CN209432347U - A kind of flow type micro-pressure sensor calibration equipment - Google Patents
A kind of flow type micro-pressure sensor calibration equipment Download PDFInfo
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- CN209432347U CN209432347U CN201920326646.7U CN201920326646U CN209432347U CN 209432347 U CN209432347 U CN 209432347U CN 201920326646 U CN201920326646 U CN 201920326646U CN 209432347 U CN209432347 U CN 209432347U
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Abstract
The utility model relates to field of pressure measurement more particularly to a kind of flow type micro-pressure sensor calibration equipments comprising cabinet adjusts flowmeter, built-in micro-pressure sensor, relief valve, master control borad, display screen and four-way connection；Cabinet side offers constant air pressure air inlet, sensor to be measured connects port, signal output interface and power interface；The inlet end for adjusting flowmeter is equipped with the snorkel for being connected to constant air pressure air inlet；Four interfaces of four-way connection are separately connected and adjust the outlet side of flowmeter, built-in micro-pressure sensor, sensor to be measured connect port and relief valve；The signal input part of master control borad is connected to the signal output end of built-in micro-pressure sensor, and the signal output end of master control borad is connected to signal output interface and display screen signal input terminal；The power end of master control borad is connected to power interface.The problem of the utility model can not be verified for solution circulation formula pressure sensor, stabilized speed is fast, and checking precision is high.
Description
Technical field
The utility model relates to field of pressure measurement more particularly to a kind of flow type micro-pressure sensor calibration equipments.
Background technique
Mainly by metering and industrial both direction, metering industry is verified the application industry of differential pressure tester using differential pressure
Instrument is to stablize the method for static pressure measurement as differential pressure standard, common differential pressure tester principle, can not carry out circulation and decline
Differential pressure pick-up verification, while there is a problem of stablizing what the time was grown for the non-negotiable differential pressure pick-up that declines；
In consideration of it, to overcome drawbacks described above, providing a kind of flow type micro-pressure sensor calibration equipment becomes this field urgently
Problem to be solved.
Summary of the invention
The purpose of this utility model is to provide for a kind of flow type micro-pressure sensor calibration equipment, is used for solution circulation
The problem of formula pressure sensor can not verify, stabilized speed is fast, and checking precision is high.
In order to solve the above technical problems, a kind of the technical solution of the utility model are as follows: flow type micro-pressure sensor verification
Device, including cabinet, adjusting flowmeter, built-in micro-pressure sensor, relief valve, master control borad, display screen and four-way connection；Its
In, the adjusting flowmeter, relief valve and display screen are embedded at case side wall, the built-in micro-pressure sensor, master control borad
It is set in cabinet with four-way connection；The cabinet side offers constant air pressure air inlet, sensor to be measured connects port, signal
Output interface and power interface；The inlet end for adjusting flowmeter is equipped with the ventilation for being connected to the constant air pressure air inlet
Pipe；Four interfaces of the four-way connection are connected separately with the first branch pipe, the second branch pipe, third branch pipe and the 4th branch pipe；It is described
First branch pipe is connected to the outlet side for adjusting flowmeter, and second branch pipe is connected to built-in micro-pressure sensor, described
Third branch pipe is connected to the sensor to be measured and connects port, and the 4th branch pipe is connected to relief valve；The signal of the master control borad
Input terminal is connected to the signal output end of built-in micro-pressure sensor, and the signal output end of the master control borad is connected to signal output
Interface and display screen signal input terminal；The power end of the master control borad is connected to power interface.
By above scheme, the adjusting flow is calculated as spinner flowmeter；Specially band valve rotor flowmeter, adjusts flowmeter
Display surface towards on the outside of cabinet, can intuitively show flow measuring data, more accurately.
By above scheme, the built-in micro-pressure sensor is 166 micro-pressure sensor of model Alpha；The model
Sensor be high-precision micro-pressure sensor, be affected by temperature it is small, have good stability and stability, further increase to
The accuracy of micrometer differential pressure pickup verification.
By above scheme, the relief valve is needle-like relief valve, and pressure release precision is high.
By above scheme, the master control borad includes power supply unit, main control unit and display unit；The letter of the power supply unit
Number input terminal is connected to the power interface, and the signal output end of the power supply unit connects built-in micro-pressure sensor, master control
The power end of unit and display unit, the signal that the signal input part of the main control unit is connected to built-in micro-pressure sensor are defeated
Outlet, the signal output end of the main control unit are connected to signal output interface, and the display unit is connected to main control unit, institute
The signal output end for stating display unit is connected to display screen.
