CN104165728A - Pressure controller high in accuracy - Google Patents
Pressure controller high in accuracy Download PDFInfo
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- CN104165728A CN104165728A CN201410440097.8A CN201410440097A CN104165728A CN 104165728 A CN104165728 A CN 104165728A CN 201410440097 A CN201410440097 A CN 201410440097A CN 104165728 A CN104165728 A CN 104165728A
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Abstract
The invention discloses a pressure controller high in accuracy. The pressure controller comprises a machine case, control parts, fluid pressure input-output interfaces, a power supply module, a communication module, a pressure standard module, a fluid pressure control module, an electrical signal detection module and a central processing module, wherein the control parts include the power switch, the displayer, the keyboard and the like, an installation base of the pressure standard module is designed to be provided with a plurality of interfaces where pressure standard sensors with different measuring ranges are installed, the pressure control module, the pressure standard module, the central processing module, the electrical signal detection module and a calibrated instrument are connected through signal wires, and the power supply module is used for converting the AC into the DC for power supplying. The pressure standard is arranged in the pressure controller, standard pressure high in accuracy can be automatically output, and the multi-measuring-range pressure standard module capable of being used for selection is suitable for various calibrated pressure instruments; meanwhile, electrical signals can be detected and calibrated, and control by an upper computer and data collection can be achieved through communication with a computer.
Description
technical field:
The invention belongs to the measurement and calibration field of pressure tool instrument, relate generally to the efficiently instrument and meter for automation calibration fast in this field, the normal pressure value output instrument that particularly relates to a kind of accurate control, carries out the auto-calibration equipment of the two aspects calibrations of pressure and output electrical signals changeable standard range to manometer.
background technology:
National Quality & Technology Inspection Bureau's mandatory provisions: the manometer using in the fields such as commercial production, pressure survey, all will carry out calibration or verification (the precision pressure instrument calibration cycle is a year) to it every half a year, to determine that whether this tensimeter is accurate.
The equipment that common pressure calibration adopts is piston manometer or digital pressure gauge.Piston manometer is in the pipeline of a certain sealing, be provided with two output interfaces, an output interface connects piston component, another output interface connects tested instrument, changes the size of pressure by changing the counterbalance mass applying on piston component, and the method for this kind of calibrating manometer is large because move counterweight labour intensity, piston component processing technology is complicated, manufacturing cost is high, and affected greatly by acceleration of gravity and ambient temperature and humidity, requires service condition harsh.
Digital pressure gauge calibrating manometer is by the pipeline of a certain sealing, be provided with pressurizer and two output interfaces, an output interface connection standard table is digital pressure gauge, another output interface connects tested instrument, by the fluid manual pressure in pipeline liquid injecting device, produce pressure, then compare the standard of reading and tested instrument indication value by observation.This traditional manual pressure regulates the pressure calibration mode of pressure, is difficult to precisely control output pressure value, and observation affected by artificial interference factor larger, waste time and energy, work efficiency is low.
In order to address this problem, improve the work efficiency of manometer assay calibration, in recent years, offshore company also possesses some special knowledge to pin-point accuracy pressure controller.
External pressure controller, generally adopts a built-in pressure transducer as pressure standard meter, also has the situation that adopts two pressure transducers, and using one as pressure standard meter, another is for referenmce atomsphere pressure survey.That situation no matter, range is all single, the pressure measurement range of pressure controller and range of control are all little.The measurement range that exceeds this pressure controller, just need to purchase the pressure controller of an other corresponding range.Use overrun, accuracy of measurement can reduce greatly, with Time Controller internal components, also can damage because of overload.Therefore, user need to purchase the pressure controller of different ranges, has increased economically user's burden.
summary of the invention:
The present invention is in order to address this problem, the work efficiency that improves manometer assay calibration, the present invention has designed a kind of pin-point accuracy pressure controller, and this method has overcome the shortcoming of personnel's observation and manual pressure adjusting pressure, can automatically monitor and regulate pressure, significantly improve work efficiency.
This pressure controller and external pressure source have together formed an apparatus system.In the pressure calibration pipeline of sealing, according to set pressure, by external pressure source, provide pressure, by the automatic monitoring of pressure transducer and the automatic control of control pressurer system, a certain set pressure output is provided, and access is calibrated manometer, for manometer is carried out to automatic calibration.
Simultaneously for digital pressure instrument such as pressure units, due to its output electrical signals value accurately whether, directly have influence on its gaging pressure.Therefore,, for this type of digital pressure instrument, except the pressure magnitude of calibrated meter, also require its electric signal (electric current, voltage and switching pulse) to carry out value calibration.Traditional calibration method is in pressure calibration, to be equipped with a set of electric measuring instrument electric signal is examined and determine again, and works very loaded down with trivial details, and pin-point accuracy pressure controller has ideally carried out pressure calibration and electrical measurement calibration integrated, has solved loaded down with trivial details this difficult problem.
