CN106092439B - Multi-path pressure meter self-checking unit and its self checking method and self-checking system - Google Patents

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

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Publication number
CN106092439B
CN106092439B CN201610392531.9A CN201610392531A CN106092439B CN 106092439 B CN106092439 B CN 106092439B CN 201610392531 A CN201610392531 A CN 201610392531A CN 106092439 B CN106092439 B CN 106092439B
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China
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pressure
self
gas
path
micro
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CN201610392531.9A
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Chinese (zh)
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CN106092439A (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 its self checking method and self-checking system, multi-path pressure meter self-checking unit, including self calibration module;Self calibration module includes multiple air operated reversing valves;The gas that each air operated reversing valve is connected to each channel of multi-path pressure meter holds between pressure sensor;The micro-control unit of pressure sensor connecting multi-channel pressure gauge;Self calibration module is also connected with micro-control unit;The present invention increases the function in self calibration channel on the basis of multi-path pressure meter.In the case where retaining the multiple pressure gauge functions of adjustable, when if desired calibrating to internal pressure sensor, effectively and multi-path pressure sensor self calibration can be rapidly performed by.The pressure sensor self calibration in all channels only can be completed disposably in the connection of external high-grade pressure gauge.

Description

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

Technical field

The present invention relates to the sensor self calibration fields in pressure gauge, fill more particularly to a kind of multi-path pressure meter self-test It sets and its self checking method and self-checking system.

Background technique

In the blood pressure measurements process of producing product such as sphygmomanometer, need to survey sphygmomanometer pressure using high-precision pressure gauge Amount module is calibrated, to improve the pressure measurement accuracy of sphygmomanometer.Meanwhile for the instrument and equipment demarcated as blood pressure, need Self calibration periodically is carried out to high-grade pressure gauge, to meet requirement.

Traditional technology mainly uses following two scheme to calibrate sphygmomanometer:

Scheme 1: sphygmomanometer is calibrated using single channel high-grade pressure gauge.When calibration, a high-grade pressure gauge It is connected to sphygmomanometer, to the one-to-one calibration of sphygmomanometer;

Scheme 2: sphygmomanometer is calibrated using multi-path pressure meter tooling.When calibration, more sphygmomanometers are connected to one In platform multi-path pressure meter tooling, multiple sphygmomanometers can be calibrated simultaneously.But when needing to multi-path pressure meter tooling Pressure sensor when carrying out self calibration, then need successively to carry out the pressure sensor in each channel using high-grade pressure gauge It calibrates one by one.The self-alignment function diagram of the pressure sensor of 2 multi-path pressure meter of scheme is as shown in Figure 1, wherein in dotted line High-grade pressure gauge and air pump are interpreted as external equipment, and the pressure sensor self calibration of tooling uses based on multi-path pressure.

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

1: the air-path interface of high-grade pressure gauge and air pump composition in external equipment is logical with multi-path pressure meter respectively Road connection, the self calibration for channel pressure sensor.For example, when needing 1 pressure sensor of channel to multi-path pressure meter When carrying out self calibration, then external air-path interface is connected with the interface in channel 1.It is inflated by air pump or air compressor machine to channel, The end MCU PC is compared the pressure measuring value in channel 1 with the measured value of high-grade pressure gauge, while by high-precision pressure The measured value of meter carrys out calibrated channel 1, to improve the precision in channel 1.And so on, successively self calibration channel 2, channel 3, channel 4……

2: it is closely related to the self-alignment number of the pressure sensor of multi-path pressure meter and number of channels, it is N number of logical when having When road, then need to carry out n times pressure sensor self calibration.

3: air pump is provided by external equipment, when the pressure sensor to multi-path pressure meter is calibrated, is needed simultaneously Using high-grade pressure gauge and air pump, when use, is not easy to control and uses.

During realization, inventor has found that at least there are the following problems in traditional technology:

When scheme 1 calibrates sphygmomanometer using high-precision, use cost is high, calibrates the low efficiency of sphygmomanometer, simultaneously Multiple high-grade pressure gauges are then needed when calibrating multiple sphygmomanometers.It is high-precision and when periodically carrying out self calibration to high-grade pressure gauge It is not general without self calibration channel or channel to spend pressure gauge;The pressure sensor self calibration process of scheme 2 is cumbersome.Due to needing to more N number of channel pressure sensor of channel pressure meter carries out self calibration, therefore self calibration number then needs n times by high-grade pressure gauge It is connected respectively at each channel.

