CN111739274B

CN111739274B - Instrument management system, management platform, industrial instrument and method

Info

Publication number: CN111739274B
Application number: CN202010843803.9A
Authority: CN
Inventors: 赵士春
Original assignee: Beijing Const Instruments Technology Inc
Current assignee: Beijing Const Instruments Technology Inc
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-12-08
Anticipated expiration: 2040-08-20
Also published as: CN111739274A

Abstract

The invention relates to the technical field of automatic management of instruments and meters, and designs an instrument management system, a management platform, an industrial instrument and a method through analysis of calibration information.

Description

Instrument management system, management platform, industrial instrument and method

Technical Field

The invention relates to the technical field of large-scale instrument automatic management, in particular to an instrument management system supporting the management of the stability and the accuracy of an industrial instrument, an instrument management platform applied to the instrument management system, the industrial instrument applied to the instrument management system, an instrument accuracy evaluation method and an instrument stability evaluation method based on the instrument management system.

Background

Industrial instruments such as thermometers, pressure gauges, and flow meters are widely used in various fields of industry and other industries as important information collection equipment for industrial systems.

In practical work, when the instrument is used as a reading device for environmental parameters or performance parameters in production and manufacturing, the accuracy of the instrument needs to be considered first, for example, whether the instrument can reach the required measurement accuracy, whether the instrument can maintain the due accuracy after being used for a period of time, and the like; in some industrial automation management systems, when a meter shows that a reading is abnormal, the first operation to be performed is not to collect emergency measures for the abnormal situation, but to judge the credibility of the abnormal reading, that is, to evaluate the accuracy and stability of the reading of the meter, the former determines the possible deviation range of the reading of the meter, and the latter determines whether the possible deviation range is maintained or expanded.

Whether the reading accuracy of the meter is guaranteed or the reading stability is guaranteed, it is currently recognized that the most effective, reliable and easy-to-implement method is to perform verification/calibration periodically, which is written in standards and even regulations of many countries, and the assessment of the reading accuracy and stability of the meter according to verification/calibration results is also the most important measure at present.

In the traditional work, the scheme designed for the requirement is to perform verification/calibration regularly (specifically, verification or calibration should comply with corresponding laws and regulations, for convenience of description, some international common methods are also considered, and in the following description, calibration is uniformly described), and generate a paper calibration certificate, wherein the calibration certificate has fixed format and content requirements, and a calibration organization and a calibration personnel signature party are required to be enabled; since each meter may have a long service life, there are multiple calibration certificates, and therefore, one of the jobs of the meter users is to archive and manage these calibration certificates and review them when necessary.

The traditional working mode is unscientific and inefficient for more and more instrument management amount, especially for large and medium users, the number of the instruments under management is thousands or even more, and corresponding paper calibration certificates are tens of thousands or even tens of thousands, so that the reference frequency of the calibration certificates is very high, and relatively, the repeated work of looking up several files from tens of thousands of paper files causes very large loss of manpower and material resources.

In view of the above situation, some research and development institutions or enterprises and public institutions have designed some optimization measures, and the common points of the optimization measures are as follows: the method is characterized in that a paper calibration certificate is electronized, the electronized calibration certificate can be stored in an instrument body, can also be stored in a certain remote storage device, and can realize the association between the instrument bodies in a mode similar to a two-dimensional code mark, and a calibration certificate storage element is separately designed in the scheme and is physically bound with the instrument body.

The above-mentioned mode has all solved the inconvenient difficult problem of traditional paper instrument certificate to a certain extent and has consulted, but the so-called paper calibration certificate electronization still has great problem.

As mentioned above, whether a paper calibration certificate, or an electronic calibration certificate, depends heavily on the existing calibration certificate format, and the official seal/signature, not the calibration data itself; whether a chapter exists or not is judged first, and then data is judged, so that the existing ten-million-level meter using scale in China is unscientific and wastes resources.

Disclosure of Invention

The calibration field is developed for years and is nearly perfect in a laboratory view, but the perfection is imperfect for industrial manufacturing, and the balance point is difficult to grasp and is a key point of the lack of corresponding technical means in the prior art because the industrial manufacturing needs to consider not only the perfection but also the economical efficiency, particularly, the consistency needs to be considered in large-scale automatic management along with the technical progress and the enlargement of industrial scale.

Therefore, there is a need for a technical means of calibrating information rather than a certificate, which means requires that the calibration information be as refined and useful as possible, that the calibration information be easy to read and use, that the importance of the data be emphasized rather than the presence or absence of official seal signatures, that the trustworthiness of the data be assessed as needed, and that automation be achieved as free of human handling as possible.

In view of the above situation, the inventor provides an instrument management system suitable for managing the stability and accuracy of large-scale instruments through a large number of tests and data analysis.

An instrument management system includes

A calibration information template comprising a generic term and a data item, the generic term comprising one or more of a calibration mechanism, a calibrator personnel, an environmental condition, a magnitude transfer specification, the data item comprising a result data item of a calibration item;

the managed instrument comprises a storage module and a communication module, wherein the storage module stores an instrument calibration information template and periodically stores calibration information data according to the instrument calibration information template, and the communication module supports the uploading of the calibration information data;

the management platform is preset with a platform calibration information template and corresponds to the managed instrument, and reads data item data in calibration information data of the managed instrument according to the platform calibration information template so as to evaluate the stability and/or accuracy of the managed instrument.

The subdivision meanings of the calibration information template are various, different subdivision meanings are different but unified, and for convenience of description, different meanings are defined in the invention in a distinguishing manner:

for the general items and data items stored at the meter end, the items are specifically determined, not conceptual, and defined as a meter calibration information template;

for the general items and data items stored on the platform side, the general items and data items are specifically determined, not conceptual, and are defined as platform calibration information templates;

the concept of not being certain to exist at a certain location, but rather describing the calibration information template, is described using the calibration information template.

The calibration mechanism and the calibration personnel correspond to a generation source mechanism and an executor of calibration information data.

The calibrator corresponds to a standard tool used as a reference when calibration information data is generated.

The environmental conditions correspond to environmental conditions upon which the calibration information data is generated.

The magnitude transfer specification is generated in accordance with a standard/protocol/specification corresponding to the calibration information data, which standard/protocol/specification generally prescribes a transfer rule for accuracy from the calibrator to the meter to be calibrated.

Thus, the calibrator and magnitude delivery specifications dictate the significance/accuracy of the calibration information data, the environmental conditions characterize the technical trustworthiness of the calibration information data, and the calibration authority and the calibrator characterize the commercial trustworthiness of the calibration information data as a whole.

The data item is related to the type of the managed instrument and is an item representing the calibration result in the actual calibration process, generally, the data item includes a value and an error, for most instruments, the reference value of the standard is not uniquely locked, the value includes a standard value and a detected value, the standard value represents the reading of the standard in the calibration process, the detected value represents the reading of the table, namely the present table in the calibration process, and the error, also called an error value, represents the deviation degree between the detected table and the standard, generally the difference between the standard value and the detected value.

The managed instrument is controlled to work, the controlled instrument can be completely used as a control center by a management platform, namely the managed instrument has no control module, the working instruction of the managed instrument is sent by the management platform and directly reaches each component in the managed instrument, and the managed instrument can also be managed in a layered mode, namely the managed instrument is provided with a control module and bears the control work of an instrument end; when the number of meters is small, both controlled manners are possible, and when the number of meters is very large and the distribution area is very wide, since the control command also needs to occupy a certain data channel, the control manner completely using the management platform as the control center becomes uneconomical, therefore, preferably, the managed meter has a control module which controls the operation of the managed meter.

Each managed instrument only has one instrument calibration information template at the same time; sources of the instrument calibration information template include, but are not limited to: the write is downloaded/written to by the management platform or other external source during the manufacturing stage.

The calibration information data can be written in through a man-machine interaction interface of the managed instrument, or can be imported or written in from an external information source through a communication module.

The external information source is preferably a management platform, and since the calibration information data and the managed instrument are separated at this time, in order to ensure the authenticity and the reliability of the data, the management platform needs to design an evaluation mechanism to evaluate the calibration information data to be written.

The storage module of the managed instrument is preferably a nonvolatile random access memory device and is used for storing an instrument calibration information template and calibration information data.

The periodic storage of the calibration information data by the managed instrument refers to a stored result rather than a storage behavior, that is, the result of the periodic storage technical means is that when the calibration information data needs to be extracted, the occurrence time of the calibration information data is periodically distributed, and at least one set of calibration information data corresponds to each calibration period, and the period is preferably a calibration period, for example, 6 months or 1 year, and is usually specified by a specification/regulation or set by a user according to a requirement; as the meter ages, the calibration period may be adjusted, and thus, for the same managed meter, one or more calibration periods may be included over different periods of the service life.

The calibration information data containing the common data and the complete data are defined as a group of calibration information data, the group of calibration information data can be stored periodically according to a calibration period, or a plurality of groups of calibration information data can be stored once after a long time, and the storage behavior and the calibration period can be separated.

The platform calibration information template sources include, but are not limited to: the data is uploaded by a managed instrument, is generated by a management platform and is input into the management platform by a user.

