CN106092439A - Multi-path pressure meter self-checking unit and self checking method thereof and self-checking system - Google Patents

Multi-path pressure meter self-checking unit and self checking method thereof and self-checking system Download PDF

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Publication number
CN106092439A
CN106092439A CN201610392531.9A CN201610392531A CN106092439A CN 106092439 A CN106092439 A CN 106092439A CN 201610392531 A CN201610392531 A CN 201610392531A CN 106092439 A CN106092439 A CN 106092439A
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China
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pressure
self
air
path
micro
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CN201610392531.9A
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Chinese (zh)
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CN106092439B (en
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蒲周平
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广州视源电子科技股份有限公司
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L27/00Testing or calibrating of apparatus for measuring fluid pressure
    • G01L27/002Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
    • G01L27/005Apparatus for calibrating pressure sensors

Abstract

The present invention relates to a kind of multi-path pressure meter self-checking unit and self checking method thereof and self-checking system, multi-path pressure meter self-checking unit, including self calibration module;Self calibration module includes multiple air operated reversing valve;Each air operated reversing valve is connected between air-capacitor and the pressure transducer of each passage of multi-path pressure meter;The manometric micro-control unit of pressure transducer connecting multi-channel;Self calibration module is also connected with micro-control unit;The present invention adds the function of self calibration passage on the basis of multi-path pressure meter.Retaining in the case of adjustable multiple piezometer function, when if desired internal pressure sensor being calibrated, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure transducer self calibration of all passages all can only in the connection of outside high-grade pressure gauge once property complete.

Description

Multi-path pressure meter self-checking unit and self checking method thereof and self-checking system

Technical field

The present invention relates to the sensor self calibration field in piezometer, particularly relate to a kind of multi-path pressure meter self-inspection dress Put and self checking method and self-checking system.

Background technology

In the blood pressure measurement process of producing product such as sphygomanometer, need to use high-precision piezometer that sphygomanometer pressure is surveyed Amount module is calibrated, to improve the pressure measurement accuracy of sphygomanometer.Meanwhile, as the instrument and equipment that blood pressure is demarcated, need Want periodically high-grade pressure gauge to be carried out self calibration, with satisfied use requirement.

Conventional art mainly uses following two scheme to calibrate sphygomanometer:

Scheme 1: use single channel high-grade pressure gauge that sphygomanometer is calibrated.During calibration, a high-grade pressure gauge It is connected to sphygomanometer, calibration man-to-man to sphygomanometer;

Scheme 2: use multi-path pressure meter frock that sphygomanometer is calibrated.During calibration, multiple stage sphygomanometer is connected to one In platform multi-path pressure meter frock, can multiple sphygomanometers be calibrated simultaneously.But, when needs are to multi-path pressure meter frock Pressure transducer when carrying out self calibration, then need to use high-grade pressure gauge that the pressure transducer of each passage is carried out successively Calibrate one by one.The pressure transducer self-alignment function diagram of scheme 2 multi-path pressure meter is as it is shown in figure 1, wherein in dotted line High-grade pressure gauge and air pump are interpreted as external equipment, and based on multi-path pressure, the pressure transducer self calibration of frock uses.

The multi-path pressure meter self calibration pressure transducer arrangement of scheme 2 is specific as follows:

1: the air-path interface of the high-grade pressure gauge in external equipment and air pump composition logical with multi-path pressure meter respectively Road connects, for the self calibration of channel pressure sensor.Such as, when needing passage 1 pressure transducer to multi-path pressure meter When carrying out self calibration, then outside air-path interface is connected with the interface of passage 1.By air pump or air compressor machine, passage is inflated, The pressure measuring value of passage 1 is compared by MCU or PC end with the measured value of high-grade pressure gauge, simultaneously by high-precision pressure The measured value of meter carrys out calibrated channel 1, to improve the precision of passage 1.The like, self calibration passage 2, passage 3, passage successively 4……

2: closely related with number of channels to the self-alignment number of times of pressure transducer of multi-path pressure meter, N number of logical when having During road, then need to carry out n times pressure transducer self calibration.

3: air pump is provided by external equipment, when the pressure transducer of multi-path pressure meter is calibrated, need simultaneously Use high-grade pressure gauge and air pump, wayward and use during use.