The consistency of channel self-test is poor.By environmental change, the influence including temperature, humidity, atmospheric pressure etc., if each channel Pressure sensor successively self calibration, each self-alignment reference value of channel pressure sensor is variant, cause each channel it Between there are errors.Meanwhile it is affected by environment, high-grade pressure gauge also has error in different moments.Eventually lead to each channel Consistency is deteriorated.Air pump control mode is not easy compatible and controlled.Due to the air pump using external control circuit, when air pump and high-precision When degree pressure gauge is combined using the pressure sensor for carrying out self calibration multi-path pressure meter.It will lead to air pump control and multichannel The compatibility of pressure gauge is deteriorated.

Summary of the invention

Based on this, it is necessary to for Conventional gauges self-test scheme problem at high cost, complicated for operation and larger error, mention For a kind of multi-path pressure meter self-checking unit and its self checking method and self-checking system.

To achieve the goals above, the embodiment of technical solution of the present invention are as follows:

On the one hand, a kind of multi-path pressure meter self-checking unit, including self calibration module are provided;Self calibration module includes more A air operated reversing valve;The gas that each air operated reversing valve is connected to each channel of multi-path pressure meter holds between pressure sensor; The micro-control unit of pressure sensor connecting multi-channel pressure gauge;Self calibration module is also connected with micro-control unit;

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

Air operated reversing valve is according to the first commutation control signal, the first gas channels for blocking air operated reversing valve connection gas to hold, The second gas channels of air operated reversing valve connection pressure sensor are connected;

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

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

On the other hand, a kind of multi-path pressure meter self checking method is provided, comprising steps of

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

According to the first commutation control signal, the first gas circuit for blocking each gas of high-grade pressure gauge connecting multi-channel pressure gauge to hold The second gas channels of each pressure sensor of high-grade pressure gauge connecting multi-channel pressure gauge are connected in channel;

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

By pressure sensor and high-grade pressure gauge respectively according to the pressure change of gas, answered to micro-control unit output phase Measured value;And by micro-control unit according to the measured value of high-grade pressure gauge and the measured value of pressure sensor, to multichannel Pressure gauge carries out pressure self calibration.

On the other hand, a kind of multi-path pressure meter self-checking system is additionally provided, comprising:

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;Issue the first commutation control signal and air pressure respectively according to output signal by micro-control unit Control signal;

Pneumatic inverting module, for blocking high-grade pressure gauge connecting multi-channel pressure according to the first commutation control signal The first gas channels that each gas holds are counted, the second gas circuit of each pressure sensor of high-grade pressure gauge connecting multi-channel pressure gauge is connected Channel;

Air pressure control module, for carrying out pressure control to the gas in the second gas channels according to pressure control signal; By pressure sensor and high-grade pressure gauge respectively according to the pressure change of gas, corresponding measurement is exported to micro-control unit Value;And by micro-control unit according to the measured value of high-grade pressure gauge and the measured value of pressure sensor, to multi-path pressure meter Carry out pressure self calibration.

Above-mentioned technical proposal has the following beneficial effects:

Multi-path pressure meter self-checking unit and its self checking method of the present invention and self-checking system, on the basis of multi-path pressure meter On increase the function in self calibration channel.In the case where reservation adjustable multiple pressure gauge functions, if desired to internal pressure When sensor is calibrated, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure in all channels passes Sensor self calibration only can be completed disposably in the connection of external high-grade pressure gauge.Operation of the present invention is simple, self-test time Number is not influenced by number of channels, can guarantee the consistency of all channel pressure measurements, controls good compatibility and control is more square Just.

Detailed description of the invention

By being more particularly described for the preferred embodiment of the present invention shown in the drawings, above and other mesh of the invention , feature and advantage will become more fully apparent.Identical appended drawing reference indicates identical part in all the attached drawings, and does not carve Meaning draws attached drawing by actual size equal proportion scaling, it is preferred that emphasis is shows the gist of the present invention.

