CN115931215B - Pressure sensor calibration system based on dynamic compensation - Google Patents
Pressure sensor calibration system based on dynamic compensation Download PDFInfo
- Publication number
- CN115931215B CN115931215B CN202211451204.8A CN202211451204A CN115931215B CN 115931215 B CN115931215 B CN 115931215B CN 202211451204 A CN202211451204 A CN 202211451204A CN 115931215 B CN115931215 B CN 115931215B
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- flow
- micro
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 69
- 238000000034 method Methods 0.000 claims abstract description 49
- 230000008569 process Effects 0.000 claims abstract description 39
- 238000007599 discharging Methods 0.000 claims abstract description 27
- 230000008859 change Effects 0.000 claims description 41
- 230000009467 reduction Effects 0.000 claims description 13
- 230000006837 decompression Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Measuring Fluid Pressure (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to a pressure sensor calibration system based on dynamic compensation, and belongs to the technical field of pressure sensor calibration; the system comprises an air source valve, a pressure reducing valve, a quick filling valve, a micro-flow air charging regulating valve, a star-entering valve, a quick discharging valve, a micro-flow air discharging regulating valve, an air discharging stop valve, an air tank group, an air charging tank valve, an air discharging tank valve, a filter 1-filter 7, an air source pressure gauge, a pressure reducing pressure gauge and a star-entering pressure gauge; according to different volumes of the satellite storage tanks, the pressure on the satellite is quickly set and dynamically and stably controlled by adopting a scheme of 'quick high-flow pressure charging and discharging plus micro-flow gas dynamic compensation' through coordinated control of each valve, so that a smaller pressure fluctuation range is kept, and the pressure control precision and the pressure calibration working efficiency are improved; the method is used for accurately setting and maintaining the pressure in the satellite system level pressure sensor calibration process, and improves the accuracy and the calibration efficiency of pressure calibration.
Description
Technical Field
The invention belongs to the technical field of pressure sensor calibration, and relates to a pressure sensor calibration system based on dynamic compensation.
Background
Satellites having propulsion orbital transfer functions are typically configured with propulsion systems. The amount of propulsion fuel remaining during the satellite's orbit is measured by the propulsion system's pressure sensor. In order to verify the corresponding relation between the satellite pressure sensor and the actual pressure, a ground calibration manometer is required to calibrate the pressure sensor on the satellite. The pressure calibration level is megapascal (MPa) level, and the precision level is kilopascal level. Meanwhile, in order to verify the difference of the pressure sensor in the forward and reverse processes, the calibration process generally includes a boosting process and a depressurization process. The current pressure calibration is controlled by adopting a common pressure control console, the main means is to adjust the opening of a pressure reducer and a needle valve of the control console, and the pressure data on the planet is read by adopting a precise pressure gauge arranged on an inflation pipeline externally. When the inflation process is standard, the air pressure of the air source air is reduced to be close to a specified pressure value through a control console, the air is inflated into a star through a star inlet valve at the rear end, the inflation is stopped after the specified pressure is reached, the pressure in the star is waited for reducing the pressure, and the pressure is supplemented for a plurality of times after the pressure is stabilized until the pressure reaches a required value. When the deflation process is standard, the star-shaped gas is released through the star inlet valve, the deflation is stopped after the pressure reaches the preset pressure, and the pressure is replenished again after the pressure in the star is stable until the pressure reaches the required value. And after the pressure value in the satellite is stabilized within the required range, reading the pressure of the precise pressure gauge and the voltage value of the pressure sensor on the satellite, and performing pressure calibration. The pressure control precision of the common pressure control console is low, meanwhile, the pressure stabilization period is long, the pressure is required to be stabilized for multiple times, the whole required time is long, and the efficiency is low.