Based on different sources of the platform calibration information template and the instrument calibration information template, the means for realizing the corresponding relationship between the platform calibration information template and the instrument calibration information template comprises the following steps:

the instrument calibration information template is written in the manufacturing stage, and the platform calibration information template is obtained by uploading the managed instrument;

the platform calibration information template is input by a user or automatically generated by the platform, and the instrument calibration information template is downloaded/written by the management platform;

the platform calibration information template is input by a user or automatically generated by the platform and delivered to the instrument manufacturer, who writes the instrument calibration information template in accordance with the platform calibration information template requirements at the instrument manufacturing stage.

Therefore, the instrument calibration information template may correspond to the platform calibration information template one-to-one, or a plurality of instrument calibration information templates may correspond to one platform calibration information template, but there is no case where one instrument calibration information template corresponds to a plurality of platform calibration information templates within the same time.

Preferably, the platform calibration information template includes a plurality of platform calibration information templates, each platform calibration information template includes a plurality of platform calibration information templates, and each platform calibration information template includes a plurality of platform calibration information templates.

In the present invention, it is preferable that the general items of each type of calibration information template are composed of five items of calibration mechanism, calibrator, environmental conditions, and magnitude transfer specifications.

After the management platform reads the calibration information data, the analysis of the calibration information data is hierarchical:

when the calibration information data only comprises one calibration period, analyzing the data item data by using a limit value method, namely endowing a limit value to the data item, comparing the data item data with the limit value, and judging the instrument accuracy according to the comparison result;

when the calibration information data comprises a plurality of calibration periods, on the basis of a limit value method, the accuracy and the stability of the instrument can be judged by analyzing and simulating the variation trend of the data item data;

when the user has doubts about the accuracy of the calibration information data/has higher trust requirement, the corresponding general data can be called for analysis and the accuracy and the trust of the calibration information data can be judged.

Under the general condition, including daily instrument inspection and instrument anomaly analysis generally, can solve through foretell data item data analysis, such pure data analysis can promote processing speed greatly, need not expert's judgement or even need not manual operation, can give the aassessment suggestion to precision and stability fast by instrument management platform self.

In a few cases, for example, an indication is suspected to have an abnormal expected characterization which is not found and very weak in the previous writing, and whether the abnormal expected characterization exists or not needs to be checked through more accurate judgment, the corresponding general item information can be called again, so that the evaluation result of the base layer is supplemented.

In some cases, the managed instrument has a wide distribution area, so a communication network is adopted as a data channel between the managed instrument and the management platform, that is, the managed instrument and the management platform both have the networking qualification of the communication network, the managed instrument firstly transmits data to the communication network and points to the address of the management platform when uploading data, and the management platform receives data from the communication network; more specifically, the communication module of the managed instrument is a narrow-band internet of things (NB-loT) communication module based on a 5G technology, the communication network is a civil/commercial internet, the management platform is arranged in the cloud, and if the managed instrument is particularly distributed in remote places (for example, more than 10km away from a nearest base station), data intercommunication can be realized by additionally arranging a relay station and the like.

The invention also designs an instrument management platform which can be applied to the instrument management system and used as the management platform to manage and comprises a template unit, an identification unit, a data interaction unit and a processing unit;

the template unit stores platform calibration information templates corresponding to managed instruments, the calibration information templates comprise general items and data items, the general items comprise one or more items of a calibration mechanism, a calibrator, calibration personnel, environmental conditions and magnitude transfer specifications, and the data items comprise result data items of calibration items;

the identification unit is used for identifying the managed instrument;

the data interaction unit is used for downloading and reading data between the instrument management platform and the managed instrument;

the processing unit is configured to control the identification unit to work according to instructions so as to realize identification of the managed instrument, control the data interaction unit to obtain calibration information data from the managed instrument, call a corresponding platform calibration information template and read data item data in the calibration information data according to the calibration information data, and evaluate the accuracy/stability of the managed instrument according to the data item data.

The template unit is a data storage unit which is specially used for storing one or more platform calibration information templates, and the platform calibration information templates correspond to the managed instruments managed by the instrument management platform.

One identification mode of the identification unit is as follows: whether the data is sent or received, the address of the source/destination is taken as the basis, namely, the identification unit judges the data source by identifying the source address; in some cases where an enterprise lan is used as a carrier for the meter management platform and the meter management system, since the virtual address in the lan is given and determined, the managed meter has determined address information upon accessing the meter management system, in which case the identification unit may not be needed, and its function of identifying the source of the data is performed by the data interaction unit based on the identification of the address.

The other identification mode of the identification unit is as follows: when the managed instrument is accessed to the instrument management platform for management, an independent identification code is distributed to the managed instrument, the identification code is transmitted and stored in the managed instrument terminal, the managed instrument is attached with the identification code when uploading data, and the identification unit judges the data source according to the identification code; correspondingly and preferably, when the instrument management platform issues the instruction, the instrument management platform is also accompanied with the identification code, the directional data of the instruction not only comprises the object address of the instruction, but also comprises the identification code, the managed instrument can check the identification code accompanied with the instruction when receiving the instruction, if the identification code is consistent with the identification code stored by the managed instrument, the instruction can be confirmed and executed, if the identification code is inconsistent with the identification code stored by the managed instrument, the instruction is considered to have a problem and is not executed temporarily, and the instruction is fed back to the instrument management platform to wait for subsequent processing.

In some application scenarios with frequent checking periods, there is no need to invoke urgent calibration information data, and the meter end may also set a fixed data uploading period, on this basis, the data interaction unit may be replaced by a data reading unit, and the data reading unit only performs the function of the meter management platform to read the calibration information template and the calibration information data from the managed meter.

The instrument management platform has a function of writing calibration information data into a managed instrument, and therefore the instrument management platform comprises a storage unit with a temporary storage function; in the case of the calibration information data storage according to the aspect of the present invention, since the calibration information data is stored in the managed instrument, the instrument management platform does not generally store a large amount of calibration information data for a long period of time, and therefore, it is not necessary to provide a storage means for the calibration information data in the instrument management platform.

The operation of the processing unit comprises starting according to an external instruction and starting according to a pre-configuration instruction; the starting up according to the external instruction is generally sent by a user, generally aiming at a specific managed instrument or a plurality of managed instruments, the sending reason comprises the reading abnormity of the corresponding managed instrument, the work specific work requirement of the user and the like, after the instruction reaches the processing unit, the processing unit sends an instruction for reading calibration information data (or a specific part in the calibration information data) to the managed instrument through the data interaction unit, the managed instrument extracts and uploads the calibration information data according to the instruction of the instrument management platform, the data interaction unit receives the calibration information data, the processing unit calls a corresponding platform calibration information template from the template unit according to the managed instrument, and reading calibration information data according to the platform calibration information template, and processing the read calibration information data by the processing unit to obtain a precision/reliability evaluation result of the managed instrument.

The invention also designs an industrial instrument which can be applied to the instrument management system for management and comprises a sensor module, a battery module, a processing module, a storage module, a communication module and an instrument shell.

The main body of the sensor module is arranged in the instrument shell, the sensor module is provided with a detection probe, the detection probe extends out of the instrument shell and is arranged at a preset detection position, the preset detection position is related to the type of the instrument and an application scene, for example, the instrument is a pressure gauge, the measurement object is the pressure of an air delivery pipe, the detection probe is arranged in a pressure detection point of the air delivery pipe, for example, the instrument is a thermometer, the measurement object is indoor temperature, and the detection probe can be arranged at any position suitable for representing the room temperature; the sensor module is provided with an analog-to-digital conversion circuit, converts acquired analog signals into digital signals and sends the digital signals to the processing module, for convenience of description, measurement data acquired and converted by the sensor module is defined as main variable data, and acquisition of the main variable data is also one of the main functions of the industrial instrument.

The battery module is arranged in the instrument shell and used for supplying power to each module and element which need to use power, and the module which needs to use power comprises a sensor module, a processing module, a storage module and a communication module.

The storage module comprises a template area and a data area, wherein the template area stores an instrument calibration information template, the instrument calibration information template comprises general items and data items, the general items comprise one or more items of a calibration mechanism, a calibrator, calibrator personnel, environmental conditions and magnitude transfer specifications, and the data items comprise result data of calibration items; the data area is used for storing calibration information data and storing primary variable data or other data when needed.

The communication module is used for uploading and downloading industrial instruments and external data.

The processing module is configured to control the modules to complete acquisition of primary variable data, acquisition and storage of calibration information data, and uploading of data.

The specific workflow is illustrated as follows:

the processing module generates a second instruction according to the first instruction, the first instruction may be an external instruction from a management system or an operator, or may be an instruction preconfigured by the processing module, for example, the processing module may preset to periodically perform primary variable data acquisition, the second instruction reaches the sensor module, the sensor module performs primary variable data acquisition according to the second instruction and generates measurement data, the sensor module transmits the measurement data to the processing module, and the processing module immediately uploads/stores the data to the storage module according to the requirement of the first instruction.

The industrial instrument further comprises a human-computer interaction interface, the processing module is preconfigured with a calibration information data input mode, a user can log in the mode under the human-computer interaction interface and manually input calibration time and data item data according to the instrument calibration information module, the processing module receives the data item data and assigns a common item in the instrument calibration information template to be null to generate complete calibration information data, and the processing module stores the complete calibration information data into a data area of the storage module.