Fig. 1 is single channel successively self-alignment function in the pressure sensor self calibration of multi-path pressure meter in traditional technology It can schematic diagram;

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

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

Function when Fig. 4 is pressure sensor self calibration in one specific embodiment of multi-path pressure meter self-checking unit of the present invention Structural schematic diagram;

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

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

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

Specific embodiment

To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.

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

Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases Any and all combinations of the listed item of pass.

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

In order to solve the problems, such as that Conventional gauges self-test scheme is at high cost, complicated for operation and error is larger, the present invention is provided A kind of multi-path pressure meter self-checking unit embodiment 1, Fig. 2 are the knot of multi-path pressure meter self-checking unit embodiment 1 of the present invention Structure schematic diagram;As shown in Fig. 2, may include self calibration module 210;Self calibration module includes multiple air operated reversing valves 218;Each gas The gas that dynamic reversal valve 218 is connected to each channel of multi-path pressure meter holds between 110 and pressure sensor 120;Pressure sensing The micro-control unit of 120 connecting multi-channel pressure gauge of device;Self calibration module 210 is also connected with micro-control unit;

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

Air operated reversing valve 218 blocks air operated reversing valve 218 to connect gas holds 110 first according to the first commutation control signal Gas channels, the second gas channels of conducting air operated reversing valve connection pressure sensor 120;

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

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

Micro-control unit (Microcontroller Unit;MCU it) can refer to one chip microcomputer or single-chip microcontroller;? When needing to carry out self calibration to the pressure sensor of multi-path pressure meter, all Channel Synchronous self calibrations are disposable to complete.It avoids The mode of traditional manual operation switching channel, reduces the influence of human factor;The present embodiment can be applicable to 8 channels, 16 Synchronous self calibration can be achieved in more multichannel self-calibration system and the device such as channel;Self calibration is that all Channel Synchronous are completed, row In addition to the differentiation of environment temperature, humidity, atmospheric pressure influences.Therefore after the completion of all channel self calibrations, the pressure in each channel Consistency is more preferable;Use cost is low, has not only been able to satisfy multi-path pressure meter while having calibrated the function of more sphygmomanometers, but also has been able to achieve institute There is pressure sensor channel self calibration disposably to complete.

In a specific embodiment, self calibration module includes sequentially connected self calibration interface, gas container and sky Air pressure compression apparatus;Gas container is connected with the air operated reversing valve 218 in each channel of multi-path pressure meter;Air operated reversing valve 218 connects The gas in channel is connect to hold between 110 and pressure sensor 120;The microcontroller list of 120 connecting multi-channel pressure gauge of pressure sensor Member;Air compression plant is also connected with micro-control unit;

The signal that micro-control unit is exported based on high-grade pressure gauge 130 when being connected to self calibration interface, respectively to gas Dynamic reversal valve 218 issues the first commutation control signal, issues pressure control signal to air compression plant;

For air operated reversing valve 218 according to the first commutation control signal, the first gas circuit for blocking gas container to connect each gas appearance 110 is logical Road, conducting gas container connect the second gas channels of each pressure sensor 120;

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

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

Specifically, gas container can refer to that gas container, the i.e. gas of self calibration module hold.

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

Air operated reversing valve blocks the second gas channels according to the second commutation control signal, and the first gas channels are connected.

Specifically, controlling each channel by micro-control unit and PC computer after the completion of multi-path pressure meter self calibration Air operated reversing valve, make each channel respectively with the pressure sensor gas circuit in corresponding each channel be connected.And each channel at this time due to The effect of air operated reversing valve, each channel and the gas channels of self calibration interface have disconnected in gas circuit.Therefore multi-path pressure meter It is respectively independent respectively, normal pressure measurement can be carried out.

In a specific embodiment, air operated reversing valve is two-bit triplet pneumatic operated valve.Using two-bit triplet air valve, will pass Sensor self calibration gas circuit and the gas circuit of each channel pressure Measurement channel separate.

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, eliminates external air pump and the compatibility of multi-path pressure meter control circuit is asked Topic.