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For achieving the above object, the present invention takes following technical scheme:
A pressure controller, described pressure controller has carried out pressure calibration and electrical measurement calibration integrated, comprises casing, supply module, pressure control module, pressure criteria module, electrical measurement module and central processing module;
Further, described casing front panel is provided with display screen, keyboard and electric signal delivery outlet and power switch, cabinet rear panel is provided with fluid pressure input interface, output fluid pressure interface, RS232 interface and external power source interface, and each assembly of box house connects by pipeline or power lead/signal wire;
Further, described supply module one termination AC220V supply socket, the other end joins with pressure control module, central processing module, electrical measurement module, pressure criteria module respectively, wherein central processing module also joins with pressure control module, electrical measurement module, pressure criteria module, computing machine respectively, and electrical measurement module and tested instrument are joined; Pressure control module one end by pressure piping and pressure source join, the other end joins by pressure piping and pressure criteria module, pressure criteria module is joined by pressure piping and tested instrument;
Further, described supply module comprises transformer, current rectifying and wave filtering circuit, short-circuit protection circuit, switch de-twitter circuit, power switch, three voltage transitions chips, and wherein transformer, current rectifying and wave filtering circuit, short-circuit protection circuit, switch de-twitter circuit, power switch are connected successively; Power switch is arranged on the front panel place of casing and is connected with voltage transitions chip, the first voltage transitions chip is connected with pressure control module, second voltage conversion chip is connected with central processing module, and tertiary voltage conversion chip is connected with electrical measurement module with pressure criteria module;
Further, described pressure control module comprises transfer valve, accumulator, micro-adjusting mechanism, blowoff valve, delivery valve and a three-way connection for Bonding pressure standard module and tested table output interface, described transfer valve, accumulator, micro-adjusting mechanism, blowoff valve, delivery valve all connect by pressure piping and are arranged on an integrated valve piece, one end of described valve piece has an interface and is connected with rear panel input port by pipeline, and interface arranges transfer valve; Accumulator is arranged on the rear end of transfer valve; Blowoff valve communicates with accumulator; Delivery valve one end communicates with accumulator, and the other end communicates with atmosphere or fuel tank; Micro-adjusting mechanism is an electric pushrod, is connected with accumulator; On described valve piece, be provided with another interface, the logical accumulator in described another interface one end and delivery valve, other end connecting tee joint, a wherein termination pressure criteria module of described three-way connection, also has an endmatcher case rear panel output interface to be connected with tested instrument;
Further, the electric control system of described pressure control module comprises pressure control driving circuit, range switch circuit and central processing module, wherein central processing module is controlled driving circuit with pressure respectively, range switch circuit is connected, and pressure is controlled the driving circuit other end and is connected with transfer valve, micro-adjusting mechanism, blowoff valve, delivery valve respectively; Range switch circuit is connected with pressure criteria module;
Further, in described pressure criteria module, there is a standard mounting blocks, it is provided with the pressure criteria sensor that at least comprises two kinds of ranges, two transfer valves that described sensor is corresponding, one end of described standard mounting blocks is connected with described three-way connection, in the middle of standard mounting blocks, processing one through hole communicates with two transfer valves by pressure piping, wherein the first pressure criteria sensor is connected with the first transfer valve by pressure piping, and the second pressure criteria sensor is connected with the second transfer valve by pressure piping; First, second pressure criteria sensor is connected with central processing module, and central processing module is connected to range switch circuit one end, and range switch circuit is also connected with two transfer valves;
Further, the signal processing unit of described pressure criteria module comprises constant current source, D/A converting circuit A, microprocessor, RS232 communication chip, storage chip and temperature survey chip, wherein the first pressure criteria sensor is connected with constant current source, D/A converting circuit A, the D/A converting circuit A other end is connected with microprocessor, microprocessor is connected with RS232 communication chip, poke chip and temperature survey chip, and the RS232 communication chip other end takes back central processing module;
Further, described electrical measurement module comprises electrical measurement management circuit, signal de-twitter circuit, two input protection circuits, two electrostatic discharge protection circuits, TVS array amplitude limiter circuit, signal filter circuit, D/A converting circuit B; Electrical measurement management circuit one end is connected with central processing module, the other end divides two-way, each road assembly is all for being connected in series, wherein a road series sequence is signal de-twitter circuit, the first input protection circuit, the first electrostatic discharge protection circuit, signal input port is tested switching signal input, another road series sequence is D/A converting circuit B, signal filter circuit, TVS array amplitude limiter circuit, the second input protection circuit, the second electrostatic discharge protection circuit, and signal input port is tested electric signal input;
Further, described central processing module comprises MCU STM32 F103, keyboard circuit, RS232 interface, temperature collection circuit, clock circuit, electric signal measurement circuit, display, pressure control circuit, pressure criteria commutation circuit, data storage circuitry, warning circuit, supply module is connected with MCU STM32 F103 central processing element, MCU STM32 F103 respectively with keyboard circuit, RS232 interface, temperature collection circuit, clock circuit, electric signal measurement circuit, display, pressure control circuit, pressure criteria commutation circuit, data storage circuitry, warning circuit is connected.