The industrial instrument can obtain external calibration information data to be imported through the communication module, the processing module is preconfigured with a calibration information data import mode, in the mode, the processing module can verify the calibration information data to be written through a preset rule, the processing module allows writing, does not pass verification and refuses writing, the processing module generates complete calibration information data by assigning a general item which has no numerical value but exists in the instrument calibration information module to be empty after verification, and the processing module stores the complete calibration information data into a data area of the storage module; generally, when external calibration information data is imported, the external calibration information data is accompanied with write authority verification information, the processing module verifies the write authority verification information, and if the external calibration information data passes the verification, the calibration information data is allowed to be written, but the write authority verification information is not in the range.

The industrial instrument can simultaneously have one or two of the first acquisition mode and the second acquisition mode of the calibration information data.

Using calibration information data, wherein the industrial instrument receives an external third instruction, the third instruction requires the industrial instrument to upload the calibration information data, and the third instruction should declare the type and the corresponding time of the calibration information data to be uploaded, and the default condition is all data item data of all time periods; taking a default case as an example, the processing module extracts a meter calibration information template from the template area of the storage module according to the third instruction, and extracts all data item data of all time periods from the data area of the storage module according to data items in the meter calibration information template; after data extraction is completed, attaching an identification code to the extracted data item data under the condition of condition support, compressing the data item data and the identification code to generate data to be sent, transmitting the data to be sent to a communication module, modulating the data to be sent by the communication module to generate a data packet to be sent, and sending the data packet to be sent to an instrument management platform or a communication network.

On the basis of the schemes of the instrument management system, the instrument management platform and the industrial instrument, in order to further highlight the convenience of the invention in the aspects of data use and management, the invention also designs an instrument precision evaluation method, which can realize automatic analysis of instrument precision and at least relates to a managed instrument and a management platform

Step 1.1, a platform calibration information template is preset in the management platform, the platform calibration information template comprises a general item and a data item, the general item comprises one or more items of a calibration mechanism, a calibrator, environmental conditions and a magnitude transfer specification, and the data item comprises result data of a calibration item;

step 1.2, the managed instrument is preset with an instrument calibration information template, the instrument calibration information template corresponds to the platform calibration information template, the corresponding mode can be that the two are completely consistent, or the data items of the two are consistent, and the platform calibration information template contains all the general items of the instrument calibration information template;

step 1.3, the managed instrument periodically stores calibration information data according to the instrument calibration information template; preferably, the periodic storage corresponds to at least one piece of calibration information data in each calibration period of the managed instrument;

and 2, the management platform reads the calibration information data from the managed instrument according to the instruction, and evaluates the measurement accuracy of the managed instrument according to the calibration information data.

The step 1.1, the step 1.2 and the step 1.3 are all preparation stages of the instrument accuracy evaluation method, there is no sequence among the three steps, and the arrangement according to 1.1 to 1.3 is only for convenience in expression, but generally, the configuration of the instrument calibration information template should be no later than the step 1.3, and the configuration of the platform calibration information template and the realization of the consistency between the platform calibration information template and the instrument calibration information template may be implemented after the step 1.2 or the step 1.3, or before the same, or simultaneously, in short, the step 1.1 to the step 1.3 are all completed before the step 2 is executed.

The step 2 is a main implementation stage of the meter accuracy evaluation method, and actually includes three parts:

firstly, the management platform obtains an instruction which is used for explaining a managed instrument and an evaluation stage/purpose;

secondly, the management platform reads corresponding calibration information data from the managed instrument according to the instruction content; it should be noted that, in general, the general item data is not read before or at the same time as the data item data is read;

and thirdly, processing the read calibration information data, and evaluating the accuracy of the managed instrument according to a processing result.

The method comprises the following steps of directly consulting an error display, wherein the smaller the error display is, the higher the accuracy of a managed instrument is, the larger the error display is, the lower the accuracy of the managed instrument is, further evaluating the error display, setting an ideal value and a tolerance value for the error display, indicating that the accuracy of the managed instrument is very high when the error display is less than or equal to the ideal value, indicating that the accuracy of the managed instrument is general but can meet requirements when the error display is between the ideal value and the tolerance value, and indicating that the accuracy of the managed instrument cannot meet the requirements when the error display is higher than the tolerance value; in addition, the specific weight of the calibration information data in different periods may be different according to the specific evaluation purpose, and generally, the calibration information data with a large correlation degree with the time period to be evaluated has a high use value, whereas the calibration information data with a longer time interval with the evaluation time period has a low use value and can only be used as reference data.

In the actual calibration process, when a part of the instruments have large deviation, the part of the instruments can be corrected by means of calibration parameter modification and the like, the operation of directly adjusting the instruments to restore the reading to be accurate again is calibration, the calibration process is usually carried out along with the calibration, after the calibration operation is finished, the calibrated data is used as formal calibration data, and the data before the calibration may or may not be recorded.

Calibration is actually a correction for the stability of the instrument, and if the data and performance are analyzed directly without considering calibration factors in the analysis, misjudgment on the stability of the instrument may be caused, which is generally embodied as an over-estimation on the stability of the instrument.

Therefore, in view of the above situation, a method for evaluating the measurement stability of a meter based on the above meter management system is designed to eliminate the influence of calibration data as much as possible and realize accurate judgment of the measurement stability of the meter, and at least one managed meter and a management platform are involved

step 1.3, the managed instrument periodically stores calibration information data according to the instrument calibration information template; preferably, the periodic storage corresponds to at least one calibration information data in each calibration period of the managed instrument, and at least two calibration information data with different occurrence times are stored in the managed instrument;

and 2, the management platform reads the calibration information data from the managed instrument according to the instruction, and evaluates the measurement stability of the managed instrument according to the calibration information data.

The same as the method for evaluating the measurement accuracy of the instrument, the step 1.1, the step 1.2 and the step 1.3 have no sequential limitation, and the step 2 occurs after the step 1.1, the step 1.2 and the step 1.3.

The specific implementation of step 2 includes extracting data item data of all calibration information data from the managed instrument, wherein at least two groups of occurrence time of the data item data have a sequence, arranging the data item data according to the sequence of the occurrence time, and performing the following judgment processing:

if the data after adjustment exists, if the data does not exist, namely the adjustment does not occur, directly comparing the data of each group of data items;

if the data after adjustment and teaching exist, namely adjustment and correction occur, the time corresponding to the data forms a stability analysis breakpoint, whether the data before adjustment and correction exist is searched, if so, the data before adjustment and the data before the stability analysis breakpoint can be compared together, the data after adjustment and the data after the stability analysis breakpoint can be compared together, and the total comparison result can be determined by the synthesis of the comparison results of the previous data and the next data; if there is no pre-training data, the stability analysis breakpoint cannot be compared with the previous data, and only the post-calibration data and the post-stability analysis breakpoint can be used for comparison.

Based on the above mentioned situation that the instrument management system and the industrial instrument may have that calibration information data is directly written into the industrial instrument, as mentioned above, the authority for writing data needs to be reasonably judged and considered to ensure the credibility of the data, after specific analysis, it is considered that, regarding data item data, the invention 'pay more attention to the data itself' is the starting point, on the basis of having basic credibility, the evaluation of credibility is not participated, regarding general data, since the data itself is the basic data for credibility evaluation, therefore, it is necessary to perform management and control through a certain authority design, based on this, an instrument calibration factor information management method is designed, which uses the instrument management platform as the management responsibility for instrument calibration factor information, specifically comprising:

the meter management platform is provided with a calibration element database, a user of the meter management platform has a sub-database of the calibration element database, calibration element information is stored in the calibration element database, the calibration element information comprises a verified calibration mechanism, a calibrator, calibration personnel, environmental conditions and magnitude transmission specifications, and the sub-database of the corresponding calibration element database stores verified calibration element information corresponding to the user.

The calibration information data to be written into the managed instrument is generated at the instrument management platform end, a user fills in data item data in the calibration information data, when the user faces general item data, whether the user has the writing authority of the information needs to be verified, the general item data to be written and a sub-database of a user calibration element database are compared, if the data stored in the sub-database of the user calibration element database are consistent, the general item data to be written are allowed to be written, and if the data are not consistent, the writing is refused.

Has the advantages that:

through the implementation of the invention, the pain point existing in the existing market product can be solved, and compared with the prior art, the invention has the following technical advantages and beneficial effects:

1. the design of the invention makes the calibration information get rid of the form constraint of the traditional calibration certificate, makes the calibration information become the real calibration information for evaluating the accuracy of the instrument instead of the information of the calibration certificate, and realizes the crossing of the concerned form/concerned signature to the concerned data/concerned content.

2. The design of the invention enables the calibration information to really realize datamation and machine readability through a uniform calibration information format, so that the management system can quickly and automatically realize the analysis of the calibration information without a particularly complex manual simulation algorithm, and the maximum limit of manual analysis (expert analysis) on the management of a large number of industrial instruments is eliminated, thereby enabling the uniform precision management of large-scale and large-order industrial instruments to be possible.

3. The invention designs the data interaction rule which gives consideration to the matching problem of the management platform and the instrument, and the compatibility of the instrument and the management platform can be realized according to the rule, thereby reducing the possibility of generating a system BUG due to the compatibility problem, and being convenient for an instrument manufacturer to carry out necessary design and adjustment in the design stage, thereby reducing the design and manufacturing cost of each party.

4. The invention also realizes the further effective utilization of the calibration information data through the precision evaluation method/stability evaluation method, and through completely digitizing the calibration information, the method can realize the quick and real-time judgment of the calibration information and provide algorithm support for the unified precision management of large-scale and large-order industrial instruments.

Drawings

Fig. 1 is a schematic diagram of an instrument management system according to the present invention.

