A method and system for comparative measurement of an automatic acquisition device

Abstract

The present application provides a method and system for comparing and measuring an automatic acquisition device, which relates to the field of evaluating and identifying the reliability of automated measurement in monitoring. The method includes: obtaining the measured value sequences χ zi and χ ri of the automatic acquisition device and the reading instrument for the points to be measured in the same time period for n measurements; taking the median values χ zi and χ ri of the measured value sequences χ z and χ r ; taking δ χ as the measured value deviation between the automated and manual measurements of the points to be measured, and calculating the measurement limit difference σ χ of the comparison measurement; evaluating the comparison measurement result of the points to be measured according to the inequality δ χ ≤2σ χ . The system includes an automatic acquisition device, a reading instrument, and an intelligent terminal. The method and system improve the rationality and accuracy of the comparison measurement result and greatly enhance the efficiency of the comparison measurement work.

Description

Technical Field

[0001] This application relates to the field of evaluating and identifying the reliability of automated measurements in safety monitoring, and more particularly, to a method and system for comparing and measuring an automatic acquisition device. Background Art

[0002] Currently, automated monitoring is becoming increasingly popular. For example, in the automated safety monitoring of a hydropower dam, when the reservoir dam safety monitoring system abandons the traditional low-frequency manual observation method and switches to a high-frequency automated monitoring method, although the real-time monitoring is greatly improved, the reliability of the monitoring data is constantly tested by various factors such as the performance of the monitoring instruments, the performance of the automatic acquisition device, and the system operating environment. Therefore, how to evaluate and identify the measurement reliability of the automatic acquisition device has become a new problem.

[0003] Manual comparison and measurement is an important means to evaluate the reliability of the measured values of the automatic acquisition device. Specifically, the manual measured values of a qualified secondary instrument such as a reading instrument are used as the standard, and the automated measured values of the instruments connected to each channel of the automatic acquisition device are compared under the same time period and the same conditions. Manual comparison and measurement takes into account unbalanced factors such as the performance of the monitoring instruments and the operating environment, and can objectively reflect the measurement accuracy of the automated system. However, the following problems exist in the practical process:

[0004] The rationality and accuracy of the comparison and measurement results obtained by using the comparison and measurement method of the existing technology need to be improved. Summary of the Invention

[0005] The purpose of this application is to provide a method and system for comparing and measuring an automatic acquisition device, which can make the comparison and measurement results more reasonable.

[0006] This application is implemented as follows:

[0007] In a first aspect, this application provides a method for comparing and measuring an automatic acquisition device, including: obtaining measurement value sequences χ zi and χ ri of the automatic acquisition device and the reading instrument for n measurement times at the same time period for the measurement points to be measured, where n is a natural number greater than or equal to 2; taking the median values χ zi and χ ri of the measurement value sequences χ z and χ r ; obtaining δ χ as the measurement deviation between the automation and manual measurements of the measurement points to be measured according to the following formula; δ χ = χ z - χ r ; obtaining the measurement accuracies of the automatic acquisition device and the reading instrument as σ χz and σ χr; Set the range coefficient C according to the different measurement times of the comparison measurement data sequence; According to the following formula, respectively obtain the standard deviations of χ zi and χ ri in the measured value sequence of the point to be measured as e χz and e χr , Calculate the measurement limit error σ χ of the comparison measurement according to the following formula; Evaluate the comparison measurement result of the point to be measured according to the inequality δ χ ≤2σ χ . If it meets the requirements of the inequality, the manual comparison measurement of the measured value of the corresponding point to be measured is marked as qualified, otherwise it is unqualified.

[0008] Based on the first aspect, the measured value includes frequency or / and temperature.

[0009] Based on the first aspect, the measured values are frequency and temperature, and the measurement times are 3 - 7 times, forming 1 group of frequency measured value sequences f zi and f ri and 1 group of temperature measured value sequences T zi and T ri ; Respectively obtain the median values of each measured value sequence, which are f z and f r , T z and T r ; Obtain δ f and δ T as the frequency deviation and temperature deviation between the automation and manual measurements of this measuring point according to the following formula; δ f =f z -f r ; δ T =T z -T r ; According to the instruction manuals of the automatic acquisition device and the reading instrument, obtain the accuracies of the frequency measurement and temperature measurement of the automatic acquisition device and the reading instrument. Let the measurement accuracy of the automatic acquisition device be σ fz , σ Tz , and the measurement accuracy of the reading instrument be σ fr , σ Tr ; Set the range coefficient C according to the different measurement times of the comparison measurement data sequence; When the measurement time is 3, the range coefficient C is 1.69; When the measurement time is 4, the range coefficient C is 2.06; When the measurement time is 5, the range coefficient C is 2.33; When the measurement time is 6, the range coefficient C is 2.53; When the measurement time is 7, the range coefficient C is 2.70; According to the following formula, respectively obtain the standard deviations of f zi and f ri in the frequency measured value sequence of the measuring point as e fz and e fr , respectively obtain the temperature measured value sequence T of the measuring pointzi and T ri standard deviation e of Tz and e Tr ;