The present invention takes above conceptual design, has following characteristics:
(1) pressure control is stable rapidly, and work is easily efficient:
The present invention is by automatic measurement and regulating and controlling to outside incoming stream body pressure, rapidly at a certain hydrodynamic pressure accurately of Output pressure port output, using it as normal pressure, offer and be calibrated manometer, conventionally gas stabilization time is 15 seconds, the liquid stabilising time is 20 seconds, at least shorten 1/3 than traditional pressure calibration equipment single-point alignment time, and without a dead lift counterweight or pressurization manually, when reducing labour intensity, shorten the working time, therefore greatly improved work efficiency.
(2) pin-point accuracy is measured, and measurement range is wide in range, and economy is high:
The high-precision pressure sensor of the present invention is built-in a plurality of different ranges, as pressure criteria, can carry out the switching of corresponding range standard to the tested manometer of different ranges, be convenient to meet the configuration of different user; Use built-in pressure criteria, be easy to carry, the automatic switchover of pressure criteria, the also conveniently calibration to the tested table of different ranges.The present invention has configured many pressure criterias, and measurement range is wide in range, covers tested manometer scope large, and user, without configuration multiple devices, greatly reduces user's cost, and economy is high.
(3) can carry out for the manometer of variety classes and multiple range pressure and electric signal automatic calibration:
The present invention has also combined electrical signal detection circuit, when manometer is carried out to pressure calibration, and its output electrical signals is carried out to testing calibration, implement the integrated calibration of pressure and electric signal, user needn't configure electric measuring instrument in addition, and testing calibration work is more easily laborsaving, economical and practical.
(4) small and exquisite portable, low-carbon environment-friendly:
The pressure calibration checkout equipment that the present invention compares traditional has dwindled controller own wt and volume greatly, has saved starting material; Instrument itself does not produce any pollution and industrial waste product, the scene that is easy to carry, low-carbon environment-friendly yet.
The present invention adopts above design, has not only realized full-automatic calibration, and also the calibration of the combination by pressure and electric signal has improved accuracy, significantly improves work efficiency, and multirange standard automatic switchover technology simultaneously has further promoted the economy of product.
accompanying drawing explanation:
Fig. 1 is pin-point accuracy pressure controller structural drawing of the present invention;
Fig. 2 is internal structure block diagram of the present invention;
Fig. 3 is the supply module circuit block diagram in internal structure of the present invention;
Fig. 4 be pressure control module in internal structure of the present invention form and with other module annexation figure;
Fig. 5 is pressure criteria module and pressure criteria theory diagram in internal structure of the present invention;
Fig. 6 is the electrical signal detection circuit in internal structure of the present invention;
Fig. 7 is the CPU module theory diagram in internal structure of the present invention.