Fig. 2 is a schematic view of a periodic management process of the instrument management system according to the present invention.

Fig. 3 is a schematic view illustrating a flow of abnormal meter reading analysis of the meter management system according to the present invention.

Fig. 4 is a schematic diagram of a calibration element entry and calibration information data writing process of the instrument management platform according to the present invention.

Fig. 5 is a schematic diagram of an instrument management system and an instrument management platform according to the present invention.

FIG. 6 is a schematic diagram of the internal data connection of an industrial meter according to the present invention.

FIG. 7 is a schematic diagram of the internal data connection of a thermometer and hygrometer according to the present invention.

Fig. 8 is a template of meter calibration information for a temperature and humidity meter according to the present invention.

Fig. 9 is an example of calibration information data for a temperature and humidity meter according to the present invention.

FIG. 10 is a flow chart illustrating a calibration information data writing mode of an industrial meter according to the present invention.

Fig. 11 is a schematic view illustrating a process of evaluating accuracy and stability of meter measurement of the meter management system and the meter management platform according to the present invention.

Detailed Description

In order to better explain and illustrate the technical solution of the present invention, the following description will be given by way of specific examples.

Detailed description of the preferred embodiment

A petrochemical enterprise A manages a plurality of oil and gas wells distributed in a hundred kilometers range, each oil and gas well needs a plurality of various instruments for monitoring and measuring, and therefore the daily management needs of the enterprise A are about thousands of instruments.

For these instruments, enterprise a strictly complies with the relevant national laws and regulations to perform regular calibration, generates paper calibration certificates, and electronizes these paper calibration certificates, the paper certificates are stored in the company archive, and the electronic certificates are uploaded to the company internal office system, so as to retrieve the electronic certificates at any time when the customers need (for example, bid or ask) or during the engineering construction process.

Currently, enterprise a wants to perform enhanced management on these meters, but has a great difficulty:

firstly, originally, an enterprise A can regularly calibrate an instrument, check whether a previous calibration certificate is prepared and analyze the accuracy and stability of the instrument, wherein the work is performed by manual operation, the accuracy and stability analysis is also completed by experts/special engineers, and the enterprise hopes to reduce the time to monthly/quarterly, so that the workload of an analyst is greatly increased compared with the original half-year/year analysis frequency, and the analysis can not be basically realized under the condition of not increasing human hands;

second, originally, when the reading of the instrument is abnormal, the analysis speed of the enterprise a for the accuracy/stability of the instrument is required to be within 10 minutes, and the result is expected to be completed within 3 minutes or even 1 minute, because the management quantity of the instruments is large, the probability that the reading of the instrument is abnormal simultaneously is also large, and once multiple abnormalities occur on the basis of the existing system, the objective that the enterprise expects to complete the analysis in 1 minute cannot be achieved;

thirdly, in the future, with the expansion of enterprise a services, the management range and the management number of the meters are increased in multiple levels, and under the condition that the whole meter management is gradually systematized and automated, the part of the meter calibration information analysis which still depends on manual operation becomes a short board which obviously restricts the system construction and expansion.

A solution is devised.

The solution includes an improvement on the original instrument management system architecture of enterprise a, and the improved instrument management i system architecture is shown in fig. 1.

Instrument management system include instrument management platform, by management instrument, enterprise LAN and a plurality of human-computer interaction interface, instrument management platform hypothesis in enterprise A's computer lab, by management instrument distribute at each check point and be connected through wired/wireless mode and enterprise A's enterprise LAN, human-computer interaction interface is including establishing the direct connection interaction point at the computer lab to and distribute other interaction points in enterprise A office area through enterprise LAN.

The calibration information template is designed as a rule for instrument management, and specifically comprises general items and data items, wherein the general items comprise one or more items of a calibration mechanism, a calibrator, calibration personnel, environmental conditions and magnitude transmission specifications, and the data items comprise result data items of calibration items.

For enterprise a, the instrument management system includes 8 managed instruments, so that there are 8 platform calibration information templates, general items of each platform calibration information template are consistent, and each platform calibration information template is composed of a calibrator, and a magnitude transmission specification, and data items are different and respectively correspond to the 8 types of instruments incorporated into system management.

The implementation is carried out step by step, so that all the meters locally store meter calibration information templates and calibration information data at the meter end, and the improvement mode is as follows:

for an instrument used for a period of time in enterprise A, if the instrument has hardware support such as a storage module, an instrument calibration information template is written in through a software adjusting mode, and the instrument calibration information template is matched with the instrument and corresponds to a platform calibration information template stored at a management platform end; extracting corresponding information from the existing calibration certificate information of the instrument according to the instrument calibration information template to form calibration information data, and writing the calibration information data into the instrument for storage;

for an instrument used for a period of time in an enterprise A, if the instrument does not have hardware support such as a storage module and the like, an external storage module is additionally arranged, the additionally arranged storage module and the instrument are fixed on a physical layer, and after the hardware support is completed, an instrument calibration information template is written in through a software adjusting mode, wherein the instrument calibration information template is matched with the instrument and corresponds to a platform calibration information template stored at a management platform end; extracting corresponding information from the existing calibration certificate information of the instrument according to the instrument calibration information template to form calibration information data, and writing the calibration information data into the instrument for storage;

the method comprises the steps that an enterprise A prepares a newly purchased instrument, the instrument calibration information template is required to be followed according to the calibration information template rule, the instrument calibration information template is written in before the instrument leaves a factory according to the instrument type, data writing is carried out according to the instrument calibration information template, the newly purchased instrument uploads the stored instrument calibration information template when being accessed into a system for management, and the management platform receives the instrument calibration information template and forms a platform calibration information template after being bound with the corresponding instrument.

After accomplishing above-mentioned improvement, when carrying out the periodic calibration to the instrument, can accomplish in the calibration, in time write into the instrument with the calibration information data, it is concrete, include again:

the instrument has a calibration mode, the instrument is set to the calibration mode during calibration, in the mode, the instrument can automatically generate calibration information data according to the reading and calibration time and an instrument calibration information template, and an operator manually inputs the reading of the standard device to finish writing in the calibration information data;

the instrument has no calibration mode or does not start the calibration mode, and after the calibration is completed, calibration information data is formed in an operating tool (such as a computer) and is directly written into the instrument through a writing tool.

After the improvement and adjustment are completed, the instrument management system has the bottom layer support for automatically managing the instrument.

When the periodic management of the whole meter is needed, the operation is as shown in fig. 2:

step one, setting a management period, such as one month;

step two, when the meters need to be managed at periodic points, the management platform calls data item data in the calibration information from each meter, firstly, whether the calibration information data of the meters are complete in each calibration period is verified according to the access time of the meters, if no calibration information data exists in a certain calibration period, a prompt is sent to the meter, the management platform/an operator searches corresponding data item data and registers the data item data to the corresponding meter, and then the content of the step is repeated until at least one group of calibration information data in each meter is realized in each calibration period;

setting limit values, wherein at least one group of limit values represents the normal level of the accuracy of the instrument; preferably, two or more sets of limits may be set, where different sets of limits represent measures of different degrees of the meter, for example, in two cases, one set of limits represents a higher level of accuracy of the meter, and one set of limits represents a normal level of accuracy of the meter, and this step may be performed simultaneously with the first step;

comparing the data item data in the calibration information of each instrument by using the set limit value, outputting a comparison result, and performing subsequent operations by a user according to the comparison result, wherein the operations include but are not limited to: confirming that the instrument is in a normal usable state, and adjusting/repairing/replacing the instrument which does not meet the requirement.

Obviously, in the above operation, a user only needs to set a management period and a limit value, wherein the management period is from the self demand of a client, and the limit value can refer to the requirement of an instrument application scene, so that the whole process of analyzing and comparing large-scale data does not need manual operation, the evaluation speed is greatly improved, and the management cost is reduced.

In the event of an abnormal meter reading, the operation is as shown in fig. 3:

step one, determining that the reading of an instrument is abnormal;

step two, data item data in the calibration information is taken from the instrument with abnormal reading;

setting limit values, analyzing the accuracy of the instrument, and referring to the third step in the periodic management, focusing on data item data of a similar calibration period, and comprehensively judging the relationship between the abnormal reading condition and the data item data according to the change trend condition of the data item data;

for example, if the reading of the meter is abnormal and is represented as the reading of the meter exceeding the upper threshold of the normal condition, that is, the reading of the meter is higher, the difference between the reading of the meter and the upper threshold is set as the limit, and the data item data in the latest 2 calibration periods is selected;

if at least one group of data appears in the data, the reading number of the detected instrument is greater than the reading number of the standard instrument and the error reading number is greater than the limit value, the reason of the abnormal reading is judged to be related to the instrument;

in the data item data, each group of data is represented as that if the reading number of the detected instrument is less than or equal to that of the standard instrument, the abnormal reading is judged to be irrelevant to the instrument;

if the data of the data item does not meet the two situations, the relationship between the abnormal reading reason and the instrument cannot be judged, and further judgment is carried out through other subsequent steps;

step four, calculating the variation trend of the data item data in the calibration information, for example, aiming at the error index, obtaining an error index variation trend function by using a least square method, wherein the variation trend function is a primary function or a secondary function, and then calculating whether the abnormal value is in the variation range of the variation trend function by using the variation trend function;

step five, if the relation between the abnormal value and the change trend function can be definitely judged, for example, the abnormal value is between the change trend function and the normal value, the reading abnormal reason can be determined to be related to the instrument, if the abnormal value is obviously inconsistent with the change trend function, for example, the abnormal value deviates from the change trend function range or is inconsistent with the deviation direction of the change trend function, the reading abnormal reason can be determined to be unrelated to the instrument, if the abnormal value is in the critical area of the change trend function, for example, the abnormal value is the same as or very close to the change trend function value, the general item data in the calibration information is further taken;

and step six, general item data in the calibration information is called, an expert diagnosis mode can be introduced, the general item data is manually evaluated for the reliability and the accuracy of the data item data, and a conclusion is given.

