressure sensor 41; The effect of water filling port 32 is to balance the pressure pocket of pressure device 21 30 interior injection distilled water; The effect of piestic water 33 is that the Modulated Films 44 for B water pressure sensor 41 provides equilibrant; The effect of B water pressure sensor 41 is to test out the residue depth of water pressure that the SEA LEVEL VARIATION part occurs; The effect of support 42 is to be installed on B pedestal 10, its inner fixedly catch net 43, Modulated Films 44, modulator 46, bonnet 52, and stable equilibrium pressure device 21; The effect of catch net 43 is protection Modulated Films 44; The effect of Modulated Films 44 is to produce elastic deformation, and drives iron core rod 45 in the tubaeform slideway 49 interior movements of modulator 46; The effect of iron core rod 45 is to produce alternating flux φ for modulation coil 50; The effect of modulator 46 is sensings of implementing data-collection, and retaining chamber 47, tubaeform slideway 49, modulation coil 50 and braking bolt 51 are set; The effect of retaining chamber 47 is to hold to stay piestic water 33; The effect of apopore 48 is to allow piestic water 33 turnover, arrives at Modulated Films 44; The effect of tubaeform slideway 49 is to be Modulated Films 44 distortion guiding, and provides slideway for iron core rod 45; The effect of modulation coil 50 is to produce alternating current impression electromotive force E under 45 effects of iron core rod, output transducing signal Δ U; The effect of braking bolt 51 is that B water pressure sensor 41 dispatches from the factory the haulage stage for protecting the braking of Modulated Films 44; The effect of bonnet 52 is the modulators 46 in the protection support 42, and settles cable fixing head;
The performance of balanced type water pressure sensor: range is 0~100m; Resolution is 0.01mm; Precision is ± 0.02mm.

Claims (5)