embodiment:
following content in connection with Figure of description to detailed description of the present invention:
Referring to Fig. 1, Fig. 2, for pin-point accuracy pressure controller provided by the present invention, comprise a casing 70 and be assembled in respectively supply module 1, pressure control module 2, pressure criteria module 3, electrical measurement module 4 and the central processing module 5 in casing, be placed in display screen 52, keyboard 47 and electric signal delivery outlet and the power switch of casing 70 front panels, cabinet rear panel is provided with the interface of fluid pressure input, the interface of output fluid pressure (tested Instrument connection mouth), RS232 interface and external power source interface etc.; Each assembly of box house has by pipeline and connects (in diagram for thick line), has by power lead or signal wire and connects (in diagram, being fine line), and mainly relation is as described below for it:
Supply module 1, is mainly each electric elements continued power of instrument.As shown in Figure 3: casing 70 rear panels of the present invention arrange an AC220V supply socket; described supply module 1 comprises transformer 6, current rectifying and wave filtering circuit 7, short-circuit protection circuit 8, switch de-twitter circuit 9 and power switch circuit 10; above-mentioned part is joined successively; wherein transformer 6 is connected with supply socket; the output terminal of transformer enters current rectifying and wave filtering circuit 7(and adopts diode rectification bridge circuit); by the AC rectification of power transformer, it is DC voltage; pass through again High frequency filter; low frequency filtering, has obtained clean direct current.Short-circuit protection circuit 8 utilizes transistor sampling and outputting voltage, judges whether to be short-circuited, and cut off output according to the state variation before and after output voltage short circuit.Eliminate after short circuit, restart power supply, circuit can normally be worked.Switch de-twitter circuit 9 is used integrating circuit debounce, and output transition occurs in integrator and is integrated to a break over voltage constantly.Switch from fluttering, because the time is very short, cannot make integrating circuit reach break over voltage, so just can overcome the Vibrating pulse that switch from fluttering is introduced.Power switch circuit 10 is arranged on the front panel place of casing 70, use is with the pushbutton switch of display lamp, like this can be straightforward see on-off state, by voltage transitions chip 11,78 classical stable series voltage conversion chips of 12,13(employing) for the electricity consumption devices such as pressure control module 2, central processing module 5, pressure criteria module 3 provide galvanic current source.
Pressure control module 2 is by the control circuit of solenoid valve and central processing module 5, to realize the control of fluid pressure.(thick lines represent pressure piping as shown in Figure 4, hachure indication circuit and signal line), the pipeline portions of pressure control module 2 comprises transfer valve 14, accumulator 15, micro-adjusting mechanism 16, blowoff valve 17, delivery valve 18 and a three-way connection for Bonding pressure standard module 3 and tested table output interface, and described tested table output interface is connected with tested instrument.The electric control system of pressure control module 2 comprises pressure control driving circuit 20 and central processing module 5, comprise the chip that is loaded with pressure control algolithm, control chip has write the fundamental formular of model-free adaption algorithm, according to the variation of different variablees, come control inputs valve 14 and delivery valve 18 open or close, the force value of setting to reach output.Described transfer valve 14, accumulator 15, micro-adjusting mechanism 16, blowoff valve 17, delivery valve 18 are installed on an integrated valve piece, one end of valve piece has an interface and is connected with rear panel input port by pipeline, interface arranges transfer valve 14, is used for closing or opens external pressure source; Accumulator 15 is arranged on transfer valve 14 rear ends, in order to stable, and the pressure of balance control system; Blowoff valve 17 communicates with accumulator 15, its objective is to open if desired to get rid of dirt in controller; Micro-adjusting mechanism 16 is an electric pushrod, is connected with accumulator 15, is the device that trace regulates pressure to change; Delivery valve 18 one end communicate with accumulator 15, and the other end communicates with atmosphere or fuel tank, and controlled chip controls changes by opening or closing to change pressure; On integrated valve block, be provided with another interface, the logical accumulator 15 in interface one end and delivery valve 18, other end connecting tee joint, termination pressure criteria module 3, one endmatcher case rear panel output interfaces of threeway are connected with tested instrument.
Pressure criteria module 3, (thick lines represent pressure piping as shown in Figure 5, hachure indication circuit and signal line), pressure criteria module 3 is to provide pressure criteria and the range changeover module of pin-point accuracy, it is provided with the pressure criteria sensor 26 that at least comprises two kinds of ranges (can expand) on a standard mounting blocks 25, 27, the transfer valve 23 that standard transducer is corresponding, 24, one end of standard mounting blocks 25 is connected with above-mentioned threeway, processing one through hole and transfer valve 23 in the middle of standard mounting blocks 25, transfer valve 24 communicates, pressure criteria sensor 26 is connected with transfer valve 23, when transfer valve 23 is opened, pressure criteria sensor 26 communicates with standard mounting blocks 25 interstitial holes, pressure criteria sensor 27 is connected with transfer valve 24, when transfer valve 24 is opened, pressure criteria sensor 27 communicates with standard mounting blocks 25 interstitial holes.