After the abnormal meter reading is quickly confirmed to be related to the meter, the problem can be solved in an accurate mode, if the abnormal meter reading is related to the meter, the meter should be replaced/adjusted/maintained as soon as possible, if the abnormal meter reading is unrelated to the meter, namely the abnormal meter reading displayed by the meter is credible, specific treatment measures such as alarming, emergency shutdown, necessary fire-fighting measure collection, personnel maintenance and the like should be arranged according to the type of the abnormality.

Through the operation, the rapid evaluation of the abnormal reading of the meter can be realized, although the manual evaluation is introduced in the step six, the automatic evaluation of most abnormal conditions is actually completed in the analysis of the step five, the manual factor does not become a constraint factor of the state analysis of the limit value meter any more, the evaluation efficiency can be ensured, and the management cost is not increased.

Detailed description of the invention

A building enterprise B, which has tens of meters to manage on a business level basis, needs to be calibrated periodically as well as to be analyzed for maintenance periodically and to retrieve data as necessary, similar to those of the specific embodiment.

For the enterprise B, if a set of special instrument management systems is established to manage the instruments, although reliability can be guaranteed, a special person needs to be arranged to maintain the systems, which is very uneconomical, and if no set of systems is used for management, the instrument management is out of control, which is not reliable.

Therefore, a set of agent management system is needed, namely the management system can not only manage the meters of the enterprise B, but also manage the meters of other enterprises at the same time, and the average management cost is greatly reduced by large-scale management of the meters.

A solution is devised to the above problem.

An instrument management system comprises a management platform and a plurality of managed instruments, wherein the managed instruments are divided into 8 groups including C1, C2, C3, C4, C5, C6, C7 and C8 on the assumption that the management platform faces 8 users similar to enterprise B, wherein the C1 group corresponds to a management instrument group required by the enterprise B, and each other group also corresponds to a corresponding user.

In order to realize the unified management of different users, the instrument management system designs a calibration information template, wherein the calibration information template comprises general items and data items, the general items comprise one or more items of a calibration mechanism, a calibrator, calibration personnel, environmental conditions and magnitude transmission specifications, and the data items comprise result data items of calibration items.

A meter to be controlled for access is required to have: the meter calibration information template is stored in a table before access, the format of the meter calibration information template is consistent with the calibration information template, the number of general items is determined, the meter supports the storage of calibration information data according to the general items and data items of the calibration information template, and the stored calibration information data can be called by a meter management system.

The requirement for the meter to be accessed for management can be that for a user, the meter with corresponding functions can be directly purchased, or a storage module can be added to the existing meter and software adjustment and modification are carried out.

Take group C1 and enterprise B as examples.

Enterprise B inserts each instrument in the C1 group into the instrument management system, and this access can be continuous, also can regularly insert, when first inserting the system, the management platform extract instrument calibration information template from each instrument in the C1 group, the management platform distributes independent identification code for each inserted instrument, binds identification code and instrument calibration information template and then stores in the management platform end, forms platform calibration information template, at this moment, platform calibration information template and managed instrument be one-to-one correspondence.

Periodically, the enterprise B calibrates the meters in the group C1, generates calibration information data and enters the calibration information data.

When the enterprise B needs to inspect the meters, each meter is connected to the meter management system, and the management platform can perform inspection according to the inspection cycle setting preset by the user/the inspection instruction sent by the user, which specifically includes:

step one, platform calibration information templates corresponding to all the instruments in the C1 group are called one by one, and data item data in calibration information data are called from the corresponding instruments;

comparing the data item data according to a preset comparison mode, and outputting a comparison result;

and step three, under necessary conditions, calling general item data for comparison according to the user instruction, and outputting a comparison result.

Because the processes are all completed through the management platform and the network instant calculation, if the comparison results are normal and the users do not have other requirements, the periodic inspection is completed, for the enterprise B, the instruments of the C1 group are perfectly and quickly managed, the cost of the management platform is shared by a plurality of users, and the management cost and the labor cost of the enterprise are greatly reduced.

The preset comparison mode in the second step comprises limit value comparison and/or trend comparison.

The limit value comparison is that a user sets one or more groups of limit values according to needs, for example, for an error indicating number, the limit value is single limit value data, and as the error indicating number generally increases or fluctuates slowly along with the use of the instrument, a first limit value can be set for a high-precision range, a second limit value is set for a medium-precision range, a third limit value is set for a low-precision range, and an evaluation result is given by the management platform according to the limit value range in which the actual value of the error indicating number falls.

The trend comparison is that the management platform arranges data items according to time in each calibration period, and uses a least square method to simulate a trend function, taking error indication as an example, the form of the trend function is defaulted to be a primary function, a user can manually adjust the function form, the management platform can calculate the expected value of the data item in the next calibration period, and compares the expected value with a limit value according to the expected value to give an evaluation result.

The general item comparison in the third step is mainly credibility comparison, that is, when the data item data comparison is in question, the general item comparison is used to solve the question, and the general question situations may include changes of the data item data that do not conform to normal laws, situations in which the comparison result of the data item data is ambiguous, situations in which the valid value of the data item data needs to be further specified by means of information such as calibrator/magnitude transfer specification in the general item, and the like. In consideration of the defects of expert talents in the field of calibration and analysis of medium and small enterprise users, the step is carried out on the management platform, technical support and technical help can be provided by means of talents other than the users, and due to the flexible utilization of talent resources, the cost can be saved for the users.

The same can be said for the users in the C2 group, in order to distinguish the users, different partitions can be opened up for different users on the management platform, so that different users can only see the information related to themselves and cannot see the information of other users when logging in the management platform.

The scheme solves the problem of unified management of different user instruments, and has excellent functions of data confidentiality and data security.

As described in this embodiment, after the management platform completes processing the calibration information data, the relevant information is deleted, that is, the management platform is only used as a high-speed processing end of information, and the holder of the data is still the user, so that the problem of data loss which may occur is avoided; when a user is not satisfied with the service of one management platform, the user can conveniently dock another management platform without data migration.

Because the instrument and the calibration information are bound on a physical layer, the reliability of data can be improved to the maximum extent, and the error identification caused by the management of a plurality of instruments is reduced.

In order to realize the credibility evaluation of the calibration information data, an online calibration information data entry system is designed, and the system can be directly carried on a management platform and can also independently run.

An online calibration information data entry system comprises a processing unit, a calibration element database, a data writing unit and a data reading unit;

the detection/metering mechanism can register and fill in calibration element data on line, including calibration mechanism, calibrator, environment condition and quantity value transmission standard and provide corresponding certification data, after passing the verification, the calibration element data passing the verification is stored in the calibration element database, and the mechanism can also obtain the write-in authority of the corresponding calibration element data;

when calibration information data needs to be written, as shown in fig. 4, an organization logs in an online calibration information data entry system, reads the calibration information data through a data reading unit, extracts general item data in the calibration information data and uploads the general item data to a processing unit, and the processing unit compares the general item data with data in a calibration element database according to the login information of the organization; if the mechanism has the write-in authority of the corresponding calibration element information, the mechanism is allowed to write the relevant data into the instrument through the data write-in unit; if the mechanism does not have the writing authority of the corresponding calibration element information, the mechanism does not register the writing authority without any general item data, and the mechanism also has the registered writing authority with the general item data, but the general item data to be written is not consistent with the calibration element information verified by the mechanism after the general item data is compared with the data in the calibration element database, the mechanism is rejected to write the relevant data into the instrument through the data writing unit.

It should be added that the above-mentioned permission/rejection mechanism writes the relevant data into the meter through the data writing unit, which may include allowing the relevant data to be written into the meter through the data writing unit, but according to the comparison, marks "verified", "unverified" or the like after the written data.

If the online calibration information data entry system is directly mounted on the management platform, the processing unit, the calibration element database, the data writing unit and the data reading unit can be combined with similar functional units of the management platform.

Data entry is performed on the basis of the online calibration information data entry system, and for example, after completion, the following situations may be included:

the data of a certain group of calibration information has complete data items, and the general data items are all empty or partially empty;

the data item data is not only complete but also general in a certain group of calibration information data, but part or all of the data item data is marked as 'unverified';

the data item of a certain group of calibration information data not only has complete data item data, but also has complete general item data, and the general item data is marked as verified or has no mark;

the integrity is with respect to the corresponding meter calibration information template/platform calibration information template, since the entry of calibration information data is based on the meter calibration information template, data not in the meter calibration information template is obviously not related to integrity or not.

Detailed description of the preferred embodiment

As shown in fig. 5, an instrument management platform system, according to the application scene difference, instrument management platform system can set up on certain server in the local area network, also can set up in the high in the clouds, for this embodiment, instrument management platform system set up in the high in the clouds.

The instrument management platform system comprises a storage unit, an identification unit, a processing unit and a data interaction unit.