Multi-path pressure meter self-checking unit embodiment 1 of the present invention, increases self calibration on the basis of multi-path pressure meter The function in channel.In the case where reservation adjustable multiple pressure gauge functions, if desired internal pressure sensor is calibrated When, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure sensor self calibration in all channels Only disposably completed in the connection of external high-grade pressure gauge.Operation of the present invention is simple, and self-test number is not by number of channels Influence, can guarantee the consistency of all channel pressures measurement, control good compatibility and control is more convenient.

It is special by taking an application specific embodiment of the invention as an example for the technical solution that the present invention is further explained, explanation Technical thought of the invention.Fig. 3 is the structural schematic diagram of one specific embodiment of multi-path pressure meter self-checking unit of the present invention;Such as figure Shown in 3: multichannel self-checking unit mainly may include following sections:

1: pressure gauge channel interface (channel 1-4), self calibration interface, gas appearance, two-bit triplet air valve, air pump, pressure sensing Device (pressure interface end) can be connected in the way of Fig. 3 with plastics gas conduit or hollow steel pipe.Self calibration interface After being connect with gas appearance and air pump, while being also connected with the gas circuit of the two-bit triplet air valve in corresponding all channels.

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

When needing the pressure sensor to multi-path pressure meter to carry 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 There is the pressure sensor in channel to connect.The air-path interface of channel 1-4 is closed at this time, and function equivalent block diagram is as shown in Figure 4;Fig. 4 For the illustrative view of functional configuration in one specific embodiment of multi-path pressure meter self-checking unit of the present invention when pressure sensor self calibration; Such as Fig. 4, the air pump of micro-control unit and PC computer control multi-path pressure meter is inflated at this time, or using air compressor machine to gas circuit into Row pressure change.The measurement that micro-control unit and PC computer pass through the measured value and pressure sensor of comparison high-grade pressure gauge Value, synchronizes self-alignment purpose to reach, which can disposably complete the pressure of all channel pressure sensors Self calibration.

After the completion of multi-path pressure meter self calibration, the two-bit triplet in each channel is controlled by micro-control unit and PC computer Air valve makes channel 1-4 be connected respectively with the pressure sensor gas circuit in corresponding each channel.And each channel is at this time due to two-bit triplet The effect of air valve, each channel and the gas channels of self calibration interface have disconnected in gas circuit.Therefore multi-path pressure meter difference is each From independence, normal pressure measurement can be carried out, pressure measuring function simplification figure such as Fig. 5 is entered after the completion of pressure sensor self calibration Shown, Fig. 5 is to carry out after the completion of pressure sensor self calibration in one specific embodiment of multi-path pressure meter self-checking unit of the present invention The illustrative view of functional configuration of pressure measurement;

The specific embodiment of multichannel self-checking unit of the present invention synchronizes self-alignment mode, multi-pass using pressure sensor Pressure sensor all pressure channel self calibration numbers in road only need once to can be completed;Using two-bit triplet air valve, will sense Device self calibration gas circuit and the gas circuit of each channel pressure Measurement channel separate;Air pump control either air compressor machine control section is placed Or be mounted in multi-path pressure meter, exclude the control incompatibility problem such as air pump.

Easy to operate, when needing the pressure sensor to multi-path pressure meter to carry out self calibration, all Channel Synchronous are certainly Calibration, it is disposable to complete.The mode for avoiding traditional manual operation switching channel, reduces the influence of human factor;Self-test Number is not influenced by number of channels, the embodiment of the present invention can be applicable to the more multichannel self-calibration system such as 8 channels, 16 channels and Synchronous self calibration can be achieved in device;All channel pressure measurement consistency are more preferable, and self calibration is that all Channel Synchronous are completed, Eliminating environment temperature, humidity, the differentiation of atmospheric pressure influences.Therefore after the completion of all channel self calibrations, the pressure in each channel Power consistency is more preferable;Control compatibility is more preferable, and control is more convenient: air pump or air compressor machine and multi-path pressure meter are combined into one A device eliminates the compatibility issue of external air pump Yu multi-path pressure meter control circuit;Use cost is lower, is both able to satisfy Multi-path pressure meter calibrates the function of more sphygmomanometers simultaneously, and it is disposably complete to be able to achieve all pressure sensor channels self calibration At.

