Automatic acquisition device comparison and measurement method and system

Abstract

The invention provides an automatic acquisition device comparison measurement method and system, and relates to the field of evaluation, identification and monitoring of automatic measurement reliability. The method comprises the following steps: acquiring measured value sequences xzi and xri of a point to be measured for n times by an automatic acquisition device and a reading instrument in the same time period, and taking intermediate values xz and xr of the measured value sequences xzi and xri; taking delta chi as the measured value deviation of automatic and manual measurement of the point to be measured, and calculating the measured value measurement tolerance sigma chi of comparison measurement; and evaluating the comparison result of the point to be measured according to the inequality that delta x is less than or equal to 2 sigma x. The system comprises an automatic acquisition device, a reading instrument and an intelligent terminal. According to the method and the system, the rationality and the accuracy of the comparison test result are improved, and the efficiency of comparison test work is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of evaluating and identifying the reliability of automated measurements for safety monitoring, and more specifically, to a method and system for comparing and testing automatic data acquisition devices. Background Art

[0002] At present, automated monitoring is becoming more and more popular. For example, the automation of hydropower station dam safety monitoring. When the reservoir dam safety monitoring system abandons the traditional low-frequency manual observation method and turns to high-frequency automated monitoring methods, although the real-time monitoring is greatly improved, the reliability of monitoring data is constantly tested by many factors such as monitoring instrument performance, automatic data collection device performance, and system operating environment. Therefore, how to evaluate and identify the measurement reliability of automatic data collection devices has become a new problem.

[0003] Manual comparison is an important means to evaluate the reliability of the measurement value of the automatic data acquisition device. The specific method is to use the manual measurement value of the qualified secondary instrument such as the reading instrument as the standard, and compare the automatic measurement value of each channel access instrument of the automatic data acquisition device under the same time period and conditions. Manual comparison takes into account the unbalanced factors such as the performance of the monitoring instrument and the operating environment, and can more objectively reflect the measurement accuracy of the automation system. However, there are the following problems in practice:

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

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

[0006] This application is implemented as follows:

[0007] In a first aspect, the present application provides a method for comparing automatic acquisition devices, comprising: obtaining a measurement value sequence x of n measurements performed by an automatic acquisition device and a reader at a point to be measured in the same time period. zi and χ ri , where n is a natural number greater than or equal to 2; take the measured value sequence χ zi and χ ri The median value of χ z and χ r ; Calculate δ according to the following formula χ As the measured value deviation between the automated and manual measurement of the measured point; δ χ = x z -x r ; The measurement accuracy of the automatic acquisition device and the reading instrument are σ χz , σ χr; According to the different times of the comparison data sequence, set the range coefficient C; According to the following formula, calculate the range coefficient C of the measured value sequence of the measured point zi and χ ri The standard deviation of χz and e χr , According to the following formula, calculate the measurement limit error σ of the comparative measurement value χ ; According to the inequality δ χ ≤2σ χ Evaluate the comparison results of the points to be measured. If they meet the inequality requirements, the manual comparison of the measured values ​​of the corresponding points to be measured is marked as qualified, otherwise it is unqualified.

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

[0009] Based on the first aspect, the measured values ​​are frequency and temperature, and the number of measurements is 3-7 times, forming a set of frequency measurement sequence f zi and f ri and a set of temperature measurement sequence T zi and T ri ; respectively find the middle value of each measurement sequence, which are f z and f r , T z and T r ; Calculate δ according to the following formula f and δ T As the frequency deviation and temperature deviation of the automatic and manual measurement of the measuring point; δ f =f z -f r ; δ T =T z -T r According to the manual of the automatic acquisition device and the reader, obtain the accuracy of the frequency measurement and temperature measurement of the automatic acquisition device and the reader, and let the measurement accuracy of the automatic acquisition device be σ fz , σ Tz , the measurement accuracy of the reading instrument is σ fr , σ Tr ; According to the different measurement times of the comparison data sequence, the range coefficient C is set; when the measurement times is 3, the range coefficient C is 1.69; when the measurement times is 4, the range coefficient C is 2.06; when the measurement times is 5, the range coefficient C is 2.33; when the measurement times is 6, the range coefficient C is 2.53; when the measurement times is 7, the range coefficient C is 2.70; According to the following formulas, the range coefficient C of the measurement point frequency measurement sequence is calculated respectively. zi and f ri The standard deviation of fz and e fr , respectively obtain the temperature measurement sequence T of the measuring pointzi and T ri The standard deviation of Tz and e Tr ;