1. balanced type water pressure sensor, it is characterized in that: in the through hole of tank base plate, testing tube is installed, described testing tube water inlet is mounted with filtering screen, and the testing tube water outlet is connected with an end of electromagnetic valve, and the other end of electromagnetic valve is connected with residue deposition device; Same level height on described residue deposition device lateral wall top is provided with A pedestal and B pedestal, two through holes on the residue deposition device sidewall respectively with A pedestal and B pedestal in pipeline communication; The bottom surface of described A pedestal is mounted with vertical A sensing device, and the side of A pedestal is mounted with the A vent valve; The bottom surface of described B pedestal is mounted with vertical B sensing device, and the side of B pedestal is mounted with the B vent valve; Tested water flows into from testing tube in the described tank, through electromagnetic valve, residue deposition device, arrives A sensing device and A vent valve by the A pedestal, and the B water pressure sensor and the B vent valve that arrive the B sensing device by the B pedestal; Slag-drip opening is arranged at described residue deposition device bottom, and described A sensing device is conventional water pressure sensor.
2. balanced type water pressure sensor according to claim 1, it is characterized in that: described B sensing device is made of B water pressure sensor and balance pressure device, the B water pressure sensor is parallel with the axis of equalized pressure device, the side bolt of equalized pressure device casing is fixed in the side of B water pressure sensor support, and the through hole on the casing of equalized pressure device pressure pocket position docks with through hole on the support of B water pressure sensor modulator position.
3. balanced type water pressure sensor according to claim 2, it is characterized in that: on the transversal section in the described equalized pressure device casing dividing plate is arranged, the top of this dividing plate is pressure pocket, and the bottom of dividing plate is working chamber, and the chassis backplane bottom surface is mounted with servomotor along the axis; The main shaft of described servomotor passes bottom center hole and enters and be connected with one-way driving mechanism in the casing, and the connecting link of this one-way driving mechanism is articulated in piston; There is through hole at center at described dividing plate, is mounted with governor valve on this hole; Rotate servomotor spindle, transmission through one-way driving mechanism, described piston is moved up and down in the casing working chamber, piestic water is flowed into or the outflow pressure pocket from the governor valve of working chamber by the dividing plate center, pass through again the docking duct inflow on the enclosure wall of pressure pocket position or flow out the B water pressure sensor; One through hole is arranged on the enclosure wall at described pressure pocket position in addition, on this through hole water filling port is installed.
4. balanced type water pressure sensor according to claim 2 is characterized in that: in the described B water pressure sensor support, along axis direction catch net, Modulated Films, modulator, bonnet are arranged successively; There is the retaining chamber inside of described modulator, and the periphery of modulator panel equidistantly is provided with several apopores, and the duct of docking with the equalized pressure device is arranged on the support wall at modulator position; There is tubaeform sliding pipe at the center of modulator, is provided with modulation coil on the equal diameter section in this is tubaeform sliding pipe outside, in the latter end of tubaeform sliding pipe braking bolt is arranged; From the piestic water that equalized pressure device docking duct flows to, goes out, through retaining chamber, the panel apopore of modulator, stream acts on the Modulated Films in tubaeform sliding pipe; Described Modulated Films is the shape that the circular membrane central vertical is fixed with an iron core rod, the periphery of circular membrane is fixed on the support wall, the iron core rod is movably placed in the tubaeform sliding pipe of modulator, when circular membrane is straightened condition in the pressure equilibrium of tested water and piestic water as the time spent, the iron core rod just in time is positioned at the position, front end of modulators modulate coil; When tested water during greater than the pressure of piestic water, this circular membrane is close to the tubaeform chute wall of modulator and is made elastic deformation, and moves at the tubaeform sliding pipe of modulator with the iron core rod.
5. a right to use requires the method for testing of 1 described balanced type water pressure sensor, it is characterized in that carrying out according to the following procedure:
(1) on the tank base plate through hole is set vertically, testing tube is inserted from the aperture on this through hole top, use bolted behind the tank base plate in the testing tube bottom, water inlet placement filter guard at testing tube, water outlet at testing tube is installed electromagnetic valve and residue deposition device, at residue deposition device A pedestal and B pedestal is installed;
(2) the equalized pressure device is installed on the side of B water pressure sensor support, unclamp the braking bolt in the B water pressure sensor modulator, open the lid of equalized pressure device water filling port, inject distilled water from water filling port, until tighten lid after filling with water and draining bubble, then the B sensing device is installed on the B pedestal, and the A sensing device is installed on the A pedestal;
(3) from the testing tube water inlet water filling of tank, through electromagnetic valve, residue deposition device, flow into respectively again A pedestal and B pedestal, open A vent valve, B vent valve on A pedestal and the B pedestal, fasten this two vent valves, again shut electromagnetic valve door after draining bubble;
(4) cable of A sensing device, B sensing device is with after the water pressure tester is connected, and the water pressure tester begins test job, and the operating hydraulic pressure force tester transfers to the equalized pressure device state of zero pressure output;
(5) water filling is after setting height in the tank, and the operating hydraulic pressure force tester is opened electromagnetic valve gradually, B water pressure sensor, the equalized pressure device of A sensing device, B sensing device is debugged be duty;
(6) begin to carry out the test of deep-water pressure, continuous variation along with water level in the tank, demonstrate the main body depth of water pressure values that the SEA LEVEL VARIATION part does not occur the output of A sensing device by the water pressure tester, the residue depth of water pressure values of SEA LEVEL VARIATION part occurs in the output of B water pressure sensor, and with the deep water pressure values of main body pressure with the addition of residue pressure;
(7) be completed, drain the water in the tank, operating hydraulic pressure force tester shut electromagnetic valve door shuts down after the equalized pressure device being transferred to the state of zero pressure output, and being that test next time is seated prepares.
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CN108387290A (en) * 2018-02-02 2018-08-10 浙江中林勘察研究股份有限公司 Simple pressure water head measuring instrument
CN108613770A (en) * 2018-05-14 2018-10-02 合肥工业大学 The measurement method of balance pressure sensor and hydraulic pressure and air pressure
CN108896240A (en) * 2018-07-23 2018-11-27 江苏德尔科测控技术有限公司 A kind of mounting bracket of pressure sensor
CN115077692A (en) * 2022-08-22 2022-09-20 山东一唯自动化有限公司 Fluid vibration detection device

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CN115077692A (en) * 2022-08-22 2022-09-20 山东一唯自动化有限公司 Fluid vibration detection device

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