[0010]

[0011] Calculate the limit error of frequency comparison measurement σ f and the limit error of temperature measurement σ T ; According to the inequality δ f ≤2σ f and δ T ≤2σ T Evaluate the comparison measurement results of the points to be measured; if the inequality requirements are met, the manual comparison measurement items of the frequency measurement value or temperature measurement value of the corresponding point to be measured are evaluated as qualified, otherwise as unqualified.

[0012] In a second aspect, the present application provides a comparison measurement system for an automatic acquisition device, including: an automatic acquisition device configured to: receive a channel number switching instruction and switch to the corresponding channel; receive a mode query and switching instruction, query the mode of the channel, and switch the channel to the corresponding measurement mode; receive a data acquisition and sending instruction, perform the corresponding number of acquisitions in this mode on this channel according to the previously determined number of measurement times, and send multiple acquisition results to the intelligent terminal; receive a comparison measurement switching instruction and conduct the channel to the comparison measurement port; a reading instrument configured to: receive a mode switching service instruction, obtain the mode of the current channel of the automatic acquisition device, receive and issue a mode switching instruction; receive a data sending service instruction and send the measurement data of the corresponding number of measurement times collected in real time to the intelligent terminal; an intelligent terminal with a built-in comparison measurement APP configured to: issue instructions to the automatic acquisition device or / and the reading instrument; and receive data, process the data using the above method and perform visual display; the intelligent terminal communicates with the automatic acquisition device and the reading instrument wirelessly, and the wireless communication methods include WiFi and Bluetooth.

[0013] Based on the second aspect, the automatic acquisition device includes a multi-channel acquisition port configured to connect to each monitoring instrument to establish a channel for data transmission; a channel switching module configured to receive a channel number switching instruction and switch to the corresponding channel; a comparison measurement switching module configured to receive a comparison measurement switching instruction and conduct the channel to the internal or comparison measurement port; a first channel multiplexing module configured to select the channel according to a preset gating logic; a first signal acquisition module configured to perform the corresponding number of acquisitions in this mode on this channel according to the previously determined number of measurement times; a first processor configured to process the acquired data; and a first communication module configured to send the processing result to the intelligent terminal.

[0014] Based on the second aspect, the comparison and measurement switching module includes three groups of double-pole double-throw relay circuits connected to each other. The input end of the relay circuit is connected to the first processor, and the output end is connected to the first channel multiplexing module or the comparison and measurement port. The first processor is used to control the high and low levels of the pins of the connected Darlington tube, so as to drive and control the ch1 level of the relay circuit to select the monitoring instrument signal to the first channel multiplexing module or the comparison and measurement port.

[0015] Based on the second aspect, the reading instrument includes: a measurement port for establishing a communication connection with the comparison and measurement port; a second channel multiplexing module configured to select channels according to a preset gating logic; a second signal acquisition module configured to perform corresponding number of acquisitions on this channel according to the pre-determined measurement times in this mode; a second processor configured to process the acquired data, receive a mode switching service instruction, obtain the mode of the current channel of the automatic acquisition device, receive and issue a mode switching instruction; a display module for visually displaying the processing result; and a second communication module configured to send the processing result to the intelligent terminal.

[0016] Based on the second aspect, the intelligent terminal includes: a third communication module configured to receive data from the automatic acquisition device and the reading instrument; a data processing module configured to process the received data; a display and interaction module configured to display the processing result, and detect the user's operation and generate an instruction to be issued to the automatic acquisition device or / and the reading instrument; a storage module configured to store the data; and a comparison and measurement report generation module configured to generate a comparison and measurement report according to the processing result.

[0017] Based on the second aspect, the mode of the channel includes a compatible comparison and measurement mode and a full-automatic comparison and measurement mode; when the compatible comparison and measurement mode is selected, the comparison and measurement APP is only connected to the automatic acquisition device. The user issues a channel number switching instruction through the comparison and measurement APP to control the automatic acquisition device to switch to the corresponding channel, perform 1 online acquisition and display the data on the comparison and measurement APP interface. Subsequently, the comparison and measurement APP controls the channel to switch to the comparison and measurement port and waits for the measurement of the reading instrument; when the full-automatic comparison and measurement mode is selected, the comparison and measurement APP is connected to the automatic acquisition device and the reading instrument. The user selects the measurement times through the comparison and measurement APP. During the comparison and measurement, the comparison and measurement APP controls the automatic acquisition device to perform automatic acquisition device measurement and reading instrument measurement in sequence according to the channel order, displays the measured values of each measurement time in real time, automatically calculates each measured value using the automatic acquisition device comparison and measurement method, and outputs the comparison and measurement result; and when the comparison and measurement of all channels of the automatic acquisition device is completed, determine the channels that need to be re-measured according to the comparison and measurement result, and perform re-comparison and measurement on a single channel.