By above scheme, the power supply unit includes the first voltage for 220V alternating current to be converted to 24V direct current
Converting unit and second voltage converting unit for 24V direct current to be converted to 5V direct current, the first voltage conversion are single
The input terminal of member is connected to power interface, the output end of the first voltage converting unit be connected to built-in micro-pressure sensor and
The input terminal of the power end of main control unit, the second voltage converting unit is connected to the output end of first voltage converting unit,
The output end of the second voltage converting unit is connected to the power end of display unit；First voltage converting unit is used for built-in
Micro-pressure sensor and main control unit provide 24V operating voltage, and second voltage converting unit is used to provide 5V work to display unit
Make voltage.
By above scheme, the main control unit and display unit are all made of the single-chip microcontroller of model STC12C5A60S2.
The utility model has the beneficial effects that
The utility model inputs constant air pressure source by external air compressor, by adjusting relief valve with flowmeter come smart
Really control and generation pressure, built-in micro-pressure sensor and sensor to be measured are all connected to four-way connection, built-in micro-pressure-difference sensing
The collected differential pressure signal of device is input to after master control borad shows real-time pressure value on a display screen, to supply as reference pressure value
Metrological personnel and the comparison of micro-pressure sensor to be measured reading or reference are for verification；The utility model can carry out flow type and non-streaming
The verification of the little differential pressure sensor of general formula, by adjusting needle-like relief valve, pressure occurrence value can be pressed by atmospheric pressure moment trim
Power occurs speed and is exceedingly fast, and possesses that stabilized speed is fast, precision is high, the characteristics of being readily produced.
Detailed description of the invention
Fig. 1 is the utility model embodiment overall structure block diagram；
Fig. 2 is the utility model embodiment overall structure diagram；
Fig. 3 is the positive structure schematic of Fig. 2；
Fig. 4 is the schematic diagram of internal structure of Fig. 2；
Fig. 5 is the circuit diagram of second voltage converting unit in the present embodiment.
Appended drawing reference:
1, cabinet；101, constant air pressure air inlet；102, sensor to be measured connects port；103, signal output interface；104,
Power interface；
2, flowmeter is adjusted；201, snorkel；
3, built-in micro-pressure sensor；
4, relief valve；
5, master control borad；501, power supply unit；501a, first voltage converting unit；501b, second voltage converting unit；
502, main control unit；503, display unit；
6, display screen；
7, four-way connection；701, the first branch pipe；702, the second branch pipe；703, third branch pipe；704, the 4th branch pipe.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to the accompanying drawing and specifically
Embodiment is described in further detail the utility model.
Fig. 1 to Fig. 5 is please referred to, the utility model is a kind of flow type micro-pressure sensor calibration equipment comprising cabinet
1, flowmeter 2, built-in micro-pressure sensor 3, relief valve 4, master control borad 5, display screen 6 and four-way connection 7 are adjusted；Wherein, described
It adjusts flowmeter 2, relief valve 4 and display screen 6 and is embedded at 1 side wall of cabinet, the built-in micro-pressure sensor 3,5 and of master control borad
Four-way connection 7 is set in cabinet 1.
1 side of cabinet offers constant air pressure air inlet 101 combined with Figure 1 and Figure 2, sensor to be measured connects port 102, letter
Number output interface 103 and power interface 104；Constant air pressure air inlet 101 inputs constant air pressure source for external air compressor,
It is defeated for external flow type to be verified or the micro-pressure sensor of non-streaming general formula, the signal that sensor to be measured connects port 102
Outgoing interface 103 is used for external monitoring outlay, and the power interface 104 is used for external 220V alternating current.
Adjusting flowmeter 2 is band valve rotor flowmeter, and the inlet end for adjusting flowmeter 2 is equipped with snorkel 201, adjusts flow
The inlet end of meter 2 is connected to constant air pressure air inlet 101 by snorkel 201 and obtains constant air pressure source.
Four interfaces of four-way connection 7 are connected separately with the first branch pipe 701, the second branch pipe 702, third branch pipe 703 and
Four branch pipes 704；First branch pipe 701 is connected to the outlet side for adjusting flowmeter 2, and the second branch pipe 702 is connected to built-in micro-pressure-difference and passes
Sensor 3, third branch pipe 703 are connected to sensor to be measured and connect port 102, and the 4th branch pipe 704 is connected to relief valve 4.The present embodiment
In, snorkel 201, the first branch pipe 701, the second branch pipe 702, third branch pipe 703 and the 4th branch pipe 704 are plastic flexible pipe, interior
Setting micro-pressure sensor 3 is 166 micro-pressure sensor of model Alpha；Relief valve 4 is needle-like relief valve 4.