During realizing, inventor finds that in conventional art, at least there are the following problems:

When scheme 1 uses high accuracy to calibrate sphygomanometer, use cost is high, and the efficiency of calibration sphygomanometer is low, simultaneously Multiple high-grade pressure gauge is then needed when calibrating multiple sphygomanometer.And when periodically high-grade pressure gauge being carried out self calibration, high-precision Degree piezometer is the most general without self calibration passage or passage;The pressure transducer self calibration flow process of scheme 2 is loaded down with trivial details.Owing to needs are to many N number of channel pressure sensor of channel pressure meter carries out self calibration, and therefore self calibration number of times then needs n times by high-grade pressure gauge Connect respectively at each passage.

The concordance of passage self-inspection is poor.By environmental change, the impact including temperature, humidity, atmospheric pressure etc., if each passage Pressure transducer self calibration successively, the self-alignment reference value of each channel pressure sensor is the most variant, cause each passage it Between there is error.Meanwhile, affected by environment, high-grade pressure gauge is also having error the most in the same time.Ultimately result in each passage Concordance is deteriorated.Air pump control mode is difficult to compatible and controlled.Owing to using the air pump of external control circuit, when air pump and high-precision When degree piezometer is combined the pressure transducer using self calibration multi-path pressure meter.Air pump control and multichannel can be caused Manometric compatible variation.

Summary of the invention

Based on this, it is necessary to the problem high for Conventional gauges self-inspection scheme cost, operation is complicated and error is bigger, carry Supply a kind of multi-path pressure meter self-checking unit and self checking method thereof and self-checking system.

To achieve these goals, the embodiment of technical solution of the present invention is:

On the one hand, it is provided that a kind of multi-path pressure meter self-checking unit, including self calibration module;Self calibration module includes many Individual air operated reversing valve;Each air operated reversing valve is connected between air-capacitor and the pressure transducer of each passage of multi-path pressure meter; The manometric micro-control unit of pressure transducer connecting multi-channel;Self calibration module is also connected with micro-control unit;

The signal that micro-control unit exports when being connected to self calibration module based on high-grade pressure gauge, to self calibration module Send the first commutation control signal, air pressure control signal;

Air operated reversing valve, according to the first commutation control signal, blocks air operated reversing valve and connects the first gas channels of air-capacitor, Conducting air operated reversing valve connects the second gas channels of pressure transducer;

Self calibration module, according to air pressure control signal, carries out air pressure control to the gas in the second gas channels;

Pressure transducer and high-grade pressure gauge change according to the pressure of gas respectively, corresponding to micro-control unit output Measured value;The micro-control unit measured value according to high-grade pressure gauge and the measured value of pressure transducer, to multi-path pressure meter Carry out pressure self calibration.

On the other hand, it is provided that a kind of multi-path pressure meter self checking method, including step:

It is being connected to high-precision pressure timing, is being sent to the micro-control unit of multi-path pressure meter by high-grade pressure gauge Output signal;The first commutation control signal gentle pressure control signal is sent respectively according to output signal by micro-control unit;

According to the first commutation control signal, block the first gas circuit of the high-grade pressure gauge each air-capacitor of connecting multi-channel piezometer Passage, the second gas channels of the conducting high-grade pressure gauge each pressure transducer of connecting multi-channel piezometer;

According to air pressure control signal, the gas in the second gas channels is carried out air pressure control;

Changed according to the pressure of gas respectively by pressure transducer and high-grade pressure gauge, corresponding to micro-control unit output Measured value;And by the micro-control unit measured value according to high-grade pressure gauge and the measured value of pressure transducer, to multichannel Piezometer carries out pressure self calibration.

On the other hand, additionally provide a kind of multi-path pressure meter self-checking system, including:

Interface module, for being connected to high-precision pressure timing, by high-grade pressure gauge to multi-path pressure meter Micro-control unit sends output signal;The first commutation control signal and air pressure is sent respectively according to output signal by micro-control unit Control signal;

Pneumatic inverting module, for according to the first commutation control signal, blocks high-grade pressure gauge connecting multi-channel pressure Count the first gas channels of each air-capacitor, the second gas circuit of the conducting high-grade pressure gauge each pressure transducer of connecting multi-channel piezometer Passage;

Air pressure control module, for according to air pressure control signal, carries out air pressure control to the gas in the second gas channels; Changed according to the pressure of gas respectively by pressure transducer and high-grade pressure gauge, to the corresponding measurement of micro-control unit output Value;And by the micro-control unit measured value according to high-grade pressure gauge and the measured value of pressure transducer, to multi-path pressure meter Carry out pressure self calibration.