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

In order to solve the problems, such as that Conventional gauges self-test scheme is at high cost, complicated for operation and error is larger, the present invention is also mentioned A kind of multi-path pressure meter self checking method embodiment 1 is supplied, Fig. 6 is multi-path pressure meter self checking method embodiment 1 of the present invention Flow diagram;As shown in fig. 6, may comprise steps of:

Step S610: being 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;Issue the first commutation control signal and pressure control respectively according to output signal by micro-control unit Signal;

Step S620: according to the first commutation control signal, each gas of high-grade pressure gauge connecting multi-channel pressure gauge is blocked to hold The first gas channels, be connected each pressure sensor of high-grade pressure gauge connecting multi-channel pressure gauge the second gas channels;

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

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

In a specific embodiment, can with comprising steps of

According to the second commutation control signal, the second gas channels are blocked, the first gas channels are connected;Wherein, the second commutation Control signal is what micro-control unit was issued when pressure self calibration is completed.

Multi-path pressure meter self checking method embodiment 1 of the present invention, increases self calibration on the basis of multi-path pressure meter The function in channel.In the case where reservation adjustable multiple pressure gauge functions, if desired internal pressure sensor is calibrated When, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure sensor self calibration in all channels Only disposably completed in the connection of external high-grade pressure gauge.Operation of the present invention is simple, and self-test number is not by number of channels Influence, can guarantee the consistency of all channel pressures measurement, control good compatibility and control is more convenient.

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

The technical idea of self checking method based on the above multi-path pressure, while in order to solve Conventional gauges self-test scheme Problem at high cost, complicated for operation and larger error, the present invention also provides a kind of multi-path pressure meter self-checking system embodiments 1;Fig. 7 is the structural schematic diagram of multi-path pressure meter self-checking system embodiment 1 of the present invention;As shown in fig. 7, may include:

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;It is gentle to issue according to output signal the first commutation control signal respectively by micro-control unit Voltage-controlled signal processed;

Pneumatic inverting module 720, for blocking high-grade pressure gauge connecting multi-channel pressure according to the first commutation control signal The first gas channels that each gas of power meter holds, are connected the second gas of each pressure sensor of high-grade pressure gauge connecting multi-channel pressure gauge Paths;

Air pressure control module 730, for carrying out air pressure control to the gas in the second gas channels according to pressure control signal System;By pressure sensor and high-grade pressure gauge respectively according to the pressure change of gas, corresponding survey is exported to micro-control unit Magnitude;And by micro-control unit according to the measured value of high-grade pressure gauge and the measured value of pressure sensor, 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, blocking the The first gas channels are connected in two gas channels;Wherein, the second commutation control signal is that micro-control unit is completed in pressure self calibration When issue.

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

Multi-path pressure meter self-checking system embodiment 1 of the present invention, increases self calibration on the basis of multi-path pressure meter The function in channel.In the case where reservation adjustable multiple pressure gauge functions, if desired internal pressure sensor is calibrated When, can effectively and be rapidly performed by multi-path pressure sensor self calibration.The pressure sensor self calibration in all channels Only disposably completed in the connection of external high-grade pressure gauge.Operation of the present invention is simple, and self-test number is not by number of channels Influence, can guarantee the consistency of all channel pressures measurement, control good compatibility and control is more convenient.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (10)