The signal input part of master control borad 5 is connected to the signal output end of built-in micro-pressure sensor 3, the signal of master control borad 5
Output end is connected to 6 signal input part of signal output interface 103 and display screen；The power end of master control borad 5 is connected to power interface
104。
Master control borad 5 includes power supply unit 501, main control unit 502 and display unit 503；The signal of power supply unit 501 inputs
End is connected to power interface 104 and obtains 220V alternating current, and the signal output end of power supply unit 501 connects built-in micro-pressure sensor
3, the power end of main control unit 502 and display unit 503；Power supply unit 501 includes straight for 220V alternating current to be converted to 24V
The first voltage converting unit 501a of galvanic electricity and second voltage converting unit for 24V direct current to be converted to 5V direct current
501b, the input terminal of first voltage converting unit 501a are connected to the output of 104 first voltage converting unit 501a of power interface
End is connected to the power end of built-in micro-pressure sensor 3 and main control unit 502, and first voltage converting unit 501a is for obtaining
220V alternating current and 220V alternating current is converted to 24V direct current is that built-in micro-pressure sensor 3 and main control unit 502 provide work
Make voltage, in the present embodiment, first voltage converting unit 501a is 24V Switching Power Supply, specially NES-35-24 Switching Power Supply,
220V alternating current steadily can be switched to very accurate 24V voltage by 24V Switching Power Supply, and positive and negative to be no more than 0.5V, accuracy is high,
Stability is good；The input terminal of second voltage converting unit 501b is connected to the output end of first voltage converting unit 501a, and second
The output end of voltage conversion unit 501b is connected to the power end of display unit 503；Second voltage converting unit 501b is used for will
It is that display unit 503 provides operating voltage, the specific electricity of second voltage converting unit 501b that 24V direct current, which is converted to 5V direct current,
Road figure mainly uses ZY2405UHBD-5W power module refering to Fig. 5, and J-24V-IN is docked to the V+ of NES-35-24 Switching Power Supply
And V-, J-5V, that is, 5V voltage output end and display unit 503 provide 5V voltage.
The signal input part of main control unit 502 is connected to the signal output end of built-in micro-pressure sensor 3, main control unit
502 signal output end is connected to signal output interface 103, and display unit 503 is connected to main control unit 502, display unit 503
Signal output end be connected to the signal that display screen 6 detects built-in micro-pressure sensor 3 and show；502 He of main control unit
Display unit 503 is all made of the single-chip microcontroller of model STC12C5A60S2.
The specific operation process of the utility model are as follows: air compressor obtains the compressed air of enough volumes, by rotor stream
Meter accurately controls the slow release of compressed air, and above procedure is referred to as first order pressure stabilizing, this process switchs to pressure-air
Minute-pressure air (pressure reference is placed the atmosphere in environment by instrument during this)；Air after pressure stabilizing is equal by four-way connection 7
It is divided into 3 parts and built-in little differential pressure sensor, needle is averagely delivered to by the second branch pipe 702, third branch pipe 703 and the 4th branch pipe 704
Type relief valve 4 and external micro-pressure sensor to be detected；Air after pressure stabilizing is slowly discharged into atmosphere by needle-like relief valve 4
In, wherein the effect of needle-like relief valve 4 is second level pressure stabilizing, because the gas flow after first order pressure stabilizing is stablized, passes through metering needle
Type relief valve 4 can be accurately adjusted burst size of the minute-pressure air into atmosphere, and make to control gas pressure in atmospheric equilibrium pipeline
Speed and flowmeter input pressure speed difference, therefore the middle part of device be stablize adjustable pressure；What calibration equipment occurred
Minute-pressure scalar is the pressure difference after pressure and second level pressure stabilizing after first order pressure stabilizing, and the generation of this pressure difference is based on two-way minute-pressure
It and is to balance, therefore the pressure generated is stable and continues with atmospheric pressure；By adjusting needle-like relief valve 4, pressure occurrence value can quilt
Atmospheric pressure moment trim, pressure occur speed and are exceedingly fast.
The built-in collected differential pressure signal of micro-pressure sensor can directly input master control borad 5, and show reality on display screen 6
When pressure value, using as reference pressure value for metrological personnel and micro-pressure sensor to be measured reading comparison or reference；Signal can also
Enough communicated by signal output interface 103 with external equipment；Metrological personnel only needs to adjust spinner flowmeter control range
Flow in range, controlling pressure occurrence value with needle-like relief valve 4 can be completed whole pressure checkings operations.
The above content is combine specific embodiment further detailed description of the utility model, and it cannot be said that
The specific implementation of the utility model is only limited to these instructions.For the utility model person of an ordinary skill in the technical field
For, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, all should be considered as belonging to
In the protection scope of the utility model.