Technique scheme has the advantages that

Multi-path pressure meter self-checking unit of the present invention and self checking method thereof and self-checking system, on the basis of multi-path pressure meter On add the function of self calibration passage.In the case of retaining adjustable multiple piezometer function, if desired to internal pressure When sensor is calibrated, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure of all passages passes Sensor self calibration all can only in the connection of outside high-grade pressure gauge once property complete.The present invention is simple to operate, self-inspection time Number is not affected by number of channels, it is possible to ensure the concordance that all channel pressures are measured, and controls compatibility and well and controls more square Just.

Accompanying drawing explanation

By being more particularly described of the preferred embodiments of the present invention shown in accompanying drawing, the above and other mesh of the present invention , feature and advantage will become more fully apparent.The part that reference instruction identical in whole accompanying drawings is identical, and do not carve Meaning draws accompanying drawing by actual size equal proportion scaling, it is preferred that emphasis is illustrate the purport of the present invention.

Fig. 1 be multi-path pressure meter in conventional art pressure transducer self calibration in the most self-alignment merit of single passage Can schematic diagram;

Fig. 2 is the structural representation of multi-path pressure meter self-checking unit embodiment 1 of the present invention;

Fig. 3 is the structural representation of multi-path pressure meter self-checking unit one specific embodiment of the present invention;

Fig. 4 is function during pressure transducer self calibration in multi-path pressure meter self-checking unit one specific embodiment of the present invention Structural representation;

Fig. 5 is that in multi-path pressure meter self-checking unit one specific embodiment of the present invention, pressure transducer self calibration completes laggard The tonometric illustrative view of functional configuration of row;

Fig. 6 is the schematic flow sheet of multi-path pressure meter self checking method embodiment 1 of the present invention;

Fig. 7 is the structural representation of multi-path pressure meter self-checking system embodiment 1 of the present invention.

Detailed description of the invention

For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing Give the first-selected embodiment of the present invention.But, the present invention can realize in many different forms, however it is not limited to institute herein The embodiment described.On the contrary, providing the purpose of these embodiments is to make to the disclosure more thoroughly comprehensively.

It should be noted that when an element is considered as " connection " another element, and it can be directly to separately One element also in combination is integrated, or may be simultaneously present centering elements.Term as used herein " is connected ", " one end ", " other end " and similar statement are for illustrative purposes only.

Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the present invention The implication that technical staff is generally understood that is identical.The term used the most in the description of the invention is intended merely to describe tool The purpose of the embodiment of body, it is not intended that in limiting the present invention.Term as used herein " and/or " include one or more phase Arbitrary and all of combination of the Listed Items closed.

Multi-path pressure meter self-checking unit embodiment 1 of the present invention:

In order to solve the problem that Conventional gauges self-inspection scheme cost is high, operation is complicated and error is bigger, the present invention provides A kind of multi-path pressure meter self-checking unit embodiment 1, Fig. 2 is the knot of multi-path pressure meter self-checking unit embodiment 1 of the present invention Structure schematic diagram;As in figure 2 it is shown, self calibration module 210 can be included;Self calibration module includes multiple air operated reversing valve 218;Each gas Dynamic reversal valve 218 is connected between air-capacitor 110 and the pressure transducer 120 of each passage of multi-path pressure meter;Pressure sensing The manometric micro-control unit of device 120 connecting multi-channel;Self calibration module 210 is also connected with micro-control unit;

The signal that micro-control unit exports when being connected to self calibration module 210 based on high-grade pressure gauge 130, to self-correcting Quasi-mode block 210 sends the first commutation control signal, air pressure control signal;

Air operated reversing valve 218, according to the first commutation control signal, blocks air operated reversing valve 218 and connects the first of air-capacitor 110 Gas channels, conducting air operated reversing valve connects the second gas channels of pressure transducer 120;

Self calibration module 210, according to air pressure control signal, carries out air pressure control to the gas in the second gas channels;

Pressure transducer 120 and high-grade pressure gauge 130 change according to the pressure of gas respectively, export to micro-control unit Corresponding measured value;The micro-control unit measured value according to high-grade pressure gauge 130 and 120 measured values of pressure transducer, right Multi-path pressure meter carries out pressure self calibration.