Disclosure of Invention
The invention solves the technical problems that: the pressure sensor calibration system based on dynamic compensation is used for accurately setting and maintaining pressure in the satellite system level pressure sensor calibration process, and improves the accuracy and calibration efficiency of pressure calibration
The solution of the invention is as follows:
a pressure sensor calibration system based on dynamic compensation comprises an air source valve, a pressure reducing valve, a quick filling valve, a micro-flow air charging regulating valve, a star feeding valve, a quick discharging valve, a micro-flow air discharging regulating valve, an air discharging stop valve, an air tank group, an air charging tank valve, an air discharging tank valve, a filter 1-filter 7, an air source pressure gauge, a pressure reducing pressure gauge and a star feeding pressure gauge;
Wherein one end of the filter 1 is connected with an external air source; the other end of the filter 1 is connected with one end of an air source valve;
the other end of the air source valve is divided into 2 paths, wherein 1 path is connected with the filter 5 and the air source pressure gauge in sequence; the other 1 path is connected with one end of the pressure reducing valve;
The other end of the pressure reducing valve is divided into 4 paths; the 1 st path is connected with the filter 6 and the decompression pressure gauge in sequence, the 2 nd path is connected with one end of the quick-filling valve, the 3 rd path is connected with one end of the micro-flow inflation regulating valve, and the 4 th path is connected with one end of the inflation tank valve;
The other end of the quick-filling valve is divided into 3 paths, and the 1 st path is sequentially connected with a filter 7, a star-entering meter valve and a star-entering pressure meter; the 2 nd path is connected with the filter 3, the star inlet valve and an external satellite in sequence; the 3 rd path is connected with one end of the filter 4;
The other end of the micro-flow inflation regulating valve is divided into 3 paths, and the 1 st path is sequentially connected with a filter 7, a star-entering meter valve and a star-entering pressure meter; the 2 nd path is connected with the filter 3, the star inlet valve and an external satellite in sequence; the 3 rd path is connected with one end of the filter 4;
The other end of the filter 4 is connected with one end of the quick-release valve and one end of the micro-flow exhaust regulating valve respectively;
the other end of the quick exhaust valve is respectively connected with the other end of the micro-flow exhaust regulating valve, one end of the exhaust stop valve and one end of the exhaust tank valve; the other end of the exhaust stop valve is emptied;
The other end of the micro-flow exhaust regulating valve is respectively connected with the other end of the quick exhaust valve, one end of the exhaust stop valve and one end of the exhaust tank valve;
the other end of the exhaust tank valve is respectively connected with the other end of the inflation tank valve and one end of the filter 2;
The other end of the air charging tank valve is respectively connected with the other end of the air discharging tank valve and one end of the filter 2;
the other end of the filter 2 is connected with a gas tank group;
The tables and valves in the system are connected through pipelines.
In the pressure sensor calibration system based on dynamic compensation, all valves adopt manual control valves; the air source valve, the star-entering valve, the exhaust stop valve, the inflation tank valve and the exhaust tank valve are needle valves; the pressure reducing valve is a high-precision pressure regulating valve with the output pressure of 0-4 MPa; the micro-flow inflation regulating valve and the micro-flow exhaust regulating valve are adjustable micro-flow regulating valves with adjustable flow of 0-1 SLM; the quick-filling valve and the quick-discharging valve are ball valves; the air source pressure gauge is a common precision electronic pressure gauge with the pressure of 0-25 MPa; the pressure reducing pressure gauge is a common precision electronic pressure gauge with the pressure of 0-10 MPa; the star entering pressure gauge is a precise electronic pressure gauge with resolution ratio not lower than 100 Pa; the filter 1-7 adopts metal filter screen type filters with the filtering precision being better than 10 um; the gas tank group comprises 3 gas tanks, the volume of each gas tank is 500mL, and the gas tanks are connected by adopting a valve and a pipeline.
The pressure sensor calibration system based on dynamic compensation is characterized in that the pressure calibration process is divided into pressure calibration in the inflation process and pressure calibration in the deflation process;
The specific control method for pressure calibration in the inflation process comprises the following steps:
all valves are set to be in a closed state;
Opening the star clock valve and keeping the star clock valve in an open state all the time; opening an air source valve to provide air for the rear end pipeline;
Regulating a pressure reducing valve, setting the output inflation pressure to be a required value p1+0.1MPa, and monitoring the pressure through a pressure reducing pressure gauge;
Opening a quick-filling valve and a star inlet valve, and filling air into a satellite storage tank on an air path of the star inlet valve;
When the star pressure representation value reaches a required value p1, closing the quick charge valve;
When the volume Va of the satellite storage tank is more than or equal to 10L, adopting a constant flow dynamic compensation mode to inflate the satellite by adopting a micro-flow mode so as to compensate the pressure reduction caused by the temperature reduction of the storage tank; when the volume Va of the satellite storage tank is smaller than 10L, adopting a quantitative gas dynamic compensation mode to charge the satellite in a micro-flow mode so as to compensate the pressure change caused by the temperature change of the storage tank; when the volume of the satellite storage tank is unknown and the temperature is unknown, adopting a variable flow dynamic compensation mode to inflate the satellite in a micro flow mode so as to compensate the pressure drop caused by the temperature reduction of the storage tank, and keeping the pressure fluctuation value of the satellite inlet pressure gauge within the fluctuation range of the required value;
After the pressure change range is confirmed to be within the fluctuation range of the required value, pressure calibration data acquisition work is carried out, and the voltage value of the pressure sensor to be calibrated and the star entering pressure representation value are read.
The pressure sensor calibration system based on dynamic compensation specifically comprises the following constant flow dynamic compensation modes:
Regulating the output pressure of the pressure reducing valve to p1+0.1MPa; according to the volume Va of the storage tank and the difference delta T between the temperature T1 of the storage tank and the room temperature T2, delta T=T1-T2, in a constant flow dynamic compensation mode k-delta T curve in the inflation process, an opening value k1 is searched, a micro-flow inflation regulating valve is set to k1, and the satellite is inflated in a micro-flow mode to compensate pressure reduction caused by the reduction of the temperature of the storage tank.