The storage unit is used for data storage and comprises a template area, a calibration element area and an identification area, wherein the template area is used for storing a platform calibration information template, the calibration element area is used for storing calibration element data passing verification, and the identification area is used for storing the address, the identification code and other identification data of a managed instrument.

The identification unit is used for identifying a received data source, and the specific identification mode comprises address identification and code identification.

The management platform system comprises an identification unit, an instrument management platform system and a storage unit, wherein the identification unit records a data address of a managed instrument when the managed instrument is accessed into the instrument management platform system, the recorded address is stored in the storage unit, when the data is received again, the identification unit calls an address record from an identification area of the storage unit and compares the address record, and a data source corresponding to the address information is a corresponding managed instrument; if necessary, the identification unit also supports virtual address allocation to the managed instrument, and if so, the recorded data address is the virtual address.

The identification unit is used for identifying the identification codes which are respectively independent of the managed instrument when the managed instrument is connected to the instrument management platform system, sending the identification codes to the managed instrument, requiring the managed instrument to be accompanied by the identification codes when uploading data, checking whether the data contains the identification codes by the identification unit when receiving the data again, calling the identification codes from the identification area of the storage unit and comparing the identification codes if the data contains the identification codes, and obtaining the corresponding managed instrument as the data source matched with the identification code information.

In the present embodiment, the above two identification methods are simultaneously supported, and the code identification is used as the primary identification method, and the address identification is used as the backup identification method.

And the data interaction unit is a data interaction function unit between the instrument management platform system and the communication network and is used for reading the data sent to the instrument management platform system from the communication network and sending the data to a corresponding object according to a processing unit command.

The processing unit has two functions, one is to control each unit to work according to preset configuration, the other is to process and analyze data, and the following two functions are specifically analyzed through a workflow.

Calibration element data entry workflow:

the instrument management platform system supports verification and entry functions of calibration element data, a calibration/metering mechanism can register a machine configuration user on the instrument management platform system through the Internet, calibration element data such as mechanism names, calibrators, calibration personnel, environmental conditions and magnitude transmission specifications are submitted, a data interaction unit can transmit the calibration element data to the processing unit after receiving the calibration element data, the processing unit performs form verification and/or content verification on the calibration element data, the form verification is used for verifying whether certification documents corresponding to various calibration element data are prepared or not, the content verification is used for verifying authenticity and conformity of the certification documents, and the content verification process can be manually guided or assisted; after the verification is completed, the calibration element data passing the verification is stored in the calibration element area of the storage unit, and the user of the machine configuration is given the calibration element data write authority (i.e. the general item data write authority) corresponding to the calibration element data passing the verification.

Calibration information data entry workflow:

and the instrument management platform system is designed with a calibration information data writing tool in a related mode, and the calibration information data writing tool comprises a network interaction port, a terminal interaction port, a human-computer interaction interface and a processing verification component.

The calibration information data writing tool can be configured locally, for example, the processing verification component and the man-machine interaction interface are supported by a computer in a laboratory as hardware and can run offline, in an offline mode, the terminal interaction port is connected with a managed instrument, after data intercommunication is confirmed, the verification component extracts an instrument calibration information template from the managed instrument, an operator enters calibration information data through the man-machine interaction interface according to the instrument calibration information template, general items can be left unfilled, data items in the general items must be filled completely, the operator submits the calibration information data on the man-machine interaction interface after filling, the processing verification component adjusts the calibration information data entered by the operator into a storage format, if the general items have filling contents, the general items are marked as unverified, and files in the storage format are stored in the managed instrument through the terminal interaction port, namely, the calibration information data writing in the off-line mode is completed.

The calibration information data writing tool can run on line, in an on-line mode, the calibration information data writing tool should log in an organization user account of the instrument management platform system, the terminal interaction port is connected with a managed instrument, after data intercommunication is confirmed, the verification component extracts an instrument calibration information template from the managed instrument, an operator enters calibration information data through a man-machine interaction interface according to the instrument calibration information template, general items can be empty and unfilled, data items need to be filled completely, the operator submits the data items on the man-machine interaction interface after filling, the processing verification component sends the general item data to the instrument management platform system through the network interaction port and verifies writing authority, and the data interaction unit receives the verification request information and submits the verification request information to the processing unit, the processing unit calls the verified calibration element data from the calibration element area of the storage unit, compares the verified calibration element data with the general item data to be written in the verification request information, if the verified calibration element data and the general item data are in accordance, the verification is passed, if the verified general item data and the general item data are not in accordance, the verification is failed, the feedback result is transmitted to the network interaction port through the data interaction unit, after the calibration information data writing tool receives the feedback result, the general item data to be written are marked by the processing verification component according to the feedback result, the feedback result is that the general item data to be written are marked with verified or not marked with the verification passed, the feedback result is that the general item data not passed with the verification are marked with unverified, the processing verification component adjusts the calibration information data to be written into a storage format, and stores the file in the storage format to the managed instrument through the terminal interaction port, namely, the calibration information data writing in the online mode is completed.

In the above two calibration information data writing methods based on the calibration information data writing tool, if the managed instrument itself has an independent calibration information data writing mode, the managed instrument can also complete the writing of the calibration information data by itself.

Calibration information data reading workflow:

the reading of the calibration information data is from a specific instruction, which may be temporarily issued by the user or a preset instruction preset by the user.

Taking the preset instruction as an example, the user can preset to verify ten managed meters numbered 001-010 every 30 days; when the time reaches 30 days, according to the clock signal, the processing unit obtains the preset instruction, the processing unit reads the identification code, the address and the platform calibration information template corresponding to the managed instrument with the number 001-, the data interaction unit receives the data packet fed back by the 001 managed instrument and decrypts and demodulates the data packet to form data to be identified, the data to be identified is transmitted to the processing unit, the processing unit extracts an identification code in the data to be identified and transmits the identification code to the identification unit, the identification unit compares the identification code by using the identification area of the storage unit to confirm that the identification code corresponds to the 001 managed instrument with the number, the result is fed back to the processing unit, the processing unit receives the feedback information of the identification unit and changes the data to be identified into the data of the 001 managed instrument with the number, and the processing unit extracts a platform calibration information template of the 001 managed instrument with the number from the template area of the storage unit, and reading the data item data in the data of the managed instrument with the number 001 by using the platform calibration information template, and completing the reading workflow by analogy with the workflow way of the managed instrument with the number 002-010.

Different from the preset instruction, in the process of temporarily giving the instruction by the user, the starting signal of the processing unit is the user temporary instruction, in addition, the preset instruction generally does not relate to the acquisition requirement of general item data, the user temporary instruction requirement possibly comprises the general item data, and in other aspects, the workflow of the two instruction modes is basically the same.

Calibration information data analysis workflow:

calibration information data analysis is generally performed after the calibration information data is read, taking the data of the instrument to be managed with the number 001 as an example, assuming that the instrument to be managed with the number 001 is a room temperature meter and the standard verification reading thereof is 15/20/30 ℃, combining the platform calibration information template of the instrument to be managed with the number 001, six groups of data can be obtained, namely, a 15 ℃ detected value, a 15 ℃ indicating value error, a 20 ℃ detected value, a 20 ℃ indicating value error, a 30 ℃ detected value, a 30 ℃ indicating value error and the time period of the self-variable coordinates of the six groups of data respectively; analyzing limit values, for example, setting the limit value to be 1.5 ℃ for the indication error of 15 ℃, and correspondingly detecting the indication value of 15 ℃, wherein the limit values are 13.5 ℃ and 16.5 ℃; comparing each datum in the indicating error of the limiting value of 1.5 ℃ and the indicating error of 15 ℃, wherein if the indicating error data of 15 ℃ is less than or equal to 1.5 ℃, the managed instrument of the number 001 in the corresponding time period meets the requirement of the precision, and if the indicating error data of 15 ℃ is greater than 1.5 ℃, the managed instrument of the number 001 in the corresponding time period does not meet the requirement of the precision; after the analysis and comparison are completed, the comparison result is fed back to the processing unit, and the processing unit is edited into a human-computer readable mode and transmits the human-computer readable mode to the human-computer interaction interface.

Detailed description of the invention

As shown in fig. 6 and 7, an industrial meter supporting the meter management system of the present invention includes a primary variable measuring module, a storage module, a battery module, a processing module, and a communication module and a housing.

The main variable measuring module comprises a sensor element and an analog-to-digital conversion element, the sensor element can acquire a main variable signal, for example, a main variable of a pressure gauge is the pressure of a measuring object, the analog-to-digital conversion element receives the main variable analog signal of the sensor element, converts the main variable analog signal into a main variable digital signal, and then transmits the main variable digital signal to the processing module to realize the measurement of the main variable; in the temperature and humidity meter provided by the embodiment, the sensor element comprises a temperature sensor and a humidity sensor which share one set of analog-to-digital conversion element, the measuring ends of the temperature sensor and the humidity sensor are arranged on the surface of the shell, and the other parts of the primary variable measuring module are arranged inside the shell; the operation of the sensor element and the analog-to-digital conversion element is controlled by the processing module.