Micro-control unit (Microcontroller Unit;MCU) one chip microcomputer or single-chip microcomputer can be referred to;? When needing that the pressure transducer of multi-path pressure meter is carried out self calibration, all Channel Synchronous self calibrations, disposably complete.Avoid The mode of traditional manual operation switching channel, decreases the impact of anthropic factor;The present embodiment can be applicable to 8 passages, 16 More multichannel self-calibration system and the device such as passages, all can realize synchronizing self calibration;Self calibration is that all Channel Synchronous complete, row Except the differentiation of ambient temperature, humidity, atmospheric pressure affects.After the most all passage self calibrations complete, the pressure of each passage Concordance is more preferable;Use cost is low, can meet multi-path pressure meter and calibrate the function of multiple stage sphygomanometer simultaneously, can realize again institute Pressure transducer passage self calibration is had disposably to complete.

In a specific embodiment, self calibration module includes self calibration interface 212, the gas container 214 being sequentially connected with And air compression plant 216;Gas container 214 is connected with the air operated reversing valve 218 of each passage of multi-path pressure meter;Pneumatic Reversal valve 218 is connected between the air-capacitor 110 of passage and pressure transducer 120;Pressure transducer 120 connecting multi-channel piezometer Micro-control unit;Air compression plant 216 is also connected with micro-control unit;

The signal that micro-control unit exports when being connected to self calibration interface 212 based on high-grade pressure gauge 130, respectively to Air operated reversing valve 218 sends the first commutation control signal, sends air pressure control signal to air compression plant 216;

Air operated reversing valve 218, according to the first commutation control signal, blocks gas container 214 and connects the first gas of each air-capacitor 110 Paths, conducting gas container 214 connects the second gas channels of each pressure transducer 120;

Air compression plant 216, according to air pressure control signal, carries out air pressure control to the gas in the second gas channels;

Pressure transducer 120 and high-grade pressure gauge 130 change according to the pressure of gas respectively, export to micro-control unit Corresponding measured value;The micro-control unit measured value according to high-grade pressure gauge and the measured value of pressure transducer, to multichannel Piezometer carries out pressure self calibration.

Specifically, gas container 214 can refer to gas container, the i.e. air-capacitor of self calibration module.

In a specific embodiment, micro-control unit sends second when pressure self calibration completes to air operated reversing valve Commutation control signal;

Air operated reversing valve, according to the second commutation control signal, blocks the second gas channels, turns on the first gas channels.

Specifically, after multi-path pressure meter self calibration completes, control each passage by micro-control unit with PC computer Air operated reversing valve, make each passage be connected with the pressure transducer gas circuit of corresponding each passage respectively.And each passage now due to The effect of air operated reversing valve, in gas circuit, each passage disconnects with the gas channels of self calibration interface.Therefore multi-path pressure meter The most independent, normal pressure measxurement can be carried out.

In a specific embodiment, air operated reversing valve is two-bit triplet pneumatic operated valve.Use two-bit triplet air valve, will pass The gas circuit of sensor self calibration gas circuit and each channel pressure Measurement channel is separately.

In a specific embodiment, air compression plant is air pump or air compressor.Air pump or air compressor machine with Multi-path pressure meter is combined into a device, and the compatibility eliminating outside air pump and multi-path pressure meter control circuit is asked Topic.

Multi-path pressure meter self-checking unit embodiment 1 of the present invention, adds self calibration on the basis of multi-path pressure meter The function of passage.In the case of retaining adjustable multiple piezometer function, if desired internal pressure sensor is calibrated Time, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure transducer self calibration of all passages Only in the connection of outside high-grade pressure gauge, once property completes.The present invention is simple to operate, and self-inspection number of times is not by number of channels Impact, it is possible to ensure the concordance that all channel pressures are measured, control compatibility good and control more convenient.

In order to technical scheme is expanded on further, special as a example by a specific embodiment of the application present invention, explanation The technical thought of the present invention.Fig. 3 is the structural representation of multi-path pressure meter self-checking unit one specific embodiment of the present invention;Such as figure Shown in 3: multichannel self-checking unit mainly can include following sections:

1: piezometer channel interface (passage 1-4), self calibration interface, air-capacitor, two-bit triplet air valve, air pump, pressure sensing Device (pressure interface end) all can couple together according to the mode plastics gas conduit of Fig. 3 or hollow steel pipe.Self calibration interface After being connected with air-capacitor and air pump, the most also the gas circuit with the two-bit triplet air valve of corresponding all passages is connected.