The pressure sensor calibration system based on dynamic compensation specifically comprises the following quantitative gas dynamic compensation modes:
Opening a gas tank valve, and setting a gas tank group volume combination Vb according to the volume Va and a difference value delta T between the temperature of the storage tank and the room temperature, wherein vb=Va/100; opening a gas charging tank valve, and pressurizing the gas tank group to p2, p2=p1+0.3 Mpa by using a pressure reducing valve; then closing the pressure reducing valve, and searching an opening value k2 in a quantitative gas dynamic compensation mode k-delta T curve in the inflation process; and (3) inflating the micro-flow inflation regulating valve to k2, and inflating the satellite in a micro-flow mode to compensate pressure change caused by temperature change of the storage tank.
The pressure sensor calibration system based on dynamic compensation specifically comprises the following variable flow dynamic compensation modes:
And regulating the output pressure of the pressure reducing valve to p1+0.1MPa, dynamically regulating and setting the opening of the micro-flow inflation regulating valve, and inflating the satellite in a micro-flow mode.
The specific control method for pressure calibration in the deflation process of the pressure sensor calibration system based on dynamic compensation comprises the following steps:
all valves are set to be in a closed state;
Opening the star clock valve and keeping the star clock valve in an open state all the time;
Opening an exhaust shutoff valve;
Opening the regulating quick-release valve, discharging the gas in the star, and closing the quick-release valve when the star-entering pressure representation value reaches a required value p 1;
When the volume Va of the satellite storage tank is more than or equal to 10L, adopting a constant flow dynamic compensation mode, and exhausting the satellite in a micro-flow mode to compensate pressure change caused by temperature change of the storage tank; when the volume Va of the satellite storage tank is smaller than 10L, adopting a quantitative gas dynamic compensation mode, and exhausting the satellite by adopting a micro-flow mode to compensate the pressure change caused by the temperature change of the storage tank; under the condition of unknown volume and temperature of the storage tank, adopting a variable flow dynamic compensation mode to maintain the pressure fluctuation value of the star-entering pressure gauge within a fluctuation range;
After the pressure change range is confirmed to be within the fluctuation range, pressure calibration data acquisition work is carried out, and the voltage value of the pressure sensor to be calibrated and the star entering pressure representation value are read.
The pressure sensor calibration system based on dynamic compensation specifically comprises the following constant flow dynamic compensation modes:
According to the volume Va of the storage tank and the difference delta T between the temperature T1 of the storage tank and the room temperature T2, delta T=T1-T2, searching an opening value k3 in a constant flow dynamic compensation mode k-delta T curve in the air release process; and opening and adjusting the micro-flow exhaust regulating valve to k3, and exhausting the satellite in a micro-flow mode to compensate the pressure change caused by the temperature change of the storage tank.
The pressure sensor calibration system based on dynamic compensation specifically comprises the following quantitative gas dynamic compensation modes:
Opening an exhaust tank valve, and setting a tank group volume combination Vb according to the tank volume Va and a difference value delta T between the tank temperature and the room temperature, wherein vb=Va/100; and after the gas in the gas tank group is exhausted, closing the exhaust stop valve, searching an opening value k4 in a quantitative gas dynamic compensation mode k-delta T curve in the gas exhausting process, adjusting and setting a micro-flow exhaust regulating valve to k4, and exhausting the satellite in a micro-flow mode to compensate pressure change caused by temperature change of the storage tank.
The pressure sensor calibration system based on dynamic compensation specifically comprises the following variable flow dynamic compensation modes:
Dynamically adjusting and setting the opening of the micro-flow exhaust regulating valve to ensure that the change of the star entering pressure gauge every 10 seconds is not more than 1000Pa, and deflating the satellite in a micro-flow mode.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention adopts the scheme of 'quick large-flow pressure charging and discharging and micro-flow gas dynamic compensation', the pressure of the on-board storage tank is quickly set and dynamically and stably controlled, so that the pressure fluctuation range is kept smaller, the pressure control precision and the pressure calibration working efficiency are greatly improved, as shown in figure 3, the original method needs multiple supplementing or supplementing and stabilizing processes, and the dynamic compensation method only needs transient state confirmation in the dynamic compensation process;
(2) The pressure calibration system adopts the ball valve as a control valve for quick inflation and exhaust, so that the inflation and exhaust efficiency can be improved; compared with a common needle valve, the control precision of the inflating and deflating flow is greatly improved by adopting a micro-flow regulating valve for flow control, and meanwhile, the micro-flow regulating valve is provided with vernier scales, so that a specific opening value can be set; the high-precision electronic pressure gauge is adopted, so that the pressure in the process of inflation and deflation can be precisely measured;
(3) The invention adopts the gas tank as an auxiliary control measure, and can realize the control of the change of the gas flow along with time in the link of dynamically compensating the pressure fluctuation, especially for the small-volume storage tank; meanwhile, the volume of the gas tank is variable, so that the relative time change speed of the flow can be regulated and controlled;
(4) According to the invention, parameters such as the difference value of the temperature and the room temperature of the storage tank, the volume of the storage tank and the like are introduced, the opening degree of the micro-flow regulating valve can be determined by inquiring the existing data curve or calculating the difference value, and the pressure regulating process is more accurate and efficient.