[0018] Compared with the prior art, the present application has at least the following advantages or beneficial effects:

[0019] This application proposes a method for comparing and measuring an automatic acquisition device, provides a specific method for manual and automatic comparison and measurement, improves the rationality and accuracy of the comparison and measurement results, and facilitates the comparison and measurement personnel to quickly obtain the comparison and measurement results.

[0020] This application constructs a comparison and measurement system for an automatic acquisition device, considers the characteristics of the internal environment without public network in projects such as hydropower stations and dams, the cumbersome wiring process during the comparison and measurement, and the poor real-time performance of the comparison and measurement. It establishes a wireless communication network mode with an intelligent terminal as the host and an automatic acquisition device and a reading instrument as slaves, realizing portable manual-automatic comparison and measurement and data interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of this application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a structural block diagram of an embodiment of a comparison and measurement system for an automatic acquisition device of this application;

[0023] Figure 2 It is a structural schematic diagram of a comparison and measurement switching module in an embodiment of a comparison and measurement system for an automatic acquisition device of this application;

[0024] Figure 3 It is a schematic diagram of the communication network structure in an embodiment of a comparison and measurement system for an automatic acquisition device of this application;

[0025] Figure 4 It is a schematic diagram of the function menu interface of the comparison and measurement APP in a comparison and measurement system for an automatic acquisition device of this application;

[0026] Figure 5 It is a schematic diagram of the main interface of the compatible comparison and measurement mode of the comparison and measurement APP in a comparison and measurement system for an automatic acquisition device of this application;

[0027] Figure 6 It is a schematic diagram of the main interface of the automatic comparison and measurement mode of the comparison and measurement APP in a comparison and measurement system for an automatic acquisition device of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Usually, the components of the embodiments of this application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present application. Without conflict, the following various embodiments and the various features in the embodiments can be combined with each other.

[0030] Embodiment

[0031] Through long-term research and practice, the inventors found that in the prior art, more research has been conducted on the comparison measurement method, while less research has been done on the comparison measurement technical means. In terms of the research on the comparison measurement method, Hua Shengqiang et al. emphasized the importance of real-time comparison measurement and proposed that the artificial and automated comparison measurement data samples need to be aligned in advance based on time series to improve the rationality of the comparison measurement; Lu Zhengchao et al. pointed out the defects of the variance analysis method and suggested using the accuracy index method for quantitative assessment of artificial comparison measurement; Bian Chao et al. analyzed the feasibility issues of obtaining artificial and automated same-time series measurement times and multi-sequence measurement readings in actual operation of the new standard, as well as the rationality of the formula. In terms of the comparison measurement technical means, the dam monitoring data acquisition device developed by Zhang Xin et al. improved the efficiency of the comparison measurement process by designing a multi-channel mixed connection mode for the automated device of the artificial comparison measurement interface, but it lacked in terms of the real-time performance of the comparison measurement and the convenience of data analysis. It can be seen that the current artificial comparison measurement method puts forward requirements in terms of the real-time performance of the comparison measurement, the feasibility of operation, and the rationality of judgment, while the comparison measurement technical means need to be further improved in terms of the efficiency and real-time performance of the comparison measurement.

[0032] In view of this, the embodiments of the present application provide a comparison measurement method for an automatic acquisition device, which can greatly improve the efficiency and rationality of the comparison measurement result. A comparison measurement method for an automatic acquisition device includes the following steps:

[0033] S101: Obtain the measured value sequences χ zi and χ ri of the automatic acquisition device and the reading instrument for n measurement times at the same time period for the points to be measured, where n is a natural number greater than or equal to 3;