Claims (7)
1. a kind of flow type micro-pressure sensor calibration equipment, it is characterised in that: including cabinet (1), adjust flowmeter (2), interior
Set micro-pressure sensor (3), relief valve (4), master control borad (5), display screen (6) and four-way connection (7)；Wherein, the adjusting stream
Meter (2), relief valve (4) and display screen (6) are embedded at cabinet (1) side wall, the built-in micro-pressure sensor (3), master control
Plate (5) and four-way connection (7) are set in cabinet (1)；
Cabinet (1) side offers constant air pressure air inlet (101), sensor to be measured connects port (102), signal output connects
Mouth (103) and power interface (104)；
The inlet end for adjusting flowmeter (2) is equipped with the snorkel (201) for being connected to the constant air pressure air inlet (101)；
Four interfaces of the four-way connection (7) are connected separately with the first branch pipe (701), the second branch pipe (702), third branch pipe
(703) and the 4th branch pipe (704)；First branch pipe (701) is connected to the outlet side for adjusting flowmeter (2), and described the
Two branch pipes (702) are connected to built-in micro-pressure sensor (3), and the third branch pipe (703) is connected to the sensor to be measured and connects
Port (102), the 4th branch pipe (704) are connected to relief valve (4)；
The signal input part of the master control borad (5) is connected to the signal output end of built-in micro-pressure sensor (3), the master control borad
(5) signal output end is connected to signal output interface (103) and display screen (6) signal input part；The electricity of the master control borad (5)
Source is connected to power interface (104).
2. a kind of flow type micro-pressure sensor calibration equipment according to claim 1, it is characterised in that: the adjusting stream
Meter (2) is spinner flowmeter.
3. a kind of flow type micro-pressure sensor calibration equipment according to claim 1, it is characterised in that: described built-in micro-
Differential pressure pickup (3) is 166 micro-pressure sensor of model Alpha.
4. a kind of flow type micro-pressure sensor calibration equipment according to claim 1, it is characterised in that: the relief valve
(4) it is needle-like relief valve (4).
5. a kind of flow type micro-pressure sensor calibration equipment according to claim 1, it is characterised in that: the master control borad
It (5) include power supply unit (501), main control unit (502) and display unit (503)；The signal of the power supply unit (501) inputs
End is connected to the power interface (104), and the signal output end of the power supply unit (501) connects built-in micro-pressure sensor
(3), the signal input part of the power end of main control unit (502) and display unit (503), the main control unit (502) is connected to
The signal output end of built-in micro-pressure sensor (3), the signal output end of the main control unit (502) are connected to signal output and connect
Mouth (103), the display unit (503) are connected to main control unit (502), and the signal output end of the display unit (503) connects
It is connected to display screen (6).
6. a kind of flow type micro-pressure sensor calibration equipment according to claim 5, it is characterised in that: the power supply list
First (501) include first voltage converting unit (501a) for 220V alternating current to be converted to 24V direct current and for by 24V
Direct current is converted to the second voltage converting unit (501b) of 5V direct current, the input of the first voltage converting unit (501a)
End is connected to power interface (104), and the output end of the first voltage converting unit (501a) is connected to built-in micro-pressure-difference sensing
The input terminal of the power end of device (3) and main control unit (502), the second voltage converting unit (501b) is connected to first voltage
The output end of the output end of converting unit (501a), the second voltage converting unit (501b) is connected to display unit (503)
Power end.
7. a kind of flow type micro-pressure sensor calibration equipment according to claim 5, it is characterised in that: the master control list
First (502) and display unit (503) are all made of the single-chip microcontroller of model STC12C5A60S2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920326646.7U CN209432347U (en) | 2019-03-14 | 2019-03-14 | A kind of flow type micro-pressure sensor calibration equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920326646.7U CN209432347U (en) | 2019-03-14 | 2019-03-14 | A kind of flow type micro-pressure sensor calibration equipment |
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| CN209432347U true CN209432347U (en) | 2019-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693211A (en) * | 2020-07-10 | 2020-09-22 | 浙江中乾计量校准有限公司 | Micro-pressure difference calibrator |
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2019
- 2019-03-14 CN CN201920326646.7U patent/CN209432347U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693211A (en) * | 2020-07-10 | 2020-09-22 | 浙江中乾计量校准有限公司 | Micro-pressure difference calibrator |
| CN111693211B (en) * | 2020-07-10 | 2021-05-28 | 浙江中乾计量校准有限公司 | Micro-pressure difference calibrator |
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