Drawings
FIG. 1 is a schematic diagram of a pressure sensor calibration system of the present invention;
FIG. 2 is a schematic diagram of a pressure sensor calibration system according to the present invention;
FIG. 3 is a graph of the constant flow dynamic compensation mode k-DeltaT of the inflation process of the present invention;
FIG. 4 is a graph of the quantitative gas dynamic compensation mode k-DeltaT of the inflation process of the present invention;
FIG. 5 is a graph of the constant flow dynamic compensation mode k-DeltaT for the deflation process of the present invention;
FIG. 6 is a graph of the quantitative gas dynamic compensation mode k-DeltaT for the gassing process of the present invention.
Detailed Description
The invention is further illustrated below with reference to examples.
The invention provides a dynamic compensation-based pressure sensor calibration system which is used for accurately setting and maintaining pressure in a satellite system level pressure sensor calibration process and improving the accuracy and calibration efficiency of pressure calibration.
The pressure sensor calibration system based on dynamic compensation, as shown in fig. 1, specifically comprises an air source valve, a pressure reducing valve, a quick filling valve, a micro-flow air charging regulating valve, a star feeding valve, a quick discharging valve, a micro-flow air discharging regulating valve, an air discharging stop valve, an air tank group, an air charging tank valve, an air discharging tank valve, a filter 1-filter 7, an air source pressure gauge, a pressure reducing pressure gauge and a star feeding pressure gauge;
Wherein one end of the filter 1 is connected with an external air source; the other end of the filter 1 is connected with one end of an air source valve;
the other end of the air source valve is divided into 2 paths, wherein 1 path is connected with the filter 5 and the air source pressure gauge in sequence; the other 1 path is connected with one end of the pressure reducing valve;
The other end of the pressure reducing valve is divided into 4 paths; the 1 st path is connected with the filter 6 and the decompression pressure gauge in sequence, the 2 nd path is connected with one end of the quick-filling valve, the 3 rd path is connected with one end of the micro-flow inflation regulating valve, and the 4 th path is connected with one end of the inflation tank valve;
The other end of the quick-filling valve is divided into 3 paths, and the 1 st path is sequentially connected with a filter 7, a star-entering meter valve and a star-entering pressure meter; the 2 nd path is connected with the filter 3, the star inlet valve and an external satellite in sequence; the 3 rd path is connected with one end of the filter 4;
The other end of the micro-flow inflation regulating valve is divided into 3 paths, and the 1 st path is sequentially connected with a filter 7, a star-entering meter valve and a star-entering pressure meter; the 2 nd path is connected with the filter 3, the star inlet valve and an external satellite in sequence; the 3 rd path is connected with one end of the filter 4;
The other end of the filter 4 is connected with one end of the quick-release valve and one end of the micro-flow exhaust regulating valve respectively;
the other end of the quick exhaust valve is respectively connected with the other end of the micro-flow exhaust regulating valve, one end of the exhaust stop valve and one end of the exhaust tank valve; the other end of the exhaust stop valve is emptied;
The other end of the micro-flow exhaust regulating valve is respectively connected with the other end of the quick exhaust valve, one end of the exhaust stop valve and one end of the exhaust tank valve;
the other end of the exhaust tank valve is respectively connected with the other end of the inflation tank valve and one end of the filter 2;
The other end of the air charging tank valve is respectively connected with the other end of the air discharging tank valve and one end of the filter 2;
the other end of the filter 2 is connected with a gas tank group;
The tables and valves in the system are connected through pipelines.
The valves are all manually controlled valves; the air source valve, the star-entering valve, the exhaust stop valve, the inflation tank valve and the exhaust tank valve are needle valves; the pressure reducing valve is a high-precision pressure regulating valve with the output pressure of 0-4 MPa; the micro-flow inflation regulating valve and the micro-flow exhaust regulating valve are adjustable micro-flow regulating valves with adjustable flow of 0-1 SLM; the quick-filling valve and the quick-discharging valve are ball valves; the air source pressure gauge is a common precision electronic pressure gauge with the pressure of 0-25 MPa; the pressure reducing pressure gauge is a common precision electronic pressure gauge with the pressure of 0-10 MPa; the star entering pressure gauge is a precise electronic pressure gauge with resolution ratio not lower than 100 Pa; the filter 1-7 adopts metal filter screen type filters with the filtering precision being better than 10 um; the gas tank group comprises 3 gas tanks, the volume of each gas tank is 500mL, and the gas tanks are connected by adopting a valve and a pipeline.