[0034] In this step, for the sake of easy understanding, the automatic acquisition device is a monitoring device installed at a fixed position for collecting measured values of the points to be measured, such as measured values like frequency and temperature. The measured values can also be understood as parameters. The reading instrument is a secondary instrument that has passed verification. With the development of technology, the safety monitoring system of reservoir dams no longer relies on traditional manual timing observations. This method is not only inefficient but may also lead to inaccurate or missing data due to human factors. Currently, the safety monitoring system is gradually turning towards high-frequency automated monitoring, which means that the monitoring equipment can continuously and uninterruptedly collect data automatically, greatly improving the real-time performance and efficiency of monitoring. However, this transformation also brings new challenges. Due to the significant increase in the real-time performance and data volume of monitoring data, various aspects such as the performance of monitoring instruments, the stability of automatic acquisition equipment, and the environmental conditions of system operation may affect the reliability of the data. Therefore, how to ensure that the data collected under high-frequency automated monitoring is still accurate and reliable has become an urgent problem to be solved. To evaluate the reliability of the measured values of the automatic acquisition device for dam safety monitoring, generally, a secondary instrument such as a reading instrument that has passed verification is used to take manual measured values, and these measured values are used as standards to compare with the automated measured values of the automated equipment at the same moment (within a time difference of 20 s) and under the same conditions. By comparing the differences between the two, the accuracy and reliability of the measured values of the automated equipment can be evaluated. The measurement frequency is the number of measurements. Generally, multiple measurements are required to obtain accurate data. For example, if the measuring point is a vibrating wire instrument, the vibrating wire instrument needs to be measured. According to the characteristics of conventional vibrating wire instruments, there are two measured values, namely frequency and temperature. Therefore, frequency and temperature are used as parameters to evaluate the measurement accuracy of this measuring point. For the measuring points of vibrating wire type instruments, automated measurements and manual measurements are carried out within the same time (within a time difference of 20 s), and the measurement frequency is 3 - 7 times. Thus, a set of frequency measured value sequences f zi and f ri , a set of temperature measured value sequences T zi and T ri .

[0035] S102: Take the median values χ zi and χ ri of the measured value sequences χ z and χ r ;

[0036] In this step, still taking the measured values as frequency and temperature as an example, respectively obtain the median values (for an even-numbered measurement frequency sequence, take the average of the two median values) of the frequency measured value sequences f zi and f ri , and the temperature measured value sequences T zi and T ri , which are f z and f r , T z and T r .

[0037] S103: Calculate δ according to the following formula χ as the deviation between the automated measurement value and the manual measurement value of the point to be measured;

[0038] δ χ = χ z - χ r ;

[0039] In this step, still taking the measured values of frequency and temperature as examples, calculate δ according to the following formula f and δ T as the frequency deviation and temperature deviation between the automated and manual measurements at this measuring point. δ f = f z - f r ; δ T = T z - T r .

[0040] S104: Obtain the measurement accuracies of the automatic acquisition device and the reading instrument as σ χz 、σ χr ;

[0041] In this step, still taking the measured values of frequency and temperature as examples, according to the instructions of the automatic acquisition device and the reading instrument or the data provided by the manufacturer, obtain the accuracies of these two devices for frequency measurement and temperature measurement. The measurement accuracy of the automatic device is σ fz 、σ Tz , and the measurement accuracy of the manual reading instrument is σ fr 、σ Tr . For example, for a certain manufacturer, the measurement accuracy of the vibrating wire acquisition module of the automatic device is ±0.5 Hz, ±0.5 °C, the frequency measurement accuracy of the manual reading instrument is ±0.2 Hz, and the temperature measurement accuracy is ±0.2 °C. Then the corresponding σ fz = 0.5 Hz, σ Tz = 0.5 °C, σ fr = 0.2 Hz, σ Tr = 0.2 °C.

[0042] S105: Set the range coefficient C according to the different numbers of measurement times in the comparison measurement data sequence;

[0043] In this step, still taking the measured values of frequency and temperature as examples, set the range coefficient C according to the different numbers of measurement times in the comparison measurement data sequence.

[0044] Measurement sequence 3 4 5 6 7 C 1.69 2.06 2.33 2.53 2.70

[0045] S106: According to the following formula, calculate the standard deviations of χ zi and χ ri in the measured value sequence of the point to be measured as eχz and e χr ,

[0046]

[0047] In this step, taking the measured values of frequency and temperature as examples, according to the following formula, the standard deviations of f in the measured frequency value sequence of the measuring point are obtained respectively zi and f ri are e fz and e fr , and the standard deviations of the measured temperature value sequence T of the measuring point are obtained respectively zi and T ri are e Tz and

[0048] S107: Calculate the measurement limit difference σ of the comparison measurement according to the following formula χ ;

[0049]

[0050] In this step, taking the measured values of frequency and temperature as examples, according to the following formula, calculate the frequency measurement limit difference σ of the comparison measurement f and the temperature measurement limit difference σ T .

[0051] S108: Evaluate the comparison measurement result of the measurement point to be measured according to the inequality δ χ ≤2σ χ If the inequality requirement is met, the manual comparison measurement of the measured value of the corresponding measurement point to be measured is marked as qualified, otherwise it is unqualified.