As pressure criteria sensor 26, 27, it forms structure is pressure-sensitive device sensor body, treatment circuit (in dotted line frame) comprises constant-current source circuit 28, D/A converting circuit A29, microprocessor 30, RS232 communication chip 31, storage chip 32, temperature survey chip 33, wherein constant-current source circuit 28 one end are connected with supply module 1, the other end is connected with pressure criteria sensor 26, constant-current source circuit 28 adopts high precision, low drift voltage fiducial chip ADR421, form high precise current source with the amplifier op777 floating without temperature, the impact of basic removal temperature and time on its precision.Analog to digital conversion circuit A29 is connected with microprocessor 30 with pressure criteria sensor 26 respectively, use 24 ultra-low noise PGIA analog to digital converter CS5532, use charge balance technique, high dynamic range, output word speed able to programme, power configuration flexibly, all becomes the desirable chip of pressure tool and process control.By the pressure criteria sensor 26 that encouraged by constant-current source circuit 28 of sampling, output LOW voltage signal is converted into digital signal to CS5532, then, by compatible SPI interface, sends microprocessor 30 to.Microprocessor 30 is connected with RS232 communication chip 31, storage chip 32, temperature survey chip 33 respectively, wherein storage chip 32 is used the Nonvolatile ferroelectric random access memory of ferroelectric 64K position, structural capacity is 8,192X8 position, unlimited read-write number of times, power failure data keeps 10 years, writes data without time delay, the ferroelectric manufacturing process of high reliability, bus speed can reach 1MHZ..These characteristics are suitable as the power down parameter storage of microprocessor 30 very much.Temperature survey chip 33 adopts 12 temperature sensors of high precision DS18B20, unibus, and low-power consumption, the measuring accuracy of ± 0.5 ℃, has guaranteed the effective measurement to temperature, completes the accurate temperature compensation to pressure criteria sensor 26.RS232 communication chip 31 is used SP3232EEN; comprise a line drive; line receiver and one are with the double charge mercury of ± 15-kV esd protection; this device can meet TIA/EIA-232-F requirement; and provide interface between an asynchronous communication controller and serial port connector; electric charge mercury and four small-sized CSET can be worked under single channel 3V to 5.5V supply voltage, and these devices are worked when data signalling rate reaches the 30-V/s driver output revolution rate of 250 kbit/s and maximum.This chip makes microprocessor 30 and central processing module 5 communication effectively immediately.
Electrical measurement module 4, as shown in Figure 6, electrical measurement module 4 is electric signal measurement calibration circuits.Electrical measurement module 4 comprises electrical measurement management circuit 34, signal de-twitter circuit 35, input protection circuit 36,42, electrostatic discharge protection circuit 37,43, D/A converting circuit B39, signal filter circuit 40, TVS array amplitude limiter circuit 41,34 pairs of all kinds of measuring-signals of electrical measurement management circuit carry out Classification Management, realize different measuring passage and control; Signal de-twitter circuit 35 is used integrating circuit debounce, so just can stop the ghost pulse that switch from fluttering is introduced; Input protection circuit 36,42 adopts the resistance of coupling, current/voltage amplitude and the injury of transition to circuit chip of restriction input signal; Electrostatic discharge protection circuit 37,43 adopts PolySURG (TM) the 0603ESDA-TR ESD that can protect 15KV, absorbs the static from each side, prevents from puncturing circuit; TVS array amplitude limiter circuit 41 adopts silicone tube array and high-precision low-drift amplifier, forms amplitude limit self-protection circuit, completes last pipe protection work; Signal filter circuit 40 adopts two RC filtering, and common-mode signal is processed, and is then transported to D/A converting circuit B39; D/A converting circuit B39 is used 24 ultra-low noise PGIA analog to digital converter CS5532, use charge balance technique, high dynamic range, output word speed able to programme, power configuration flexibly, the desirable chip that becomes pressure tool and process control, the electromotive signal that CS5532 inputs by sampling, is converted into digital signal.The course of work is when the normal pressure of pressure control module imposes on tested table, can produce electric signal (the signal terminal diagram of tested instrument is not indicated) at its pressure switch signal input terminal and electric signal input/output terminal, pressure switch signal input terminal is connected respectively signal amplifier with electric signal input end, the electric signal of generation is inputed to electrical measurement management circuit 34, electric signal is after signal amplifies processing, input to coupled D/A converting circuit B39, through conversion, convert electrical signals to digital signal again, by electrical measurement management circuit 34, draw the electric signal numerical value of detection, or obtain the status information of pressure switch break-make, and show (diagram does not mark) by display 52.Now, electrical signal detection numerical value, can be used as the electric signal displayed value of manometer output, simultaneously also as the calibration value to manometer output electrical signals, for judging the order of accuarcy that manometer output electrical signals value and standard value differ, or for judging whether manometer output electrical signals value conforms to specified value.