As shown in fig. 2, the air source, the pressure calibration control system and the satellite are connected, the thermosensitive-temperature converter is connected with the thermosensitive element, and the temperature of the storage tank is read through the thermosensitive-temperature converter.
The pressure calibration process is divided into inflation process pressure calibration and deflation process pressure calibration.
The pressure calibration process control method comprises the following steps:
Calibrating the pressure in the inflation process:
1) All valves are set to be in a closed state;
2) Opening the star clock valve and keeping the star clock valve in an open state all the time; opening an air source valve to provide air for the rear end pipeline;
3) Regulating a pressure reducing valve, setting the output inflation pressure to be a required value p1+0.1MPa (preferred value), and performing pressure monitoring through a pressure reducing pressure gauge;
4) Opening a quick-filling valve and a star inlet valve, and filling air into a satellite storage tank on an air path of the star inlet valve;
5) When the star pressure representation value reaches a required value p1, closing the quick charge valve;
6) When the satellite tank volume Va > =10l (preferred value), adopting a constant flow dynamic compensation mode, namely adjusting the output pressure of the pressure reducing valve to p1+0.1mpa (preferred value), searching a k- Δt curve in fig. 3 according to the tank volume Va and the difference value Δt between the tank temperature T1 and the room temperature T2 (Δt=t1-T2), determining an opening value k1, setting a micro-flow inflation regulating valve to k1, and inflating the satellite in the micro-flow mode to compensate the pressure reduction caused by the tank temperature reduction;
7) When the satellite storage tank volume Va is smaller than 10L (preferred value), a quantitative gas dynamic compensation mode is adopted, namely an inflation tank valve is opened, a tank group volume combination Vb is set according to the volume Va and the difference delta T between the storage tank temperature and the room temperature, vb is approximately equal to Va/100 (preferred value), the inflation tank valve is opened, a pressure reducing valve is used for pressurizing the tank group to p2, p2 is approximately equal to p1+0.3Mpa (preferred value), then the pressure reducing valve is closed, a k-delta T curve is searched in FIG. 4, an opening value k2 is determined, a micro-flow inflation regulating valve is set to k2, and the satellite is inflated in a micro-flow mode to compensate pressure change caused by the temperature change of the storage tank;
8) Under the conditions of unknown volume of the storage tank, temperature of the storage tank and the like, adopting a variable flow dynamic compensation mode, namely adjusting the output pressure of a pressure reducing valve to p1+0.1MPa (a preferred value), dynamically adjusting and setting the opening of a micro-flow inflation adjusting valve, and inflating a satellite by adopting a micro-flow mode to compensate the pressure drop caused by the reduction of the temperature of the storage tank, so that the pressure fluctuation value of a star entering pressure gauge is maintained within a required value fluctuation range (such as +/-5000 Pa);
9) After the pressure change range is confirmed to be within the fluctuation range of the required value, pressure calibration data acquisition work is carried out, and the voltage value of the pressure sensor to be calibrated and the star entering pressure representation value are read.
Calibrating the pressure in the deflation process:
1) All valves are set to be in a closed state;
2) Opening the star clock valve and keeping the star clock valve in an open state all the time;
3) Opening an exhaust shutoff valve;
4) Opening the regulating quick-release valve, discharging the gas in the star, and closing the quick-release valve when the star-entering pressure representation value reaches a required value p 1;
5) When the satellite tank volume Va > =10l (preferred value), adopting a constant flow dynamic compensation mode, namely searching a k- Δt curve in fig. 5 according to the tank volume Va and the difference Δt between the tank temperature T1 and the room temperature T2 (Δt=t1-T2), determining an opening value k3, opening and adjusting the micro-flow exhaust regulating valve to k3, and exhausting the satellite in the micro-flow mode to compensate the pressure change caused by the tank temperature change;
6) When the satellite storage tank volume Va is smaller than 10L (preferred value), a quantitative gas dynamic compensation mode is adopted, namely an exhaust tank valve is opened, a gas tank group volume combination Vb is set according to the storage tank volume Va and the difference value delta T between the storage tank temperature and the room temperature, vb is approximately equal to Va/100 (preferred value), after the gas in the gas tank group is exhausted, an exhaust stop valve is closed, a k-delta T curve is searched in FIG. 6, an opening value k4 is determined, a micro-flow exhaust regulating valve is regulated and set to k4, and the satellite is exhausted by adopting a micro-flow mode to compensate pressure change caused by the change of the storage tank temperature;
7) Under the condition of unknown volume and temperature of the storage tank, adopting a variable flow dynamic compensation mode, namely dynamically adjusting and setting the opening of a micro-flow exhaust regulating valve to ensure that the change of a star entering pressure gauge every 10 seconds is not more than 1000Pa (a preferred value), deflating a satellite by adopting the micro-flow mode, and finely adjusting the satellite in the stabilizing process according to the method to ensure that the pressure fluctuation value of the star entering pressure gauge is maintained within the range of p 1+/-5000 Pa;
8) After the pressure change range is confirmed to be within the fluctuation range, pressure calibration data acquisition work is carried out, and the voltage value of the pressure sensor to be calibrated and the star entering pressure representation value are read.