2: pressure transducer (electrical connections), air pump control part, micro-control unit or are led by board with PC computer Line is electrically connected.

When needing the pressure transducer of multi-path pressure meter is carried out self calibration.By the high-grade pressure gauge of external equipment Gas circuit is connected with self calibration interface.The gas circuit of micro-control unit controls two-bit triplet air valve, makes gas circuit and the institute of self calibration interface The pressure transducer having passage connects.Now the air-path interface of passage 1-4 is closed, and function equivalent block diagram is as shown in Figure 4;Fig. 4 For illustrative view of functional configuration during pressure transducer self calibration in multi-path pressure meter self-checking unit one specific embodiment of the present invention; Such as Fig. 4, now the air pump of micro-control unit and PC computer control multi-path pressure meter is inflated, or uses air compressor machine to enter gas circuit Row pressure changes.Micro-control unit and PC computer pass through measured value and the measurement of pressure transducer of comparison high-grade pressure gauge Value, thus reach to synchronize self-alignment purpose, this synchronization self calibration can disposably complete the pressure of all channel pressure sensor Self calibration.

After multi-path pressure meter self calibration completes, controlled the two-bit triplet of each passage by micro-control unit and PC computer Air valve, makes passage 1-4 be connected with the pressure transducer gas circuit of corresponding each passage respectively.And each passage is now due to two-bit triplet The effect of air valve, in gas circuit, each passage disconnects with the gas channels of self calibration interface.Therefore multi-path pressure score is the most each From independence, can carry out normal pressure measxurement, pressure transducer self calibration enters pressure measuring function simplification figure such as Fig. 5 after completing Shown in, Fig. 5 is that in multi-path pressure meter self-checking unit one specific embodiment of the present invention, pressure transducer self calibration is carried out after completing Tonometric illustrative view of functional configuration;

The specific embodiment of multichannel self-checking unit of the present invention, uses pressure transducer to synchronize self-alignment mode, manifold Pressure transducer all pressure channels self calibration number of times in road has only to once can complete;Use two-bit triplet air valve, will sensing The gas circuit of device self calibration gas circuit and each channel pressure Measurement channel is separately;Air pump control or air compressor machine are controlled part place Or be arranged in multi-path pressure meter, get rid of air pump etc. and control incompatibility problem.

Simple to operate, when needing the pressure transducer of multi-path pressure meter is carried out self calibration, all Channel Synchronous are certainly Calibration, disposably completes.Avoid the mode of traditional manual operation switching channel, decrease the impact of anthropic factor;Self-inspection Number of times is not affected by number of channels, the embodiment of the present invention can be applicable to the more multichannel self-calibration system such as 8 passages, 16 passages and Device, all can realize synchronizing self calibration;It is more preferable that all channel pressures measure concordance, and self calibration is that all Channel Synchronous complete, Eliminate the differentiation impact of ambient temperature, humidity, atmospheric pressure.After the most all passage self calibrations complete, the pressure of each passage Power concordance is more preferable;Control compatible more preferable, control more convenient: air pump or air compressor machine are combined into one with multi-path pressure meter Individual device, eliminates the compatibility issue of outside air pump and multi-path pressure meter control circuit;Use cost is lower, can meet The function of multiple stage sphygomanometer calibrated by multi-path pressure meter simultaneously, can realize again all pressure transducer passage self calibrations the completeest Become.

Multi-path pressure meter self checking method embodiment 1 of the present invention:

In order to solve the problem that Conventional gauges self-inspection scheme cost is high, operation is complicated and error is bigger, the present invention also carries Having supplied a kind of multi-path pressure meter self checking method embodiment 1, Fig. 6 is multi-path pressure meter self checking method embodiment 1 of the present invention Schematic flow sheet;As shown in Figure 6, may comprise steps of:

Step S610: be connected to high-precision pressure timing, by high-grade pressure gauge to the micro-control of multi-path pressure meter Unit processed sends output signal;Sent the first commutation control signal respectively according to output signal by micro-control unit and air pressure controls Signal;

Step S620: according to the first commutation control signal, blocks the high-grade pressure gauge each air-capacitor of connecting multi-channel piezometer The first gas channels, conducting the high-grade pressure gauge each pressure transducer of connecting multi-channel piezometer the second gas channels;

Step S630: according to air pressure control signal, the gas in the second gas channels is carried out air pressure control;

Step S640: changed, to microcontroller list according to the pressure of gas respectively by pressure transducer and high-grade pressure gauge Unit exports corresponding measured value;And by the micro-control unit measured value according to high-grade pressure gauge and the measurement of pressure transducer Value, carries out pressure self calibration to multi-path pressure meter.