The storage module is arranged in the shell and comprises a template area and a data area, a set of instrument calibration information template is stored in the template area, the instrument calibration information template of the hygrothermograph is shown in fig. 8, the instrument calibration information template comprises general items and data items, the general items comprise 5 items including a calibration mechanism, a calibrator, environmental conditions and a quantity value transmission standard, the data items correspond to result data items of the calibration items and generally comprise standard instrument expression, detected instrument expression and errors, and with respect to the hygrothermograph instrument calibration information template of the embodiment, because 2 main variables for measurement are provided, namely temperature and humidity, the data items correspond to 6 items which are respectively standard reading (temperature), detected instrument expression (temperature), indication error (temperature), The reading (humidity) of the standard instrument, the indication value (humidity) of the detected instrument and the indication error (humidity); furthermore, if the measuring range and the use scene of the industrial instrument are determined, for example, a certain temperature and humidity meter is mainly used for measuring the indoor temperature, and key temperature points can be determined to be 15 ℃, 20 ℃ and 30 ℃, the detailed definition is carried out in the instrument calibration information template; in summary, the general items in the instrument calibration information template may be the same or different for different instruments, but the selection range of the general items is limited to 5 items of calibration mechanism, calibrator, environmental condition and magnitude transmission specification, and preferably all the items are selected as the general items; the data items in the instrument calibration information template are generally different for different types of instruments, and are generally the same for the same type of instruments, but the data items of any instrument should include three items of standard, detected and error as much as possible.

The data area is stored with calibration information data, the calibration information data is stored according to the instrument calibration information template, this embodiment shows a partial calibration information data storage example of the above-mentioned hygrothermograph as shown in fig. 9, the calibration information data includes three parts of occurrence time, general item data and data item data, the calibration period is defined as 1 year, the hygrothermograph is put into use after being shipped, so calibration is performed once every 1 year, for the factory calibration information data, it includes 2015 year, 1 month, 1 day, general item data 5 items, which are consistent with the general items of the instrument calibration information template and have specific contents, the data item data has 6 groups, which are respectively a 15 ℃ temperature data group, a 20 ℃ data group, a 30 ℃ data group, a 40% humidity data group, a 60% humidity data group, and an 80% humidity data group, taking a 15 ℃ temperature data set as an example, each data set comprises a standard device reading, a detected instrument indicating value and an indicating value error; in the calibration period (i.e., each year) after shipment, a set of calibration information data corresponds to each other, and it can be known by comparison that, although data items of the calibration information data of each set change in the indication value and the error indication value of the device to be detected over time, the data items are consistent and complete in content type, and on general item data, although there are corresponding content types in the 1 st year and the 2 nd year after shipment, not all general item items have specific data correspondence, for example, data of general items in the 1 st year after shipment are assigned null.

The calibration occurred at 2018.1.1, and unlike others, the time node was calibrated for temperature measurements, and since there is no flag, the default is that the recorded data is calibrated data.

The calibration occurred at 2020.1.1 time, and unlike others, there are 6 sets of humidity data at the time node, two sets of 40% humidity data, 60% humidity data, and 80% humidity data, respectively, indicating that calibration occurred at the time point, the former data being pre-calibration data, and the latter data being post-calibration data.

The battery module is arranged in the shell and is electrically connected with each module and supplies power to each module so as to realize normal work.

The communication module is used for data interaction between the industrial instrument and the outside, taking the temperature and humidity meter of the embodiment as an example, the communication module comprises a communication processing element, a wireless transceiver element, an internal port and an external port, the external port is arranged on the surface of the shell and is a universal USB port, other parts of the communication module are arranged inside the shell, the internal port is an internal information interaction point of the communication module and is in signal connection with the processing module, the wireless transceiver element is used for sending a wireless signal to the outside/receiving an external wireless signal, preferably an NB-loT communication element based on 5G technology, and the communication processing element is used for processing the information received/sent by the communication module to make the information meet the communication requirement; therefore, with the communication module of the present embodiment, wired and/or wireless mode communication is supported.

The temperature and humidity meter further comprises a human-computer interaction interface, the human-computer interaction interface is arranged on the surface of the shell, and the human-computer interaction interface is in signal connection with the processing module and is used for displaying current temperature and humidity readings.

The processing module is used for controlling the module to work, and the configuration function of the processing module is described by the following work.

The method comprises the steps that main variable measurement is conducted, the temperature and humidity meter of the embodiment is taken as an example, the default is achieved, the processing module is configured to conduct temperature and humidity measurement every 10 seconds, according to a clock element of the processing module, when a clock signal is obtained, the processing module sends a measurement instruction to the main variable measurement module, the main variable measurement module collects temperature and humidity data signals according to the measurement instruction and sends the temperature and humidity data signals to the processing module, and the processing module processes the temperature and humidity data signals and sends the temperature and humidity data signals to the man-machine interaction interface to be displayed.

Acquiring a main variable based on an external system command, taking the temperature and humidity meter of the embodiment as an example, sending a temperature and humidity acquisition command to the temperature and humidity meter by the external system, wherein the command reaches the processing module through the communication module, the processing module responds in real time and obtains temperature and humidity data signals according to a basic flow of the main variable measurement, and sends the temperature and humidity data signals to the communication module after processing the temperature and humidity data signals, and the communication module uploads the temperature and humidity data signals after encryption and modulation; the external system command may be transmitted by a wired manner, if so, the external port described herein has to be connected with the external system by a signal line, or the external system command may be transmitted by a wireless manner, if so, the communication module described herein has to be matched and docked with the external system by the signal.

The precision check is that, taking the temperature and humidity meter of this embodiment as an example, an external system sends a command for retrieving calibration information data to the temperature and humidity meter, generally, only data item data in the calibration information data is required to be retrieved, the command reaches the processing module through the communication module, the processing module responds in real time and retrieves corresponding calibration information data from the storage module, and transmits the calibration information data to the communication module, and the calibration information data is uploaded after being encrypted and modulated by the communication module; here, the temperature and humidity meter is only used as a storage carrier of data, and a specific data analysis operation of the precision verification is realized by an external system.

The calibration information data is written, for example, the temperature and humidity meter of this embodiment is configured to enter a calibration information data writing mode, and in this mode, the processing module does not periodically control the primary variable measuring module to read data according to the normal mode, but is based on a control command, and the control command may be from a human-computer interface or a communication module.

Writing in the human-computer interaction interface, as shown in fig. 10, in this case, an operator manually controls the temperature and humidity meter to measure the temperature and humidity, and after the measurement is completed, the processing module automatically transmits and displays the measurement data on the human-computer interaction interface; meanwhile, the processing module checks whether calibration information data in an unfinished state exist or not, if not, a group of new calibration information data is established according to the instrument calibration information template, the state of the new calibration information data is marked as unfinished, general data in the group of new calibration information data is default to be null, and the indication number of the detected instrument in the data item data is formed by the measurement data; if the calibration information data in an unfinished state exists, the measurement data is directly written into the set of calibration information data as the newly added indication number of the detected instrument;

the processing module consults the new calibration information data after writing the readings of the detected instrument each time, so that the readings of the detected instrument do not have corresponding standard device readings, the input of the standard device readings is prompted on a human-computer interaction interface, after the input of the standard device readings on the human-computer interaction interface, the processing module calculates a difference value according to the measurement data and the standard device readings to generate error readings, and the standard device readings and the errors are implemented and written into the new calibration information data;

the above process is repeated, and it should be noted that, in the repeating process, the temperature and humidity measurement data can be entered first, or the data of the standard device can be entered first, and the two can be performed alternately, or one operation can be performed continuously first and then another operation can be performed continuously, the preferred mode is to enter the temperature/humidity data once, enter the corresponding data of the standard device, and perform the sequential circulation, and the sequential circulation mode is convenient for checking and reducing the possibility of wrong input/missing input;

after finishing all measurement data acquisition and reading input of the standard device, an operator manually stops the calibration information data writing mode from the man-machine interaction interface, at the moment, the processing module can carry out data item integrity verification on new calibration information data, after confirming that the reading of the standard device corresponds to the measurement data one to one and each item of the data item has specific data, the processing module feeds back the man-machine interaction interface, prompts input of calibration time, after the operator inputs the calibration time, the processing module inputs the calibration information data at the calibration time, the new calibration information data becomes a finished state, and the calibration information data writing mode is closed.

The control writing-in through the communication module is similar to the situation of the human-computer interaction interface, the difference between the situation and the situation is that the command source of the thermometer and the command source of the thermometer is different, and under the control writing-in situation through the communication module, the feedback of the processing module to an operator/an external system can be sent to the human-computer interaction interface and also can be sent to the external system through the communication module, namely, the control writing-in combining the human-computer interaction interface and the communication module is allowed.

Writing data through the communication module, in this case, the external system directly writes new calibration information data into the thermometer through the communication module, the new calibration information data reaches the processing module through the communication module, the processing module checks the integrity of the new calibration information data according to the instrument calibration information template, if the data item data and the calibration time are complete, the next step is carried out, if the data item data and/or the calibration time are missing, the information is fed back to the external system through the communication module to be missing, and the next step is carried out after the data is supplemented; after the integrity check of the new calibration information data is completed, optionally, the validity of the new calibration information data can be checked, the processing module checks whether general item data in the new calibration information data is not empty, if so, further checks whether check codes are attached to the general item data which is not empty, if yes, the general item data which is not empty is marked as passed, the general item data to be written is marked as verified or unmarked, and if not, the general item data to be written is marked as unverified or refused to be written; after the integrity and possible validity check of the new calibration information data are completed, the calibration information data allowed to be written are written into the storage module for storage, if marked, and written together with the mark.