[0052] In this step, taking the measured values of frequency and temperature as examples, according to δ f ≤2σ f and δ T ≤2σ T Evaluate the comparison measurement result of the measurement point. If the inequality requirement is met, the manual comparison measurement item of the frequency measured value or temperature measured value of the corresponding measurement point is evaluated as qualified, otherwise it is unqualified. It should be noted that: when performing the comparison measurement, the automatic and manual comparison measurement data of the measurement point are all valid measured values, and there is no missing measured value or the measured value exceeding the instrument range for each measurement. The automatic and manual comparison measurement data of the measurement point are both relatively stable, and the short-term measured value stability of each meets the relevant requirements.

[0053] The inventor also found that the following problems still exist in the prior art when performing manual comparison measurement:

[0054] (1) The monitoring instrument is connected to the automatic data collection device through the wiring terminal. The comparison process often requires plugging and unplugging the port, which is not only time-consuming and labor-intensive, but also affects the stability of the port. (2) During the comparison test, the time interval between the automated and manual measurement data is too long, making it difficult to measure the values ​​at similar times, which affects the credibility of the comparison conclusion; (3) After the comparison test, the comparison data needs to be calculated, analyzed and compiled. The amount of data calculation and analysis is large, and the professional skills required of the comparison test personnel are relatively high.

[0055] In view of this, an embodiment of the present invention further provides an automatic data collection device comparison system, including an automatic data collection device, a reader and an intelligent terminal. Figure 3 , the intelligent terminal, automatic acquisition device, and reader constitute a communication network structure of one master and two slaves. The intelligent terminal is the client, and as the host, it sends various instructions to the slave. The MCU and reader are independent servers. As slaves, they do not actively send data, but always wait for instructions from the host to trigger the execution of the corresponding processing subroutine. The structure of the automatic acquisition device, reader, and intelligent terminal is described in detail below.

[0056] The automatic acquisition device is configured to: receive a channel number switching instruction and switch to a corresponding channel; receive a mode query and switching instruction, query the channel mode, and switch the channel to a corresponding measurement mode; receive a data acquisition and sending instruction, and according to a predetermined number of measurements, collect data for the channel for a corresponding number of times under the mode, and send multiple acquisition results to an intelligent terminal; receive a comparison measurement switching instruction and connect the channel to a comparison measurement port.

[0057] Please refer to Figure 1 , the automatic collection device includes:

[0058] A multi-channel acquisition port is configured to connect with each monitoring instrument to establish a channel for data transmission;

[0059] Specifically, each monitoring instrument is connected to a multi-channel acquisition port to form a multi-channel signal.

[0060] The channel switching module is configured to receive a channel number switching instruction and switch to a corresponding channel;

[0061] Specifically, when performing manual comparison measurements in the prior art, monitoring instruments usually need to be connected to an automatic acquisition device through a terminal block. This connection method often requires frequent plugging and unplugging of ports during the comparison measurement process to switch between manual measurement and automated measurement. First, frequent plugging and unplugging operations not only consume a large amount of time and manpower, but also increase the complexity of the operation. Second, such operations may also have an adverse impact on the stability of the ports, and may cause the ports to become loose or damaged over time, thus affecting the accuracy and stability of the data. In this embodiment, through the mutual cooperation of the multi-channel acquisition port and the channel switching module, operations can be performed on the intelligent terminal without plugging and unplugging. For example, if it is necessary to measure Monitoring Instrument 1, the channel switching module makes the multi-channel acquisition port only connected to Monitoring Instrument 1. The effect of such a setting is that during the comparison measurement process, it is not necessary to plug and unplug the ports to establish a connection with the corresponding monitoring instrument.

[0062] A comparison measurement switching module, configured to receive a comparison measurement switching instruction and conduct the channel to the inside or the comparison measurement port;

[0063] Specifically, during the comparison measurement process in the prior art, since it is manual connection of the automatic acquisition device and the reading instrument for measurement, there is often a long time interval between the data obtained from automated measurement and manual measurement. This means that the two measurements are not carried out at the same time point or close time points. Due to the long time interval, environmental conditions (such as temperature, humidity, load, etc.) may have changed, resulting in a large difference between the data of automated measurement and manual measurement. This difference will directly affect the credibility of the comparison measurement results, making it difficult for the comparison measurement results to accurately reflect the true differences between the two measurement methods. In this embodiment, by setting a comparison measurement switching module, when receiving a comparison measurement switching instruction, according to the comparison measurement switching instruction, the measurement loop is conducted to the inside or the comparison measurement port for a binary choice, so as to form a path with the inside or the reading instrument. The data interval between automated measurement and manual measurement is short, which improves the credibility of the comparison measurement results.

[0064] A first channel multiplexing module, configured to select channels according to a preset gating logic;

[0065] Specifically, when the comparison measurement switching module conducts the channel to the first channel multiplexing module, a path is formed with the comparison measurement switching module.