In a specific embodiment, it is also possible to include step:

According to the second commutation control signal, block the second gas channels, turn on the first gas channels;Wherein, the second commutation Control signal is that micro-control unit sends when pressure self calibration completes.

Multi-path pressure meter self checking method embodiment 1 of the present invention, adds self calibration on the basis of multi-path pressure meter The function of passage.In the case of retaining adjustable multiple piezometer function, if desired internal pressure sensor is calibrated Time, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure transducer self calibration of all passages Only in the connection of outside high-grade pressure gauge, once property completes.The present invention is simple to operate, and self-inspection number of times is not by number of channels Impact, it is possible to ensure the concordance that all channel pressures are measured, control compatibility good and control more convenient.

Multi-path pressure meter self-checking system embodiment 1 of the present invention:

Technological thought based on above multi-path pressure meter self checking method, simultaneously in order to solve Conventional gauges self-inspection scheme The problem that cost is high, operation is complicated and error is bigger, present invention also offers a kind of multi-path pressure meter self-checking system embodiment 1;Fig. 7 is the structural representation of multi-path pressure meter self-checking system embodiment 1 of the present invention;As it is shown in fig. 7, may include that

Interface module 710, for being connected to high-precision pressure timing, by high-grade pressure gauge to multi-path pressure meter Micro-control unit send output signal;The first commutation control signal is sent respectively according to output signal gentle by micro-control unit Pressure control signal;

Pneumatic inverting module 720, for according to the first commutation control signal, blocks high-grade pressure gauge connecting multi-channel pressure First gas channels of each air-capacitor of power meter, the second gas of the conducting high-grade pressure gauge each pressure transducer of connecting multi-channel piezometer Paths;

Air pressure control module 730, for according to air pressure control signal, carries out air pressure control to the gas in the second gas channels System;Changed according to the pressure of gas respectively by pressure transducer and high-grade pressure gauge, to the corresponding survey of micro-control unit output Value;And by the micro-control unit measured value according to high-grade pressure gauge and the measured value of pressure transducer, to multi-path pressure Meter carries out pressure self calibration.

In a specific embodiment, pneumatic inverting module 720, for according to the second commutation control signal, block the Two gas channels, turn on the first gas channels;Wherein, the second commutation control signal is that micro-control unit completes at pressure self calibration Time send.

In a specific embodiment, pneumatic inverting module 720, for by control two-bit triplet pneumatic operated valve turn on or Block the first gas channels and the second gas channels.

Multi-path pressure meter self-checking system embodiment 1 of the present invention, adds self calibration on the basis of multi-path pressure meter The function of passage.In the case of retaining adjustable multiple piezometer function, if desired internal pressure sensor is calibrated Time, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure transducer self calibration of all passages Only in the connection of outside high-grade pressure gauge, once property completes.The present invention is simple to operate, and self-inspection number of times is not by number of channels Impact, it is possible to ensure the concordance that all channel pressures are measured, control compatibility good and control more convenient.

Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited In contradiction, all it is considered to be the scope that this specification is recorded.

Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (10)