1. a kind of multi-path pressure meter self-checking unit, which is characterized in that including self calibration module;The self calibration module includes more A air operated reversing valve;Each air operated reversing valve be connected to each channel of multi-path pressure meter gas hold and pressure sensor it Between;The pressure sensor connects the micro-control unit of the multi-path pressure meter;The self calibration module also with the micro-control Unit processed is connected;The micro-control unit is one chip microcomputer or single-chip microcontroller;
The signal that the micro-control unit is exported based on high-grade pressure gauge when being connected to the self calibration module, to it is described from Calibration module issues the first commutation control signal, pressure control signal;
The air operated reversing valve according to the first commutation control signal, block that the air operated reversing valve connects that the gas holds the The second gas channels that the air operated reversing valve connects the pressure sensor are connected in one gas channels;
The self calibration module carries out air pressure control according to the pressure control signal, to the gas in second gas channels System;
The pressure sensor and the high-grade pressure gauge are respectively according to the pressure change of the gas, Xiang Suoshu microcontroller list Member exports corresponding measured value;The micro-control unit is according to the measured value and the pressure sensor of the high-grade pressure gauge Measured value, to the multi-path pressure meter carry out pressure self calibration.
2. multi-path pressure meter self-checking unit according to claim 1, which is characterized in that the self calibration module further includes Sequentially connected self calibration interface, gas container and air compression plant;The gas container is connected with each air operated reversing valve It connects;The air compression plant is connected with the micro-control unit;
The signal that the micro-control unit is exported based on the high-grade pressure gauge when being connected to the self calibration interface issues The first commutation control signal, the pressure control signal;
The air operated reversing valve blocks the gas container to connect the described of each gas appearance according to the first commutation control signal Second gas channels that the gas container connects each pressure sensor are connected in first gas channels;
The air compression plant carries out air pressure control according to the pressure control signal, to the gas in second gas channels System.
3. multi-path pressure meter self-checking unit according to claim 2, which is characterized in that the air compression plant is gas Pump or air compressor.
4. multi-path pressure meter self-checking unit according to claim 1, which is characterized in that
The micro-control unit issues the second commutation control signal to the air operated reversing valve when the pressure self calibration is completed;
The air operated reversing valve blocks second gas channels, conducting described first according to the second commutation control signal Gas channels.
5. multi-path pressure meter self-checking unit according to any one of claims 1 to 4, which is characterized in that described pneumatic Reversal valve is two-bit triplet pneumatic operated valve.
6. a kind of multi-path pressure meter self checking method, which is characterized in that comprising steps of
It is being connected to high-precision pressure timing, is being sent by the high-grade pressure gauge to the micro-control unit of multi-path pressure meter Output signal;By the micro-control unit the first commutation control signal is issued according to the output signal respectively and pressure control is believed Number;
According to the first commutation control signal, the high-grade pressure gauge is blocked to connect what each gas of the multi-path pressure meter held First gas channels, be connected the high-grade pressure gauge connect each pressure sensor of multi-path pressure meter the second gas circuit it is logical Road;
According to the pressure control signal, pressure control is carried out to the gas in second gas channels;
By the pressure sensor and the high-grade pressure gauge respectively according to the pressure change of the gas, Xiang Suoshu microcontroller Unit exports corresponding measured value;And measured value and the pressure by the micro-control unit according to the high-grade pressure gauge The measured value of sensor carries out pressure self calibration to the multi-path pressure meter.
7. multi-path pressure meter self checking method according to claim 6, which is characterized in that further comprise the steps of:
According to the second commutation control signal, second gas channels are blocked, first gas channels are connected;Wherein, described The second commutation control signal micro-control unit is issued when the pressure self calibration is completed.
8. a kind of multi-path pressure meter self-checking system characterized by comprising
Interface module, for being connected to high-precision pressure timing, by the high-grade pressure gauge to multi-path pressure meter Micro-control unit sends output signal;The first commutation control letter is issued according to the output signal respectively by the micro-control unit Number and pressure control signal;
Pneumatic inverting module, for blocking the high-grade pressure gauge connection described more according to the first commutation control signal The first gas channels that each gas of channel pressure meter holds are connected the high-grade pressure gauge and connect each pressure of multi-path pressure meter Second gas channels of sensor;
Air pressure control module, for carrying out air pressure to the gas in second gas channels according to the pressure control signal Control;By the pressure sensor and the high-grade pressure gauge respectively according to the pressure change of the gas, Xiang Suoshu micro-control Unit processed exports corresponding measured value;And measured value and the pressure by the micro-control unit according to the high-grade pressure gauge The measured value of force snesor carries out pressure self calibration to the multi-path pressure meter.
9. multi-path pressure meter self-checking system according to claim 8, it is characterised in that:
The pneumatic inverting module is connected described for blocking second gas channels according to the second commutation control signal One gas channels;Wherein, the second commutation control signal is that the micro-control unit is sent out when the pressure self calibration is completed Out.
10. multi-path pressure meter self-checking system according to claim 8 or claim 9, it is characterised in that:
The pneumatic inverting module, for being connected or blocking first gas channels and institute by control two-bit triplet pneumatic operated valve State the second gas channels.
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CN108303210B (en) * 2017-12-29 2020-04-07 上海电力学院 InAs vacuum gauge and vacuum degree testing method
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