Central processing module 5, as shown in Figure 7, central processing module 5 is comprised of Single Chip Microcomputer (SCM) system, and major function is the needed calculating of executive system work, the generation of control signal, the Core Features such as each several part communication.Its chief component: MCU (STM32F103) 46 central processing elements, the microprocessor based on Cortex kernel that adopts STMicw Electronics (STMicroelectronics) to release, internal height is integrated, and provide high-quality firmware library convenient exploitation, internal module is complete, performance is powerful, by supply module 1, powered, receive the signal of pressure criteria module 3, the pressure value of pressure criteria sensor 26 or 27 is passed through to digital communication interface returning pressure control module 2, by with chip in predefined force value compare, pressure control algolithm is carried out controlled quentity controlled variable calculating according to the difference of setting value and standard measured value, and the controlled quentity controlled variable of calculating is flowed to pressure control circuit 53 again, by pressure control circuit 53, realized above-mentioned transfer valve 14, the control of delivery valve 18 and micro-adjusting mechanism 16, realize pressure closed-loop control accurately, pressure control circuit 53 has formed System Controlled by Measuring Pressure with pressure criteria commutation circuit 54, RS232 interface 48, central processing unit system, display 52 and keyboard circuit 47, by keyboard circuit 47 input set pressures, by display 52, shows pressure control result.MCU(STM32F103) 46 are also connected with electric signal measurement circuit 51, implement the detection of tested table output electrical signals and calibration.RS232 interface 48 can be connected as external computing machine, printer etc. with other external equipment.
Keyboard circuit 47 adopts array keyboard, effectively detects at a high speed operator's action, completes man-machine input function.Level conversion when RS232 interface 48 completes modules communication, guarantees the correct and real-time of communication.Temperature collection circuit 49 is used high precision Surface Mount sensor BMP085, completes the monitoring to atmospheric pressure and working temperature.51 pairs, electric signal measurement circuit needs the signal of measuring to process, and is then converted to digital signal and sends into MCU (STM32F103) 46.Warning circuit 56 drives a hummer to realize alarm by triode.Data storage circuitry 55 is used ferroelectric nonvolatile ferroelectric random storer, unlimited read-write number of times, and power failure data keeps 10 years, writes data without time delay, the ferroelectric manufacturing process of high reliability, bus speed can reach 1MHZ.These characteristics are suitable as power down parameter storage very much.Pressure control circuit 53 is realized the control to each solenoid valve by control, finally realizes pressure controlled object.Display 52 is interface between man-machine interaction.
In sum, the present invention is in airtight pressure piping, user's set target pressure value, pin-point accuracy pressure controller is by the finely regulating of multi-path fluid pressure regulating and controlling valve and minute-pressure governor motion, fluid pressure is carried out setup control, at Output pressure port, exports hydrodynamic pressure accurately.By the pressure ratio with tested instrument to realizing fast the calibration to tested instrument.
Each module connects each other and is assembled in casing above, and the connection pattern of the installation site of each intermodule and intermodule is all not particularly limited, and is only a kind of example shown in Fig. 1, concrete mounting means take without interfere and easy to use be principle.
Claims (10)
1. a pin-point accuracy pressure controller, it is characterized in that, described pressure controller has carried out pressure calibration and electrical measurement calibration integrated, and described controller comprises casing (70), supply module (1), pressure control module (2), pressure criteria module (3), electrical measurement module (4) and central processing module (5).
2. pressure controller according to claim 1, it is characterized in that: casing (70) front panel is provided with display screen (52), keyboard (47) and electric signal delivery outlet and power switch, cabinet rear panel is provided with fluid pressure input interface, output fluid pressure interface, RS232 interface and external power source interface, and each assembly of box house connects by pipeline or power lead/signal wire.
3. pressure controller according to claim 1, it is characterized in that: described supply module (1) one termination AC220V supply socket, the other end joins with pressure control module (2), central processing module (5), electrical measurement module (4), pressure criteria module (3) respectively, wherein central processing module (5) also joins with pressure control module (2), electrical measurement module (4), pressure criteria module (3), computing machine respectively, and electrical measurement module (4) is joined with tested instrument; Pressure control module (2) one end by pressure piping and pressure source join, the other end joins by pressure piping and pressure criteria module (3), pressure criteria module (3) is joined by pressure piping and tested instrument.
4. pressure controller according to claim 1, it is characterized in that: described supply module (1) comprises transformer (6), current rectifying and wave filtering circuit (7), short-circuit protection circuit (8), switch de-twitter circuit (9), power switch (10), three voltage transitions chips (11,12,13), wherein transformer (6), current rectifying and wave filtering circuit (7), short-circuit protection circuit (8), switch de-twitter circuit (9), power switch (10) are connected successively; Power switch (10) be arranged on casing (70) front panel place and with voltage transitions chip (11,12,13) be connected, the first voltage transitions chip (11) is connected with pressure control module (2), second voltage conversion chip (12) is connected with central processing module (5), and tertiary voltage conversion chip (13) is connected with electrical measurement module (4) with pressure criteria module (3).