[0010]

[0011] According to the following formula, calculate the frequency measurement limit error σ of the comparison measurement f and temperature measurement tolerance σ T ; According to the inequality δ f ≤2σ f and δ T ≤2σ T Evaluate the comparison test results of the test point; if they meet the inequality requirements, the manual comparison test items of the frequency measurement value or temperature measurement value of the corresponding test point are evaluated as qualified, otherwise they are unqualified.

[0012] In the second aspect, the present application provides an automatic acquisition device comparison test system, including: an automatic acquisition device, configured to: receive a channel number switching instruction, switch to a corresponding channel; receive a mode query and switching instruction, query the mode of the channel, and switch the channel to a corresponding measurement mode; receive data acquisition and sending instructions, and according to a predetermined number of measurements, collect the corresponding number of times under the mode for the channel, and send multiple collection results to an intelligent terminal; receive a comparison test switching instruction, and connect the channel to a comparison test port; 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 number of measurements collected in real time to the intelligent terminal; the intelligent terminal, with a built-in comparison test APP, is configured to: issue instructions to the automatic acquisition device or / and the reader; and receive data, process the data using the above-mentioned method and display it visually; the intelligent terminal communicates with the automatic acquisition device and the reader wirelessly, and the wireless communication method includes WiFi and Bluetooth.

[0013] Based on the second aspect, the automatic acquisition device includes a multi-channel acquisition port, which is configured to connect with each monitoring instrument to establish a channel for data transmission; a channel switching module, which is configured to receive a channel number switching instruction and switch to the corresponding channel; a comparison measurement switching module, which is configured to receive a comparison measurement switching instruction and connect the channel to the internal or comparison measurement port; a first channel multiplexing module, which is configured to select the channel according to a preset selection logic; a first signal acquisition module, which is configured to collect the corresponding number of times in this mode for the channel according to a predetermined number of measurements; a first processor, which is configured to process the collected data; and a first communication module, which is configured to send the processing results to the smart terminal.

[0014] Based on the second aspect, 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 pins of the connected Darlington tube, thereby driving the ch1 level of the control relay circuit to select the monitoring instrument signal to the first channel multiplexing module or the comparison port.

[0015] Based on the second aspect, the reader includes: a measurement port for establishing a communication connection with a comparison measurement port; a second channel multiplexing module, configured to select the channel according to a preset selection logic; a second signal acquisition module, configured to collect data for the channel a corresponding number of times under this mode according to a predetermined number of measurements; a second processor, configured to process the collected data, receive mode switching service instructions, obtain the mode of the current channel of the automatic acquisition device, receive and issue mode switching instructions; a display module, which visually displays the processing results; and a second communication module, configured to send the processing results to the smart terminal.

[0016] Based on the second aspect, the intelligent terminal includes: a third communication module, configured to receive data from the automatic collection device and the reader; a data processing module, configured to process the received data; a display and interaction module, configured to display the processing results, as well as detect the user's operations and generate instructions to the automatic collection device and / or the reader; a storage module, configured to store data; and a comparison report generation module, configured to generate a comparison report based on the processing results.

[0017] Based on the second aspect, the channel modes include compatible comparison mode and fully automatic comparison mode; when the compatible comparison mode is selected, the comparison APP is only connected to the automatic acquisition device, and the user issues a channel number switching command through the comparison APP to control the automatic acquisition device to switch to the corresponding channel, perform one online acquisition and display the data on the comparison APP interface, and then the comparison APP controls the channel to switch to the comparison port to wait for the measurement of the reader; when the fully automatic comparison mode is selected, the comparison APP is connected to the automatic acquisition device and the reader, and the user selects the measurement times through the comparison APP. During the comparison, the comparison APP controls the automatic acquisition device to perform automatic acquisition device measurement and reader measurement in sequence according to the channel sequence, and displays the measured values ​​of each measurement time in real time. The automatic acquisition device comparison method is used to automatically calculate each measured value, and the comparison results are output; and when all channels of the automatic acquisition device are compared, the channels that need to be re-measured are determined according to the comparison results, and the single channel is re-compared.

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

[0019] The present application proposes a method for comparing and testing automatic acquisition devices, provides a specific method for manual and automated comparison and testing, increases the rationality and accuracy of the comparison and testing results, and facilitates comparison and testing personnel to quickly obtain comparison and testing results.

[0020] The present application constructs an automatic data acquisition device comparison and measurement system, taking into account the characteristics of the lack of public network environment inside projects such as hydropower stations and dams, the cumbersome wiring of the comparison and measurement process, and the poor real-time performance of the comparison and measurement. A wireless communication network mode is established with an intelligent terminal as the host and automatic data acquisition devices and reading instruments as slaves to achieve convenient manual-automatic comparison and data interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a structural block diagram of an embodiment of an automatic acquisition device comparison and measurement system of the present application;

[0023] Figure 2 This 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 the present application;

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

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

[0026] Figure 5 This is a schematic diagram of the main interface of a compatible comparison mode of a comparison APP in an automatic acquisition device comparison system of the present application;

[0027] Figure 6 This is a schematic diagram of the main interface of the automated comparison mode of the comparison APP in the automatic acquisition device comparison system of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] Example

[0031] After long-term research and practice, the inventors found that there are more studies on comparative measurement methods in the prior art, but fewer studies on comparative measurement technical means. In terms of comparative measurement method research, Hua Shengqiang et al. emphasized the importance of real-time comparative measurement, and proposed that the data samples of manual and automated comparative measurement need to be aligned based on time series in advance to improve the rationality of comparative measurement; Lu Zhengchao et al. pointed out the defects of variance analysis method, and suggested the use of precision index method for manual comparative measurement measurement assessment; Bian Chao et al. analyzed the feasibility of obtaining manual and automated simultaneous sequential measurements and multi-sequence readings in the new standard in actual operation, as well as the rationality of formulas. In terms of comparative measurement technical means, the dam monitoring data acquisition device developed by Zhang Xin et al., by designing a multi-channel hybrid mode, improves the efficiency of the comparative measurement process for automated equipment for manual comparative measurement interfaces, but lacks in the real-time comparison and convenience of data analysis. It can be seen that the current manual comparative measurement method has put forward requirements in terms of real-time comparison, operational feasibility, and rationality of judgment, while the comparative measurement technical means need to be further improved in terms of comparison efficiency and real-time performance.

[0032] In view of this, an embodiment of the present application provides an automatic acquisition device comparison method, which can greatly improve the efficiency and rationality of the comparison result. An automatic acquisition device comparison method includes the following steps:

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

[0034] In this step, for ease of understanding, the automatic acquisition device is a monitoring device installed in a fixed position, which is used to collect the measured values ​​of the measured point, such as frequency, temperature and other measured values. The measured values ​​can also be understood as parameters. The reading instrument is a qualified secondary instrument. With the development of technology, the safety monitoring system of reservoir dams no longer relies on traditional manual timed observations. This method is not only inefficient, but also may cause inaccurate or missing data due to human factors. At present, the safety monitoring system is gradually turning to high-frequency automated monitoring, which means that the monitoring equipment can continuously and uninterruptedly collect data automatically, greatly improving the real-time and efficiency of monitoring. However, this transformation also brings new challenges. Due to the substantial increase in the real-time and data volume of monitoring data, the performance of monitoring instruments, the stability of automatic acquisition equipment, the environmental conditions of system operation and other aspects may affect the reliability of the data. Therefore, how to ensure that the collected data is still accurate and reliable under high-frequency automated monitoring has become an urgent problem to be solved. In order to evaluate the reliability of the measured values ​​of the automatic data collection device for dam safety monitoring, qualified secondary instruments such as reading instruments are generally used for manual measurements, and these measured values ​​are used as standards to compare with the automated measurements of the automated equipment at the same time (within a time difference of 20s) 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 times refer to the number of measurements, and in order to obtain accurate data, the measurements are generally taken multiple times. For example, if the measuring point is a vibrating string instrument, the vibrating string instrument needs to be measured. According to the characteristics of conventional vibrating string instruments, there are two measured values, frequency and temperature. Therefore, frequency and temperature are used to evaluate the parameters of the measurement accuracy of the measuring point. The vibrating string instrument measuring points are measured automatically and manually at the same time (within a time difference of 20s), and the number of measurements is 3-7 times. Therefore, a set of frequency measurement sequence f is formed. zi and f ri , 1 set of temperature measurement sequence T zi and T ri .

[0035] S102: Get the measured value sequence χ zi and χ ri The median value of χ z and χ r ;

[0036] In this step, we still take the measured values ​​as frequency and temperature as an example, and respectively obtain the frequency measured value sequence f zi and f ri , temperature measurement sequence T zi and T ri The middle value of (the average of the two middle values ​​of the even-numbered measurement sequence) is f z and f r , T z and T r .

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

[0038] δ χ = x z -x r ;

[0039] In this step, we still take the measured values ​​as frequency and temperature as an example, and calculate δ according to the following formula f and δ T The frequency deviation and temperature deviation of the automatic-manual measurement of this measurement point. f =f z -f r ; δ T =T z -T r .

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

[0041] In this step, we still take the measured values ​​of frequency and temperature as an example. According to the instructions of the automatic acquisition device and the reader or the information provided by the manufacturer, we obtain the accuracy of the two devices in frequency measurement and temperature measurement. The measurement accuracy of the automatic equipment is σ fz , σ Tz , the measurement accuracy of the manual reading instrument is σ fr , σ Tr For example, the measurement accuracy of the vibrating string acquisition module of a manufacturer's automation equipment is ±0.5Hz, ±0.5℃, the frequency measurement accuracy of the manual reading instrument is ±0.2Hz, and the temperature measurement accuracy is ±0.2℃. Then the corresponding σ fz =0.5Hz,σ Tz =0.5℃、σ fr =0.2Hz,σ Tr =0.2℃.

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

[0043] In this step, we still take the measured values ​​of frequency and temperature as an example, and set the range coefficient C according to the number of measurements of the comparison data sequence.

[0044] Test times 3 4 5 6 7 C 1.69 2.06 2.33 2.53 2.70

[0045] S106: According to the following formula, the x in the measured value sequence of the test point is calculated respectively. zi and χ ri The standard deviation ofχz and e χr ,

[0046]

[0047] In this step, we still take the measured values ​​of frequency and temperature as an example, and calculate the f in the measured value sequence of the measuring point frequency according to the following formulas. zi and f ri The standard deviation of fz and e fr , respectively obtain the temperature measurement sequence T of the measuring point zi and T ri The standard deviation of Tz and

[0048] S107: Calculate the measurement limit error σ of the comparative measurement value according to the following formula: χ ;

[0049]

[0050] In this step, we still take the measured values ​​of frequency and temperature as an example, and calculate the frequency measurement limit error σ of the comparison measurement according to the following formula: f and temperature measurement tolerance σ T .

[0051] S108: According to the inequality δ χ ≤2σ χ Evaluate the comparison results of the points to be measured. If they meet the inequality requirements, the manual comparison of the measured values ​​of the corresponding points to be measured is marked as qualified, otherwise it is unqualified.

[0052] In this step, we still take the measured values ​​of frequency and temperature as an example. According to δ f ≤2σ f and δ T ≤2σ T Evaluate the comparison results of the measuring points. If the inequality requirements are met, the manual comparison items of the frequency measurement value or temperature measurement value of the corresponding measuring point are evaluated as qualified, otherwise they are unqualified. It should be noted that: when conducting comparison measurements, the data of the automatic and manual comparison measurements of the measuring points are all valid values, and there are no missing values ​​or values ​​exceeding the instrument range for each measurement. The data of the automatic and manual comparison measurements of the measuring points are relatively stable, and the stability of their respective short-term measurements meets the relevant requirements.

[0053] The inventors also found that the prior art still has the following problems 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, in the prior art, when performing manual comparison measurement, the monitoring instrument usually needs to be connected to the automatic acquisition device through the wiring terminal. This access method often requires frequent plugging and unplugging of the port during the comparison measurement process to switch between manual measurement and automated measurement. First, frequent plugging and unplugging operations not only consume a lot of time and manpower, but also increase the complexity of the operation; secondly, this operation may also have an adverse effect on the stability of the port, which may cause the port to loosen or be damaged in the long run, thereby affecting the accuracy and stability of the data. This embodiment can be operated on an intelligent terminal through the mutual cooperation of the multi-channel acquisition port and the channel switching module without plugging and unplugging. For example, if monitoring instrument 1 is to be measured, the channel switching module enables the multi-channel acquisition port to be connected only to monitoring instrument 1. The effect of this setting is that the comparison measurement process does not require plugging and unplugging of the port to establish a connection with the corresponding monitoring instrument.

[0062] The comparison measurement switching module is configured to receive the comparison measurement switching instruction and conduct the channel to the internal or comparison measurement port;

[0063] Specifically, in the prior art, during the comparison test, since the automatic acquisition device and the reading instrument are manually connected for measurement, there is often a long time interval between the data obtained by the automatic measurement and the manual measurement. This means that the two are not measured at the same time point or at a similar time point. Due to the long time interval, environmental conditions (such as temperature, humidity, load, etc.) may have sent changes, resulting in a large difference between the data of the automatic measurement and the manual measurement. This difference will directly affect the credibility of the comparison test result, making it difficult for the comparison test result to accurately reflect the real difference between the two measurement methods. This embodiment is provided with a comparison test switching module. When receiving a comparison test switching instruction, the measurement circuit is connected to the internal or comparison test port according to the comparison test switching instruction, and one of the two is selected, thereby forming a path with the internal, or the reading instrument forms a path. The data intervals obtained by the automatic measurement and the manual measurement are short, which improves the credibility of the comparison test result.

[0064] A first channel multiplexing module is configured to gate the channel according to a preset gating logic;

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

[0066] The first signal acquisition module is configured to collect data for the channel for a corresponding number of times in this mode according to a predetermined number of measurements;

[0067] Specifically, in order to obtain a more reliable comparison result, the measurement is generally performed multiple times, and the measurement in this embodiment is 3-7 times. For example, if the measurement is 3 times, the first signal acquisition module collects the data transmitted by the first channel multiplexing module 3 times, and sends the data to the first processor after the collection.

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

[0069] The first communication module is configured to send the processing result to the smart terminal.

[0070] Specifically, the first communication module is connected wirelessly. For example, when the wireless mode is connected via Bluetooth, the communication module uses a BLE communication chip as the core, supports a one-to-many communication mode, and can be connected to the smart terminal via Bluetooth 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 pins of the connected Darlington tube, thereby driving the ch1 level of the control 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 pin high and low of the connected Darlington tube to realize the gating of the monitoring instrument signal to the first channel multiplexing module or the comparison measurement port. For example, a low level turns on the first channel multiplexing module, and a high level turns on the comparison measurement port. Or a low level turns on the comparison measurement port, and a high level turns on the first channel multiplexing module.

[0073] The reader is 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] The measurement port is used to establish a communication connection with the comparison measurement port;

[0076] A second channel multiplexing module is configured to gate the channel according to a preset gating logic;

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

[0078] The second signal acquisition module is configured to collect data for the channel for a corresponding number of times in this mode according to a predetermined number of measurements;

[0079] Specifically, for example, if the number of measurements is 2, the second signal acquisition module acquires the data transmitted from the second channel multiplexing module twice, and sends the data to the second processor after acquisition.

[0080] The second processor is configured to process the collected data, receive a mode switching service instruction, obtain the mode of the current channel of the automatic collection 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 mode or the fully automatic comparison 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 mode switching instruction be issued to the automatic acquisition device through the intelligent terminal, but also the mode switching instruction can be issued to the automatic acquisition device through the operation reader.

[0082] Display module, which visualizes the processing results;

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

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

[0085] The intelligent terminal has a built-in comparison test APP and is configured to: issue instructions to the automatic data acquisition device and / or the reader; and receive data, process the data using the comparison test method of the automatic data acquisition device and display it visually.

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

[0087] A third communication module is configured to receive data from the automatic collection device and the reader;

[0088] A data processing module, 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 fully automatic comparison test mode is selected, the comparison test APP is connected to the automatic acquisition device and the reader. The user selects the test times through the comparison test APP. During the comparison test, the comparison test APP controls the automatic acquisition device to perform automatic acquisition device and reader readings in sequence according to the channel sequence, displays the measured values ​​of each test time in real time, uses the automatic acquisition device comparison test method to automatically calculate each measured value, and outputs the comparison test results; and when all channels of the automatic acquisition device are compared, the channels that need to be retested are determined according to the comparison test results, and the single channel is re-compared. In the fully automatic comparison test mode, click "Export to Excel", and the comparison test data, parameter calculation results, and evaluation results can be compiled and exported in Excel with one click by generating a comparison test report module.

[0096] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for comparing and measuring an automatic acquisition device, characterized in that: include: Obtain the measured value sequence χ of the automatic acquisition device and the reading instrument for n times of measurement at the measured point in the same time period zi and χ ri , where n is a natural number greater than or equal to 2; Take the measured value sequence χ zi and χ ri The median value of χ z and χ r ; Calculate δ according to the following formula χ As the measured value deviation between automated and manual measurement of the measured point; d χ =x z -x r ; The measurement accuracy of the automatic acquisition device and the reading instrument are obtained as σ χz , σ χr ; According to the different times of comparison data series, set the range coefficient C; According to the following formula, the x in the measured value sequence of the measured point is calculated respectively. zi and χ ri The standard deviation of χz and e χr , According to the following formula, calculate the measurement limit error σ of the comparative measurement value χ ; According to the inequality δ χ ≤2σ χ Evaluate the comparison results of the points to be measured. If they meet the inequality requirements, the manual comparison 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 and / or temperature.

3. The method according to claim 2, characterized in that The measured values ​​are frequency and temperature, and the number of measurements is 3-7 times, forming a set of frequency measurement sequence f zi and f ri and a set of temperature measurement sequence T zi and T ri ; Find the middle value of each measured value sequence, respectively, f z and f r , T z and T r ; Calculate δ according to the following formula f and δ T Frequency deviation and temperature deviation as the automated and manual measurements of this measuring point; d f =f z -f r ; δ T =T z -T r ; According to the manual of the automatic acquisition device and the reader, obtain the accuracy of the frequency measurement and temperature measurement of the automatic acquisition device and the reader, and let the measurement accuracy of the automatic acquisition device be σ fz , σ Tz , the measurement accuracy of the reading instrument is σ fr , σ Tr ; According to the different times of comparison data series, set the range coefficient C; 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, we can calculate the frequency value f in the measurement point frequency measurement sequence. zi and f ri The standard deviation of fz and e fr , respectively obtain the temperature measurement sequence T of the measuring point zi and T ri The standard deviation of Tz and e Tr ; According to the following formula, calculate the frequency measurement limit error σ of the comparison measurement f and temperature measurement tolerance σ T ; According to the inequality δ f ≤2σ f and δ T ≤2σ T Evaluate the comparison test results of the test point; if they meet the inequality requirements, the manual comparison test items of the frequency measurement value or temperature measurement value of the corresponding test point are evaluated as qualified, otherwise they are unqualified.

4. An automatic acquisition device comparison system, characterized in that: include The automatic acquisition device is configured to: receive a channel number switching instruction and switch to a corresponding channel; Receive mode query and switching instructions, query the mode of the channel, and switch the channel to the corresponding measurement mode; receive data collection and sending instructions, collect the corresponding number of times in this mode for the channel according to the predetermined number of measurements, and send multiple collection results to the intelligent terminal; receive comparative measurement switching instructions, and connect the channel to the comparative measurement port; The reader is 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; The intelligent terminal, with a built-in comparison test APP, is configured to: issue instructions to the automatic data collection device and / or the reading instrument; and receiving data, processing the data using the method described in any one of claims 1 to 3 and performing visual display; The intelligent terminal communicates with the automatic collection device and the reader 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 connect with each monitoring instrument to establish a channel for data transmission; The channel switching module is configured to receive a channel number switching instruction and switch to a corresponding channel; The comparison measurement switching module is configured to receive the comparison measurement switching instruction and conduct the channel to the internal or comparison measurement port; A first channel multiplexing module is configured to gate the channel according to a preset gating logic; The first signal acquisition module is configured to collect data for the channel for a corresponding number of times in this mode according to a predetermined number of measurements; A first processor is configured to process the collected data; The first communication module is configured to send the processing result to the smart terminal in a wireless manner.

6. The system according to claim 4, characterized in that 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 pin height of the connected Darlington tube, thereby driving the ch1 level of the control relay circuit to select the monitoring instrument signal to the first channel multiplexing module or the comparison port.

7. The system according to claim 4, characterized in that The reader comprises: The measurement port is used to establish a communication connection with the comparison measurement port; A second channel multiplexing module is configured to gate the channel according to a preset gating logic; The second signal acquisition module is configured to collect data for the channel for a corresponding number of times in this mode according to a predetermined number of measurements; The second processor is configured to process the collected data, receive a mode switching service instruction, obtain the mode of the current channel of the automatic collection device, and receive and issue a mode switching instruction; Display module, which visualizes the processing results; The second communication module is configured to send the processing result to the smart terminal in a wireless manner.

8. The system according to claim 4, characterized in that The intelligent terminal comprises: A third communication module is configured to receive data from the automatic collection device and the reader; A data processing module, configured to process the received data; 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; A storage module, configured to store data; The comparison report generating module is configured to generate a comparison report according to the processing result.

9. The system according to claim 4, characterized in that The modes of the channel include a compatible comparison test mode and a fully automatic comparison test mode; 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; When the fully automatic comparison test mode is selected, the comparison test APP is connected to the automatic data acquisition device and the reader, and the user selects the number of measurements through the comparison test APP. During the comparison test, the comparison test APP controls the automatic data acquisition device to perform automatic data acquisition device measurement and reader measurement in sequence according to the channel sequence, and displays the measured values ​​of each measurement in real time. The method described in any one of claims 1 to 3 is used to automatically calculate each measured value, and output the comparison test result; And when all channels of the automatic acquisition device are compared and tested, the channels that need to be retested are determined according to the comparison test results, and the comparison test is re-performed on a single channel.

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