[0066] A first signal acquisition module, configured to perform corresponding times of acquisition on the channel in this mode according to the previously determined measurement times;

[0067] Specifically, in order to obtain more reliable comparison measurement results, the measurement times are generally multiple times. In this embodiment, the measurement times are 3 - 7 times. For example, if the measurement times are 3, the first signal acquisition module performs 3 times of acquisition on the data transmitted by the first channel multiplexing module, and after the acquisition is completed, the data is sent to the first processor.

[0068] A first processor, configured to process the collected data;

[0069] A first communication module, configured to send the processing result to the intelligent terminal.

[0070] Specifically, the first communication module is connected wirelessly. For example, when the wireless connection is made via Bluetooth, the communication module is centered around a BLE communication chip, supports a one-to-many communication mode, and can be Bluetooth-connected to the intelligent terminal together with other communication modules to transmit data.

[0071] In some embodiments of the present invention, the comparison switching module includes three groups of double-pole double-throw relay circuits connected to each other. The input end of the relay circuit is connected to the first processor, and the output end is connected to the first channel multiplexing module or the comparison port. The first processor is used to control the high and low levels of the pins of the connected Darlington tube, thereby driving and controlling the ch1 level of the relay circuit to select the monitoring instrument signal to the first channel multiplexing module or the comparison port.

[0072] Please refer to Figure 2 , the double-pole double-throw relay is connected to the first processor through the pin ch1. The first processor can drive and control the ch1 level by controlling the high and low levels of the pins of the connected Darlington tube, so as to realize the selection of the monitoring instrument signal to the first channel multiplexing module or the comparison port. For example, a low level conducts the first channel multiplexing module, and a high level conducts the comparison port. Or a low level conducts the comparison port, and a high level conducts the first channel multiplexing module.

[0073] A reader, configured to: receive a mode switching service instruction, obtain the mode of the current channel of the automatic acquisition device, receive and issue a mode switching instruction; receive a data sending service instruction, and send the measurement data of the corresponding measurement times collected in real time to the intelligent terminal;

[0074] Please refer to Figure 1 , the reader includes:

[0075] A measurement port, used to establish a communication connection with the comparison port;

[0076] A second channel multiplexing module, configured to select channels according to a preset gating logic;

[0077] Specifically, when the comparison switching module conducts the channel to the comparison port, a path is formed with the comparison switching module, thereby obtaining the data of the monitoring instrument.

[0078] A second signal acquisition module, configured to perform corresponding number of acquisitions on this channel in this mode according to the pre-determined measurement times;

[0079] Specifically, for example, if the measurement frequency is 2, the second signal acquisition module acquires the data transmitted by the second channel multiplexing module twice, and after the acquisition, sends the data to the second processor.

[0080] The second processor is configured to process the acquired data, receive a mode switching service instruction, obtain the mode of the current channel of the automatic acquisition device, and receive and issue a mode switching instruction.

[0081] Specifically, it can receive the mode switching instruction issued by the intelligent terminal, switch to the compatible comparison measurement mode or the full-automatic comparison measurement mode according to the mode switching instruction, and issue the mode switching instruction to the automatic acquisition device. In this way, not only can the intelligent terminal issue the mode switching instruction to the automatic acquisition device, but also the mode switching instruction can be issued to the automatic acquisition device by operating the reading instrument.

[0082] The display module visually displays the processing result.

[0083] The second communication module is configured to send the processing result to the intelligent terminal.

[0084] Specifically, the second communication module is connected wirelessly. For example, when the wireless connection is made via Bluetooth, the communication module is centered on a BLE communication chip, supports a one-to-many communication mode, and can be Bluetooth-connected to the intelligent terminal together with other communication modules to transmit data.

[0085] The intelligent terminal has a built-in comparison measurement APP and is configured to: issue instructions to the automatic acquisition device or / and the reading instrument; and receive data, process the data using the above-mentioned automatic acquisition device comparison measurement method, and perform visual display.

[0086] Please refer to Figure 1 , the intelligent terminal includes:

[0087] The third communication module is configured to receive the data of the automatic acquisition device and the reading instrument.

[0088] The data processing module is configured to process the received data.

[0089] Specifically, for example, the data is processed by the above-mentioned automatic acquisition device comparison method. In the prior art, after the comparison is completed, the collected automated and manual measurement data need to be calculated, analyzed and compiled. This is a complex and tedious process that requires the processing of a large amount of data. The workload of data calculation and analysis is large, and it requires a lot of time and human resources; secondly, this process requires high professional skills from the comparison personnel, who need to have a solid mathematical foundation, data processing capabilities and analysis capabilities. If the professional skills of the comparison personnel are insufficient, deviations or errors may occur in the data analysis results, thereby affecting the accuracy and reliability of the comparison conclusions. This embodiment provides a data processing module that can use the automatic acquisition device comparison method to process data, saving time and manpower. The professional requirements for comparison personnel are not high.