Detailed description of the preferred embodiment

In order to better analyze the managed instrument, a further method for analyzing the accuracy stability of the instrument is designed on the basis of the accuracy analysis.

In general, when a meter needs to be analyzed by using calibration information data, the calibration information data occurs before a time to be analyzed, and the calibration information data and the time to be analyzed are temporally misaligned, so that omission or deviation may exist in the process of simply judging whether the current reading of the meter meets the requirement or not according to whether the calibration information data meets the requirement or not, and therefore, the stability of the accuracy of the meter (which may also be referred to as the stability of the reading of the meter or the stability of the meter) needs to be analyzed.

Generally, in the initial stage of the use of the instrument, the performance of each component is good, and basically no offset occurs or the offset rate is determined, at this time, the current condition of the instrument can be directly judged by using calibration information data with earlier time; as the meter is used, each component starts to age, and the meter reading starts to shift, but because the aging direction of the component is determined, the shift amount at this stage is relatively small, and the shift condition is predictable, at this time, when the calibration information data before the use time is used for judgment, the current condition of the meter needs to be judged by properly considering the expected shift condition; as the service life of the instrument is gradually approached, the accuracy and stability of the instrument are increasingly poor, and the effectiveness of calibration can be ensured by means of shortening the calibration period and the like possibly; but at any stage, the meter stability analysis is indispensable.

As shown in FIG. 11, taking the error indication as an example, if a certain meter has been used for 5 years and is calibrated once per year, the calibration data of each period is defined as D₀、D₁、D₂、D₃、D₄And D₅Wherein D is₀Data representing calibration information at the time of shipment, D₁And the calibration information data corresponding to the calibration period of the first year is shown, and the like.

First, it is checked whether there is any situation of alignment in each group of data, which includes: with and without alignment marks but with a sudden reduction in the error reading.

If the adjustment condition is not detected, the stability analysis can be directly carried out by using each group of data.

End point method, calculating the variation difference of error indication number, = | D_5- D₀And | the larger the representation error, the larger the change of the index.

By a point method, the variation difference of the error readings of each year is calculated one by one_i，_i=|D_i- D_i-1Where i denotes the number of calibration cycles/year,_ithe larger the characterization error the more the index changes.

The trend method is based on the point division method and uses the least square method to fit the error index change difference value_iThe trend function is a linear function_iThe two factors of = ai + b, a and b together form the influence evaluation factor of the error indication, wherein b represents the basic error deviation caused by the aging of the component over time, and a represents the accelerated error deviation caused by the component over time.

Generally, the endpoint method is suitable for the early stage of the life of the instrument because the instrument usually has no error or the error indication changes little and stably in the period of time, the integral condition can be fully reflected by the endpoint method, and the point division method and the trend method are suitable for the middle and later stages of the life of the instrument because the change of the error indication of the instrument is relatively complicated in the period of time.

If the calibration condition is found to exist, further subdivision is needed.

The only data after calibration includes data with calibration marks but only data after calibration in the current period, and data without calibration marks.

Such as D₃The reading corresponds to the condition of only the data after adjustment, then D₀、D₁And D₂Constitute a first analysis group, D₃、D₄And D₅Forming a second analysis group, and calculating the variation difference of error readings of each year one by one_i，_i=|D_i- D_i-1If the first analysis set includes₁And₂the second analysis group comprises₄And₅using trend method pair₁、₂、₄And₅mean change difference of fitting error_iFirst order trend function of_iIf a =0 and b =0, it indicates that the error indication is stable and unchanged, and the stability of the meter is very good, if a =0 and b > 0, it indicates that the error indication is only a normal deviation caused by gradual aging of the component, and if a > 0 and b > 0, it indicates that the aging of the component not only causes the accuracy of the component itself to be reduced, but also brings a chain reaction to the state of the whole meter, and in this case, the stability of the meter is generally considered to be poor.

The data after the adjustment and the data before the adjustment are simultaneously provided, namely, the data is provided with an adjustment mark and simultaneously provided with two groups of data before the adjustment and the data after the adjustment at the present time.

Such as D₃The readings include pre-calibration data D₃₁And adjusted data D₃₂Calculating the variation difference of error indication of each year one by one_i，_i=|D_i- D_i-1L wherein₃=|D_31- D₂|，₄=|D_4- D₃₂I, using trend method pair_iFitting a linear trend function_iAnd if a =0 and b =0, the error indication is stable and unchanged, the stability of the instrument is very good, if a =0 and b > 0, the change of the error indication is stable, the stability of the instrument is general, if a > 0 and b > 0, the change of the error indication is unstable, and generally, the situation can cause the error of the instrument to change rapidly along with time, and the change can cause the stability of the instrument to be poor.

Claims

1. An instrument management system, comprising a management platform and a managed instrument, characterized in that:

presetting a calibration information template, wherein the calibration information template comprises a general item and a data item, the general item comprises one or more items of a calibration mechanism, a calibrator, an environmental condition and a magnitude transmission specification, and the data item comprises result data of a calibration item;

the managed instrument comprises a storage module and a communication module, the storage module stores the calibration information template and periodically stores calibration information data according to the calibration information template, and the communication module uploads the calibration information data;

the management platform is pre-stored with the calibration information template corresponding to the managed instrument, and is configured to read data item data in calibration information data of the managed instrument according to the calibration information template according to instructions, analyze the data item data and further evaluate the accuracy and/or stability of the managed instrument.

2. The instrument management system of claim 1, wherein: the managed instrument is connected to the instrument management system for the first time, and the calibration information template is uploaded to the management platform.

3. The instrument management system of claim 2, wherein: the management platform reads the calibration information template from the managed instrument when the managed instrument is firstly accessed into the instrument management system.

4. The instrument management system of claim 1, wherein: the management platform is configured to read general data in the calibration information data of the managed instrument according to the calibration information template according to instructions so as to evaluate the credibility of the data item data.

5. An instrument management platform, comprising a reading unit and a processing unit, characterized in that:

the instrument management platform further comprises a template unit, wherein the template unit stores a calibration information template, the calibration information template comprises general items and data items, the general items comprise one or more items of a calibration mechanism, a calibrator, calibration personnel, environmental conditions and magnitude transfer specifications, the data items comprise result data of the calibration items, and the calibration information template corresponds to a managed instrument managed by the instrument management platform;

the reading unit is used for reading data from the managed instrument;

the processing unit is used for controlling reading and analysis of data, and is configured to retrieve the calibration information template from the template unit, control the reading unit to read data item data in the calibration information data from the managed instrument according to the calibration information template, and analyze the data item data to evaluate the accuracy and/or stability of the managed instrument.

6. The instrument management platform of claim 5, wherein: the source of the calibration information template is that the managed instrument is connected to the instrument management platform for the first time, and the calibration information template is uploaded.

7. The instrument management platform of claim 5, wherein: the processing unit is configured to read general data from the managed instrument according to the calibration information template according to instructions, and further evaluate the credibility of the data.

8. An industrial instrument, includes processing module, storage module and communication module, its characterized in that:

the storage module comprises a template area and an information area, the template area stores a calibration information template, the calibration information template comprises a general item and a data item, the general item comprises one or more items of a calibration mechanism, a calibrator, an environmental condition and a magnitude transmission specification, and the data item comprises result data of a calibration item; the information area is used for storing calibration information data;

the communication module is used for downloading and/or uploading data;

the processing module is configured to store calibration information data to the information area according to the calibration information template, and extract and upload data item data and/or general item data in the calibration information data from the information area.

9. Industrial meter according to claim 8, characterized in that: the processing module is configured to upload the calibration information template upon detecting initial access of the industrial meter to the management system.

10. An industrial meter accuracy evaluation method based on the meter management system according to claim 1, characterized in that:

the management platform is configured to periodically read data items from the managed instrument, analyze the data items, and evaluate the accuracy of the managed instrument.

11. An industrial meter stability evaluation method based on the meter management system according to claim 1, characterized in that:

the managed instrument at least stores two groups of calibration information data with different occurrence times;

selecting data item data with earlier occurrence time, and if the data item data before adjustment and the data item data after adjustment exist, determining the data after adjustment as a front group of comparison data;

selecting data item data with later occurrence time, and if data before adjustment and data after adjustment exist, determining the data before adjustment as rear group comparison data;

and obtaining the difference value between the front group of comparison data and the rear group of comparison data, wherein the smaller the difference value is, the better the stability of the managed instrument is.

12. The industrial meter stability assessment method of claim 11, wherein: the managed instrument has three or more groups of calibration information data with different occurrence times, the difference value of two groups of data item data adjacent at each time is obtained, and the change rate of the difference value is calculated, wherein the smaller the change rate of the difference value is, the better the stability of the managed instrument is.

13. The industrial meter stability assessment method of claim 12, wherein: in the data items adjacent to the time, the data items with later occurrence time have alignment and have no post-alignment data, so that the difference value of the data items adjacent to the time does not participate in calculation.

14. The industrial meter stability evaluation method according to any one of claims 11 to 13, wherein: and selecting error indicating value data in the data item data, and if the error indicating value data with later occurrence time is smaller than the error indicating value data with earlier occurrence time, judging that the data item data with later occurrence time is in alignment.

15. The industrial meter stability evaluation method according to any one of claims 11 to 13, wherein: and extracting error indicating value data in the two groups of data and comparing the error indicating value data, wherein the data item data corresponding to the smaller error indicating value data is the data after adjustment.