1. a multi-path pressure meter self-checking unit, it is characterised in that include self calibration module;Described self calibration module includes many Individual air operated reversing valve;Each described air operated reversing valve be connected to the air-capacitor of each passage of multi-path pressure meter and pressure transducer it Between;Described pressure transducer connects the micro-control unit of described multi-path pressure meter;Described self calibration module also with described micro-control Unit processed is connected;
The signal that described micro-control unit exports when being connected to described self calibration module based on high-grade pressure gauge, to described from Calibration module sends the first commutation control signal, air pressure control signal;
Described air operated reversing valve according to described first commutation control signal, blocks described air operated reversing valve and connects the of described air-capacitor One gas channels, turns on described air operated reversing valve and connects the second gas channels of described pressure transducer;
Described self calibration module, according to described air pressure control signal, carries out air pressure control to the gas in described second gas channels System;
Described pressure transducer and described high-grade pressure gauge change, to described microcontroller list according to the pressure of described gas respectively Unit exports corresponding measured value;Described micro-control unit is according to the measured value of described high-grade pressure gauge and described pressure transducer Measured value, described multi-path pressure meter is carried out pressure self calibration.
Multi-path pressure meter self-checking unit the most according to claim 1, it is characterised in that described self calibration module also includes Self calibration interface, gas container and the air compression plant being sequentially connected with;Described gas container is connected with each described air operated reversing valve Connect;Described air compression plant is connected with described micro-control unit;
The signal that described micro-control unit exports when being connected to described self calibration interface based on described high-grade pressure gauge, sends Described first commutation control signal, described air pressure control signal;
Described air operated reversing valve, according to described first commutation control signal, blocks described gas container and connects the described of each described air-capacitor First gas channels, turns on described gas container and connects described second gas channels of each described pressure transducer;
Described air compression plant, according to described air pressure control signal, carries out air pressure control to the gas in described second gas channels System.
Multi-path pressure meter self-checking unit the most according to claim 2, it is characterised in that described air compression plant is gas Pump or air compressor.
Multi-path pressure meter self-checking unit the most according to claim 1, it is characterised in that
Described micro-control unit sends the second commutation control signal when described pressure self calibration completes to described air operated reversing valve;
Described air operated reversing valve, according to described second commutation control signal, blocks described second gas channels, turns on described first Gas channels.
5. according to the multi-path pressure meter self-checking unit described in Claims 1-4 any one, it is characterised in that described pneumatic Reversal valve is two-bit triplet pneumatic operated valve.
6. a multi-path pressure meter self checking method, it is characterised in that include step:
It is being connected to high-precision pressure timing, is being sent to the micro-control unit of multi-path pressure meter by described high-grade pressure gauge Output signal;The first commutation control signal and air pressure control letter is sent respectively according to described output signal by described micro-control unit Number;
According to described first commutation control signal, block described high-grade pressure gauge and connect the described each air-capacitor of multi-path pressure meter First gas channels, the second gas circuit turning on the described high-grade pressure gauge described each pressure transducer of multi-path pressure meter of connection is led to Road;
According to described air pressure control signal, the gas in described second gas channels is carried out air pressure control;
Changed, to described microcontroller according to the pressure of described gas respectively by described pressure transducer and described high-grade pressure gauge Unit exports corresponding measured value;And by described micro-control unit according to the measured value of described high-grade pressure gauge and described pressure The measured value of sensor, carries out pressure self calibration to described multi-path pressure meter.
Multi-path pressure meter self checking method the most according to claim 6, it is characterised in that further comprise the steps of:
According to the second commutation control signal, block described second gas channels, turn on described first gas channels;Wherein, described Second commutation control signal is that described micro-control unit sends when described pressure self calibration completes.
8. a multi-path pressure meter self-checking system, it is characterised in that including:
Interface module, for being connected to high-precision pressure timing, by described high-grade pressure gauge to multi-path pressure meter Micro-control unit sends output signal;The first commutation control letter is sent respectively according to described output signal by described micro-control unit Number gentle pressure control signal;
Pneumatic inverting module, for according to described first commutation control signal, blocks described high-grade pressure gauge and connects described many First gas channels of each air-capacitor of channel pressure meter, turns on described high-grade pressure gauge and connects the described each pressure of multi-path pressure meter Second gas channels of sensor;
Air pressure control module, for according to described air pressure control signal, carries out air pressure to the gas in described second gas channels Control;Changed, to described micro-control according to the pressure of described gas respectively by described pressure transducer and described high-grade pressure gauge Unit processed exports corresponding measured value;And by described micro-control unit according to the measured value of described high-grade pressure gauge and described pressure The measured value of force transducer, carries out pressure self calibration to described multi-path pressure meter.
Multi-path pressure meter self-checking system the most according to claim 8, it is characterised in that:
Described pneumatic inverting module, for according to the second commutation control signal, blocks described second gas channels, turns on described the One gas channels;Wherein, described second commutation control signal is that described micro-control unit is sent out when described pressure self calibration completes Go out.
Multi-path pressure meter self-checking system the most according to claim 8 or claim 9, it is characterised in that:
Described pneumatic inverting module, for by controlling the conducting of two-bit triplet pneumatic operated valve or blocking described first gas channels and institute State the second gas channels.
CN201610392531.9A 2016-06-02 2016-06-02 Multi-path pressure meter self-checking unit and its self checking method and self-checking system CN106092439B (en)

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