Although the present invention has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and technical matters disclosed above without departing from the spirit and scope of the present invention, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present invention are within the scope of the technical matters of the present invention.
Claims (9)
1. A pressure sensor calibration system based on dynamic compensation is characterized in that: the system comprises an air source valve, a pressure reducing valve, a quick filling valve, a micro-flow air charging regulating valve, a star-entering valve, a quick discharging valve, a micro-flow air discharging regulating valve, an air discharging stop valve, an air tank group, an air charging tank valve, an air discharging tank valve, a filter 1-filter 7, an air source pressure gauge, a pressure reducing pressure gauge and a star-entering pressure gauge;
Wherein one end of the filter 1 is connected with an external air source; the other end of the filter 1 is connected with one end of an air source valve;
the other end of the air source valve is divided into 2 paths, wherein 1 path is connected with the filter 5 and the air source pressure gauge in sequence; the other 1 path is connected with one end of the pressure reducing valve;
The other end of the pressure reducing valve is divided into 4 paths; the 1 st path is connected with the filter 6 and the decompression pressure gauge in sequence, the 2 nd path is connected with one end of the quick-filling valve, the 3 rd path is connected with one end of the micro-flow inflation regulating valve, and the 4 th path is connected with one end of the inflation tank valve;
The other end of the quick-filling valve is divided into 3 paths, and the 1 st path is sequentially connected with a filter 7, a star-entering meter valve and a star-entering pressure meter; the 2 nd path is connected with the filter 3, the star inlet valve and an external satellite in sequence; the 3 rd path is connected with one end of the filter 4;
The other end of the micro-flow inflation regulating valve is divided into 3 paths, and the 1 st path is sequentially connected with a filter 7, a star-entering meter valve and a star-entering pressure meter; the 2 nd path is connected with the filter 3, the star inlet valve and an external satellite in sequence; the 3 rd path is connected with one end of the filter 4;
The other end of the filter 4 is connected with one end of the quick-release valve and one end of the micro-flow exhaust regulating valve respectively;
the other end of the quick exhaust valve is respectively connected with the other end of the micro-flow exhaust regulating valve, one end of the exhaust stop valve and one end of the exhaust tank valve; the other end of the exhaust stop valve is emptied;
The other end of the micro-flow exhaust regulating valve is respectively connected with the other end of the quick exhaust valve, one end of the exhaust stop valve and one end of the exhaust tank valve;
the other end of the exhaust tank valve is respectively connected with the other end of the inflation tank valve and one end of the filter 2;
The other end of the air charging tank valve is respectively connected with the other end of the air discharging tank valve and one end of the filter 2;
the other end of the filter 2 is connected with a gas tank group;
The tables and valves in the system are connected through pipelines;
All valves are manually controlled; the air source valve, the star-entering valve, the exhaust stop valve, the inflation tank valve and the exhaust tank valve are needle valves; the pressure reducing valve is a high-precision pressure regulating valve with the output pressure of 0-4 MPa; the micro-flow inflation regulating valve and the micro-flow exhaust regulating valve are adjustable micro-flow regulating valves with adjustable flow of 0-1 SLM; the quick-filling valve and the quick-discharging valve are ball valves; the air source pressure gauge is a common precision electronic pressure gauge with the pressure of 0-25 MPa; the pressure reducing pressure gauge is a common precision electronic pressure gauge with the pressure of 0-10 MPa; the star entering pressure gauge is a precise electronic pressure gauge with resolution ratio not lower than 100 Pa; the filter 1-7 adopts metal filter screen type filters with the filtering precision being better than 10 um; the gas tank group comprises 3 gas tanks, the volume of each gas tank is 500mL, and the gas tanks are connected by adopting a valve and a pipeline.