[0090] The display and interaction module is configured to display the processing results, detect the user's operation and generate instructions to the automatic collection device and / or the reader;

[0091] For details, please refer to Figure 4 , Figure 4 This is a schematic diagram of the function menu interface of the comparison test APP in the automatic data acquisition device comparison test system; the interface lists the contents of various function menus in a tiled manner with control grid blocks, including channel operation, channel comparison test (compatible comparison test), automated comparison test, manual measurement and reading, data query and user information viewing functions. It should be noted that this is only part of the function menu of the comparison test APP. When the user clicks on the channel operation, the corresponding channel (monitoring instrument) can be selected to generate a channel number switching instruction. When the user clicks on the channel comparison test, it enters the compatible comparison test mode. When the user clicks on the automated comparison test, it enters the fully automatic comparison test mode. When the user clicks on the manual measurement and reading, the user is allowed to manually measure and read the data. When the user clicks on the data query, he can select the data to be queried.

[0092] A storage module, configured to store data;

[0093] The comparison report generating module is configured to generate a comparison report according to the processing result.

[0094] In some embodiments of the present invention, the modes of the channel include a compatible comparison measurement mode and a fully automatic comparison measurement mode;

[0095] For details, please refer to Figure 5 When the compatible comparison test mode is selected, the comparison test APP is only connected to the automatic acquisition device. The user issues a channel number switching command through the comparison test APP to control the automatic acquisition device to switch to the corresponding channel, perform one online acquisition and display the data on the comparison test APP interface, and then the comparison test APP controls the channel to switch to the comparison test port to wait for the measurement of the reader; please refer to Figure 6When the full-automatic comparison measurement mode is selected, the comparison measurement APP is connected to the automatic acquisition device and the reading instrument. The user selects the measurement times through the comparison measurement APP. During the comparison measurement, the comparison measurement APP controls the automatic acquisition device to perform the measurement readings of the automatic acquisition device and the reading instrument in sequence according to the channel order, and the measured values of each measurement time are displayed in real time. The comparison measurement method of the automatic acquisition device is used to automatically calculate each measured value and output the comparison measurement result; and when the comparison measurement of all channels of the automatic acquisition device is completed, the channels that need to be re-measured are determined according to the comparison measurement result, and the single channel is re-measured. In the full-automatic comparison measurement mode, click "Export to Excel", and the comparison measurement data, parameter calculation results and evaluation results can be integrated and exported in one click in the form of Excel through the generated comparison measurement report module.

[0096] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A method for comparing measurements of an automatic acquisition device, characterized in that, Including: Obtain the measured value sequences of the automatic acquisition device and the reading instrument for n measurement times at the point to be measured during the same time period and where n is a natural number greater than or equal to 2; take the measured value sequences and of the median and ; calculate according to the following formula as the measured value deviation between the automation and manual measurement of the point to be measured; ; The measurement accuracies of the automatic acquisition device and the reading instrument are respectively ; according to the different measurement times of the comparison measurement data sequence, set the range coefficient C; according to the following formula, respectively obtain the standard deviations of and in the measured value sequence of the point to be measured as and , According to the following formula, calculate the measurement limit difference of the comparison measurement ; ; according to the inequality Evaluate the comparison measurement results of the points to be measured. If the inequality requirements are met, the manual comparison measurement of the measured values of the corresponding points to be measured is marked as qualified, otherwise it is unqualified.

2. The method according to claim 1, characterized in that, The measured values include frequency or / and temperature.

3. The method according to claim 2, wherein The measured values are frequency and temperature, and the number of measurements is 3 - 7 times, forming a set of frequency measurement value sequences and and a set of temperature measurement value sequences and ; respectively obtain the median values of each measurement value sequence, which are and , and ; obtain as the frequency deviation and temperature deviation between the automated and manual measurements at this measuring point; According to the instruction manuals of the automatic acquisition device and the reading instrument, obtain the accuracies of the frequency measurement and temperature measurement of the automatic acquisition device and the reading instrument. Let the measurement accuracy of the automatic acquisition device be , and the measurement accuracy of the reading instrument be ; set the range coefficient C according to the different numbers of measurements in the comparison measurement data sequence When the number of measurements is 3, the range coefficient C is 1.69; when the number of measurements is 4, the range coefficient C is 2.06; when the number of measurements is 5, the range coefficient C is 2.33; when the number of measurements is 6, the range coefficient C is 2.53; when the number of measurements is 7, the range coefficient C is 2.70; According to the following formula, respectively obtain the standard deviation within the measured value sequence of the measuring point frequency as and . Respectively obtain the standard deviations and of the measured value sequences of the measuring point temperature and ; ; ; According to the following formula, calculate the limit error of frequency measurement and the limit error of temperature measurement for the comparison measurement; According to the inequality evaluate the comparison measurement results of the measured points to be measured; if the inequality requirements are met, the manual comparison measurement items of the frequency measured value or temperature measured value of the corresponding measured points to be measured are evaluated as qualified, otherwise they are unqualified.