5. pressure controller according to claim 1, it is characterized in that: described pressure control module (2) comprises transfer valve (14), accumulator (15), micro-adjusting mechanism (16), blowoff valve (17), delivery valve (18), an and three-way connection for Bonding pressure standard module (3) and tested table output interface, described transfer valve (14), accumulator (15), micro-adjusting mechanism (16), blowoff valve (17), delivery valve (18) all connects by pressure piping and is arranged on an integrated valve piece, one end of described valve piece has an interface and is connected with rear panel input port by pipeline, interface arranges transfer valve (14), accumulator (15) is arranged on the rear end of transfer valve (14), blowoff valve (17) communicates with accumulator (15), delivery valve (18) one end communicates with accumulator (15), and the other end communicates with atmosphere or fuel tank, micro-adjusting mechanism (16) is an electric pushrod, is connected with accumulator (15), on described valve piece, be provided with another interface, the logical accumulator (15) in described another interface one end and delivery valve (18), other end connecting tee joint, a wherein termination pressure criteria module (3) of described three-way connection, also has an endmatcher case rear panel output interface to be connected with tested instrument.
6. pressure controller according to claim 1, it is characterized in that: the electric control system of described pressure control module (2) comprises pressure control driving circuit (20), range switch circuit (21) and central processing module (5), wherein central processing module (5) is controlled driving circuit (20) with pressure respectively, range switch circuit (21) is connected, and pressure is controlled driving circuit (20) other end and is connected with transfer valve (14), micro-adjusting mechanism (16), blowoff valve (17), delivery valve (18) respectively; Range switch circuit (21) is connected with pressure criteria module (3).
7. pressure controller according to claim 5, it is characterized in that: in described pressure criteria module (3), have a standard mounting blocks (25), it is provided with the pressure criteria sensor (26 that at least comprises two kinds of ranges, 27), two transfer valves (23 that described sensor is corresponding, 24), one end of described standard mounting blocks (25) is connected with described three-way connection, in the middle of standard mounting blocks (25), processing one through hole is by pressure piping and two transfer valves (23, 24) communicate, wherein the first pressure criteria sensor (26) is connected with the first transfer valve (23) by pressure piping, the second pressure criteria sensor (27) is connected with the second transfer valve (24) by pressure piping, first, second pressure criteria sensor (26,27) is also connected with central processing module (5), and central processing module (5) is connected to range switch circuit (21), and range switch circuit (21) is also connected with two transfer valves (23,24).
8. pressure controller according to claim 7, it is characterized in that: the signal processing unit of described pressure criteria module (3) comprises constant current source (28), D/A converting circuit A(29), microprocessor (30), RS232 communication chip (31), storage chip (32) and temperature survey chip (33), wherein the first pressure criteria sensor (26) and constant current source (28), D/A converting circuit A(29) be connected, D/A converting circuit A (29) other end is connected with microprocessor (30), microprocessor (30) and RS232 communication chip (31), storage chip (32) is connected with temperature survey chip (33), RS232 communication chip (31) other end takes back central processing module (5).
9. pressure controller according to claim 1, is characterized in that: described electrical measurement module (4) comprises electrical measurement management circuit (34), signal de-twitter circuit (35), two input protection circuits (36,42), two electrostatic discharge protection circuits (37,43), TVS array amplitude limiter circuit (41), signal filter circuit (40), D/A converting circuit B(39), electrical measurement management circuit (34) one end is connected with central processing module (5), the other end divides two-way, each road assembly is all for being connected in series, wherein a road series sequence is signal de-twitter circuit (35), the first input protection circuit (36), the first electrostatic discharge protection circuit (37), signal input port is tested switching signal input (38), another road series sequence is D/A converting circuit B(39), signal filter circuit (40), TVS array amplitude limiter circuit (41), the second input protection circuit (42), the second electrostatic discharge protection circuit (43), signal input port is tested electric signal input (44).
10. pressure controller according to claim 1, it is characterized in that: described central processing module (5) comprises MCU STM32 F103 (46), keyboard circuit (47), RS232 interface (48), temperature collection circuit (49), clock circuit (50), electric signal measurement circuit (51), display (52), pressure control circuit (53), pressure criteria commutation circuit (54), data storage circuitry (55), warning circuit (56), supply module (1) is connected with MCU STM32 F103 (46) central processing element, MCU STM32 F103 (46) respectively with keyboard circuit (47), RS232 interface (48), temperature collection circuit (49), clock circuit (50), electric signal measurement circuit (51), display (52), pressure control circuit (53), pressure criteria commutation circuit (54), data storage circuitry (55), warning circuit (56) is connected.