2. The dynamic compensation-based pressure sensor calibration system of claim 1, wherein: the pressure sensor calibration is divided into inflation process pressure calibration and deflation process pressure calibration;
The specific control method for pressure calibration in the inflation process comprises the following steps:
all valves are set to be in a closed state;
Opening the star clock valve and keeping the star clock valve in an open state all the time; opening an air source valve to provide air for the rear end pipeline;
Regulating a pressure reducing valve, setting the output inflation pressure to be a required value p1+0.1MPa, and monitoring the pressure through a pressure reducing pressure gauge;
Opening a quick-filling valve and a star inlet valve, and filling air into a satellite storage tank on an air path of the star inlet valve;
When the star pressure representation value reaches a required value p1, closing the quick charge valve;
When the volume Va of the satellite storage tank is more than or equal to 10L, adopting a constant flow dynamic compensation mode to inflate the satellite by adopting a micro-flow mode so as to compensate the pressure reduction caused by the temperature reduction of the storage tank; when the volume Va of the satellite storage tank is smaller than 10L, adopting a quantitative gas dynamic compensation mode to charge the satellite in a micro-flow mode so as to compensate the pressure change caused by the temperature change of the storage tank; when the volume of the satellite storage tank is unknown and the temperature is unknown, adopting a variable flow dynamic compensation mode to inflate the satellite in a micro flow mode so as to compensate the pressure drop caused by the temperature reduction of the storage tank, and keeping the pressure fluctuation value of the satellite inlet pressure gauge within the fluctuation range of the required value;
After the pressure change range is confirmed to be within the fluctuation range of the required value, pressure calibration data acquisition work is carried out, and the voltage value of the pressure sensor to be calibrated and the star entering pressure representation value are read.
3. A dynamic compensation-based pressure sensor calibration system according to claim 2, wherein: the constant flow dynamic compensation mode specifically comprises the following steps:
Regulating the output pressure of the pressure reducing valve to p1+0.1MPa; according to the volume Va of the storage tank and the difference delta T between the temperature T1 of the storage tank and the room temperature T2, delta T=T1-T2, in a constant flow dynamic compensation mode k-delta T curve in the inflation process, an opening value k1 is searched, a micro-flow inflation regulating valve is set to k1, and the satellite is inflated in a micro-flow mode to compensate pressure reduction caused by the reduction of the temperature of the storage tank.
4. A dynamic compensation-based pressure sensor calibration system according to claim 3, wherein: the quantitative gas dynamic compensation mode specifically comprises the following steps:
Opening a gas tank valve, and setting a gas tank group volume combination Vb according to the volume Va and a difference value delta T between the temperature of the storage tank and the room temperature, wherein vb=Va/100; opening a gas charging tank valve, and pressurizing the gas tank group to p2, p2=p1+0.3 Mpa by using a pressure reducing valve; then closing the pressure reducing valve, and searching an opening value k2 in a quantitative gas dynamic compensation mode k-delta T curve in the inflation process; and (3) inflating the micro-flow inflation regulating valve to k2, and inflating the satellite in a micro-flow mode to compensate pressure change caused by temperature change of the storage tank.
5. The dynamic compensation-based pressure sensor calibration system of claim 4, wherein: the variable flow dynamic compensation mode specifically comprises the following steps:
And regulating the output pressure of the pressure reducing valve to p1+0.1MPa, dynamically regulating and setting the opening of the micro-flow inflation regulating valve, and inflating the satellite in a micro-flow mode.
6. A dynamic compensation-based pressure sensor calibration system according to claim 2, wherein: the specific control method for pressure calibration in the deflation process comprises the following steps:
all valves are set to be in a closed state;
Opening the star clock valve and keeping the star clock valve in an open state all the time;
Opening an exhaust shutoff valve;
Opening the regulating quick-release valve, discharging the gas in the star, and closing the quick-release valve when the star-entering pressure representation value reaches a required value p 1;
When the volume Va of the satellite storage tank is more than or equal to 10L, adopting a constant flow dynamic compensation mode, and exhausting the satellite in a micro-flow mode to compensate pressure change caused by temperature change of the storage tank; when the volume Va of the satellite storage tank is smaller than 10L, adopting a quantitative gas dynamic compensation mode, and exhausting the satellite by adopting a micro-flow mode to compensate the pressure change caused by the temperature change of the storage tank; under the condition of unknown volume and temperature of the storage tank, adopting a variable flow dynamic compensation mode to maintain the pressure fluctuation value of the star-entering pressure gauge within a fluctuation range;
After the pressure change range is confirmed to be within the fluctuation range, pressure calibration data acquisition work is carried out, and the voltage value of the pressure sensor to be calibrated and the star entering pressure representation value are read.
7. The dynamic compensation-based pressure sensor calibration system of claim 6, wherein: the constant flow dynamic compensation mode specifically comprises the following steps:
according to the volume Va of the storage tank and the difference delta T between the temperature T1 of the storage tank and the room temperature T2, delta T=T1-T2, searching an opening value k3 in a constant flow dynamic compensation mode k-delta T curve in the air release process; and opening and adjusting the micro-flow exhaust regulating valve to k3, and exhausting the satellite in a micro-flow mode to compensate the pressure change caused by the temperature change of the storage tank.
8. The dynamic compensation-based pressure sensor calibration system of claim 7, wherein: the quantitative gas dynamic compensation mode specifically comprises the following steps:
Opening an exhaust tank valve, and setting a tank group volume combination Vb according to the tank volume Va and a difference value delta T between the tank temperature and the room temperature, wherein vb=Va/100; and after the gas in the gas tank group is exhausted, closing the exhaust stop valve, searching an opening value k4 in a quantitative gas dynamic compensation mode k-delta T curve in the gas exhausting process, adjusting and setting a micro-flow exhaust regulating valve to k4, and exhausting the satellite in a micro-flow mode to compensate pressure change caused by temperature change of the storage tank.