4. An automatic acquisition device comparison measurement system, characterized in that, Including An automatic acquisition device, configured to: receive a channel number switching instruction and switch to the corresponding channel; Receive a mode query and switching instruction, query the mode of the channel, and switch the channel to the corresponding measurement mode; receive a data acquisition and sending instruction, and according to the previously determined number of measurements, perform the corresponding number of acquisitions on this channel in this mode, and send multiple acquisition results to the intelligent terminal; receive a comparison measurement switching instruction and conduct the channel to the comparison measurement port; A reading instrument, configured to: receive a mode switching service instruction, obtain the mode of the current channel of the automatic acquisition device, receive and issue a mode switching instruction; receive a data sending service instruction and send the measurement data of the corresponding number of measurements collected in real time to the intelligent terminal; An intelligent terminal with a built-in comparison measurement APP, configured to: issue instructions to the automatic acquisition device or / and the reading instrument; And receive data, process the data by using the method described in any one of claims 1-3 and perform visual display; The intelligent terminal communicates with the automatic acquisition device and the reading instrument wirelessly, and the wireless communication methods include WiFi and Bluetooth.

5. The system according to claim 4, characterized in that, The automatic acquisition device includes A multi-channel acquisition port, configured to be connected to each monitoring instrument to establish a channel for data transmission; A channel switching module, configured to receive a channel number switching instruction and switch to the corresponding channel; A comparison measurement switching module, configured to receive a comparison measurement switching instruction and conduct this channel to the internal or comparison measurement port; A first channel multiplexing module, configured to select channels according to a preset gating logic; A first signal acquisition module, configured to perform the corresponding number of acquisitions on this channel in this mode according to the previously determined number of measurements; A first processor, configured to process the acquired data; A first communication module, configured to send the processing result to the intelligent terminal wirelessly.

6. The system according to claim 5, characterized in that, The comparison measurement switching module includes 3 groups of double-pole double-throw relay circuits connected to each other. The input end of the relay circuit is connected to the first processor, and the output end is connected to the first channel multiplexing module or the comparison measurement port. The first processor is used to control the high and low levels of the pins of the connected Darlington tube, so as to drive and control the ch1 level of the relay circuit to select the monitoring instrument signal to the first channel multiplexing module or the comparison measurement port.

7. The system according to claim 4, wherein The reading instrument includes: A measurement port, used to establish a communication connection with the comparison measurement port; A second channel multiplexing module, configured to select channels according to a preset gating logic; A second signal acquisition module, configured to perform the corresponding number of acquisitions on this channel in this mode according to the previously determined number of measurements; A second processor, configured to process the acquired data, and receive a mode switching service instruction, obtain the mode of the current channel of the automatic acquisition device, receive and issue a mode switching instruction; A display module, which visually displays the processing result; A second communication module, configured to wirelessly send the processing result to the intelligent terminal.

8. The system according to claim 4, characterized in that, The intelligent terminal includes: A third communication module, configured to receive data from the automatic acquisition device and the reader; A data processing module, configured to process the received data; A display and interaction module, configured to display the processing result, and detect the user's operation and generate instructions to be sent to the automatic acquisition device or / and the reader; A storage module, configured to store the data; A ratio measurement report generation module, configured to generate a ratio measurement report according to the processing result.

9. The system according to claim 4, wherein The mode of the channel includes a compatible ratio measurement mode and a full-automatic ratio measurement mode; When the compatible ratio measurement mode is selected, the ratio measurement APP is only connected to the automatic acquisition device. The user issues a channel number switching instruction through the ratio measurement APP to control the automatic acquisition device to switch to the corresponding channel, perform one online acquisition and display the data on the ratio measurement APP interface. Subsequently, the ratio measurement APP controls the channel to switch to the ratio measurement port and waits for the measurement of the reader; When the full-automatic ratio measurement mode is selected, the ratio measurement APP is connected to the automatic acquisition device and the reader. The user selects the measurement times through the ratio measurement APP. During the ratio measurement, the ratio measurement APP controls the automatic acquisition device to perform automatic acquisition device measurement and reader measurement in sequence according to the channel order, displays the measured values of each measurement time in real time, automatically calculates each measured value by using the method according to any one of claims 1-3, and outputs the ratio measurement result; And after all channels of the automatic acquisition device are subjected to ratio measurement, determine the channels that need to be re-measured according to the ratio measurement result, and perform re-ratio measurement for a single channel.

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