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| CN201410440097.8A CN104165728A (en) | 2014-09-01 | 2014-09-01 | Pressure controller high in accuracy |
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| CN201410440097.8A CN104165728A (en) | 2014-09-01 | 2014-09-01 | Pressure controller high in accuracy |
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| CN201410440097.8A Pending CN104165728A (en) | 2014-09-01 | 2014-09-01 | Pressure controller high in accuracy |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228737A (en) * | 2017-06-29 | 2017-10-03 | 温州福鑫仪表有限公司 | One kind automation pressure gauge |
| CN107870191A (en) * | 2016-09-27 | 2018-04-03 | 赛默飞世尔（上海）仪器有限公司 | Inside has the industrial board of operation and maintenance interface |
| CN109696276A (en) * | 2019-02-28 | 2019-04-30 | 唐山百川智能机器股份有限公司 | A kind of detection device of resistor-type locomotive pressure instrument |
| CN109900427A (en) * | 2019-04-15 | 2019-06-18 | 上海市计量测试技术研究院 | A kind of automated calibration system and calibration method for electric measuring type pressure gauge |
| CN112097992A (en) * | 2020-09-04 | 2020-12-18 | 苏州半山智能科技有限公司 | Double-isolation diaphragm type sanitary self-calibration pressure sensor |
| CN114336565A (en) * | 2022-03-10 | 2022-04-12 | 成都凯天电子股份有限公司 | Lightning protection device based on high-temperature silicon piezoresistive sensor and lightning protection method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2930059Y (en) * | 2006-08-01 | 2007-08-01 | 北京康斯特仪表科技有限公司 | Power supply/charging control circuit |
| CN101169345A (en) * | 2006-10-27 | 2008-04-30 | 北京康斯特仪表科技有限公司 | Digital pressure testers |
| CN102252805A (en) * | 2011-05-26 | 2011-11-23 | 北京康斯特仪表科技股份有限公司 | Multi-range field full-automatic pressure and electric signal calibrating instrument |
| CN103234698A (en) * | 2013-04-24 | 2013-08-07 | 南京化工职业技术学院 | Low-static pressure differential transmitter calibration instrument |
| CN204008003U (en) * | 2014-09-01 | 2014-12-10 | 北京斯贝克科技有限责任公司 | A kind of pin-point accuracy pressure controller |
-
2014
- 2014-09-01 CN CN201410440097.8A patent/CN104165728A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2930059Y (en) * | 2006-08-01 | 2007-08-01 | 北京康斯特仪表科技有限公司 | Power supply/charging control circuit |
| CN101169345A (en) * | 2006-10-27 | 2008-04-30 | 北京康斯特仪表科技有限公司 | Digital pressure testers |
| CN102252805A (en) * | 2011-05-26 | 2011-11-23 | 北京康斯特仪表科技股份有限公司 | Multi-range field full-automatic pressure and electric signal calibrating instrument |
| CN103234698A (en) * | 2013-04-24 | 2013-08-07 | 南京化工职业技术学院 | Low-static pressure differential transmitter calibration instrument |
| CN204008003U (en) * | 2014-09-01 | 2014-12-10 | 北京斯贝克科技有限责任公司 | A kind of pin-point accuracy pressure controller |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870191A (en) * | 2016-09-27 | 2018-04-03 | 赛默飞世尔（上海）仪器有限公司 | Inside has the industrial board of operation and maintenance interface |
| CN107870191B (en) * | 2016-09-27 | 2023-10-13 | 赛默飞世尔（上海）仪器有限公司 | Industrial machine with internal operation and maintenance interface |
| CN107228737A (en) * | 2017-06-29 | 2017-10-03 | 温州福鑫仪表有限公司 | One kind automation pressure gauge |
| CN109696276A (en) * | 2019-02-28 | 2019-04-30 | 唐山百川智能机器股份有限公司 | A kind of detection device of resistor-type locomotive pressure instrument |
| CN109900427A (en) * | 2019-04-15 | 2019-06-18 | 上海市计量测试技术研究院 | A kind of automated calibration system and calibration method for electric measuring type pressure gauge |
| CN112097992A (en) * | 2020-09-04 | 2020-12-18 | 苏州半山智能科技有限公司 | Double-isolation diaphragm type sanitary self-calibration pressure sensor |
| CN114336565A (en) * | 2022-03-10 | 2022-04-12 | 成都凯天电子股份有限公司 | Lightning protection device based on high-temperature silicon piezoresistive sensor and lightning protection method thereof |
| CN114336565B (en) * | 2022-03-10 | 2022-06-07 | 成都凯天电子股份有限公司 | Lightning protection device based on high-temperature silicon piezoresistive sensor and lightning protection method thereof |
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Application publication date: 20141126 |