9. The dynamic compensation-based pressure sensor calibration system of claim 8, wherein: the variable flow dynamic compensation mode specifically comprises the following steps:
Dynamically adjusting and setting the opening of the micro-flow exhaust regulating valve to ensure that the change of the star entering pressure gauge every 10 seconds is not more than 1000Pa, and deflating the satellite in a micro-flow mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211451204.8A CN115931215B (en) | 2022-11-18 | 2022-11-18 | Pressure sensor calibration system based on dynamic compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211451204.8A CN115931215B (en) | 2022-11-18 | 2022-11-18 | Pressure sensor calibration system based on dynamic compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115931215A CN115931215A (en) | 2023-04-07 |
| CN115931215B true CN115931215B (en) | 2024-06-25 |
Family
ID=86699998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211451204.8A Active CN115931215B (en) | 2022-11-18 | 2022-11-18 | Pressure sensor calibration system based on dynamic compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115931215B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100472194C (en) * | 2007-06-13 | 2009-03-25 | 袁玉英 | Static characteristic detection system of voltage regulator |
| RU2533745C1 (en) * | 2013-07-11 | 2014-11-20 | Открытое акционерное общество "Конструкторское бюро химавтоматики" | Dialling and calibration method of gas flow meter, and device for its implementation |
| CA2851440A1 (en) * | 2014-05-05 | 2015-11-05 | Lacey Instrumentation Inc. | Pressure gauge testing device |
| RU2573671C1 (en) * | 2014-07-09 | 2016-01-27 | Федеральное государственное унитарное предприятие "Государственный научно-исследовательский институт прикладных проблем" | Method and device for dynamic pressure sensor calibration |
| CN107830914B (en) * | 2017-09-19 | 2020-02-14 | 兰州空间技术物理研究所 | Micro-flow calibration device and method with double-channel symmetrical structure |
| CN109631826B (en) * | 2018-12-29 | 2021-02-09 | 航天东方红卫星有限公司 | Satellite automation precision detection method |
| CN109916556B (en) * | 2019-04-11 | 2023-11-03 | 华能国际电力股份有限公司 | Portable dynamic and static calibration system for pressure sensor |
-
2022
- 2022-11-18 CN CN202211451204.8A patent/CN115931215B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 卫星用高精度压力传感器研究;付新菊;关威;;仪表技术与传感器;20180215(第02期);第156-158页 * |
| 小卫星真空检漏设备研制;丁勤;苏文;葛宇;薛长利;;航天器环境工程;20060620(第03期);第49-54页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115931215A (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3918291A (en) | Method and apparatus for testing leakage rate | |
| CN102401720B (en) | The calibration of the pressure transducer in storage hydrogen system | |
| US7730759B2 (en) | Method and device for calibrating a humidity sensor and sensor arrangement having humidity sensor capable of calibration | |
| US8887516B2 (en) | Refrigerant charging system and method for using vapor-phase refrigerant | |
| US20060010898A1 (en) | System for refrigerant charging with constant volume tank | |
| CN107941307B (en) | Propellant flow field calibration system and method for conventional large-scale liquid engine | |
| US10534375B2 (en) | Gas insensitive mass flow control systems and methods | |
| US7254954B2 (en) | Refrigerant charging system and method using cartridges and scale | |
| CN107131931A (en) | Attitude control engine high-temperature propellant steady state flow calibrated in situ device and calibration method | |
| CN102401721A (en) | Calibration of all pressure transducers in hydrogen storage system | |
| CN107830914B (en) | Micro-flow calibration device and method with double-channel symmetrical structure | |
| US4888718A (en) | Volume measuring apparatus and method | |
| EP0223300A2 (en) | Gas meter | |
| US20210080313A1 (en) | Mass flow verificaton based on rate of pressure decay | |
| CN104769727A (en) | Method and device for supplying hydrogen-selenide mixed gas | |
| CN103796938A (en) | Powder supply device and powder supply method | |
| US4823592A (en) | Test apparatus for proving the performance of mass flow meters | |
| CN115931215B (en) | Pressure sensor calibration system based on dynamic compensation | |
| CN100545609C (en) | Adopt linear vacuum gauge to measure the device and method of orifice conductance | |
| EP1836461B1 (en) | Gas flowmeter calibration stand | |
| US20210087980A1 (en) | Fuel metering circuit and method with compensation for fuel-density variability | |
| JP2008506116A (en) | Method and system for flow measurement and mass flow regulator validation | |
| CN102087159B (en) | Differential pressure leakage detecting method for double primary standards | |
| CN105757448A (en) | Accurate gas sub-packaging device | |
| CN109854957B (en) | Filling method of closed parallel storage tank with low filling rate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |