CN1952624A - Automatic verification control system for water flow standard device - Google Patents
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Abstract
本发明提供了一种水流量标准装置自动检定控制系统,由一台计算机和一台PLC联接,PLC完成检定程序的运行、检测数据的采集、技术指标的计算,计算机通过通讯软件直接从PLC中获取数据,利用监控软件制作监控画面,利用监控软件的内嵌VBA与监控软件、VisualBasic软件结合,产生实时的检定记录和建立后台数据库,以及对检定记录的查询和打印。本发明取代了人工逐项填写、计算的传统检定方式,既减少了人为抄写、计算的失误,又提高了检测数据的准确性和权威性,达到了操作简单,控制先进,检定精度高,设备的故障率低的目的。
The invention provides an automatic verification control system for a water flow standard device, which is connected by a computer and a PLC. The PLC completes the operation of the verification program, the collection of detection data, and the calculation of technical indicators. The computer directly reads from the PLC through communication software. Obtain data, use monitoring software to make monitoring screens, use the built-in VBA of monitoring software to combine with monitoring software and VisualBasic software, generate real-time verification records and establish background databases, and query and print verification records. The invention replaces the traditional verification method of manual filling and calculation item by item, which not only reduces the mistakes of human copying and calculation, but also improves the accuracy and authority of the detection data, and achieves simple operation, advanced control, high verification accuracy, and equipment The purpose of low failure rate.
Description
技术领域technical field
本发明涉及一种仪表检定控制系统,尤其是一种水流量标准装置自动检定控制系统。The invention relates to an instrument verification control system, in particular to an automatic verification control system for a water flow standard device.
背景技术Background technique
水流量标准装置是检测液体流量计的标准装置,主要由液体循环系统、试验管路、流量工作标准(称量容器)实验启停设备和控制设备等组成(如图3所示)。其工作原理是:将被检流量计安装到标准装置上,使液体流经被检流量计和流量工作标准(称量容器),同步操作被检流量计和流量工作标准(称量容器),比较两者的输出流量值,从而确定被检流量计的计量准确度和重复性。检定方法主要有静态质量法和体积法,其中静态质量法是在静止状态下称量一段时间内容器中的液体质量,从而计算出流量。按照检定规程的要求,流量计的检定点一般为最大流量的25%、40%、60%、80%、100%五点,检定中的关键数据:一是采集称量一段时间内容器中的液体质量,一是采集被检流量计的流量,并根据检测数据进行大量的繁杂计算和填写检定记录。以前的控制系统为老式继电器、压扣、按钮,所有操作均在控制箱上进行,检定方式为单机控制,检定时手动打开切断阀,靠人为调节流量到一定值后,人工读取流量计的示值,然后测量称量容器中水的高度,换算成体积单位流量,按照检定规程经过大量人工计算后,算出流量计的相对误差、重复性和仪表的系数,检定方法陈旧落后,检测一台流量计,需要多人合作才能完成。更重要的是由于人工操作、读数和计算很容易造成数据不准确、系统的检定精度低,很难保证被检表的精度,无法为生产提供可靠的技术数据,直接影响到产品的质量和企业的经济效益。The water flow standard device is a standard device for testing liquid flow meters, mainly composed of liquid circulation system, test pipeline, flow working standard (weighing container) experimental start-stop equipment and control equipment (as shown in Figure 3). Its working principle is: install the tested flow meter on the standard device, make the liquid flow through the tested flow meter and the flow working standard (weighing container), and synchronously operate the tested flow meter and the flow working standard (weighing container), Compare the output flow values of the two to determine the measurement accuracy and repeatability of the tested flowmeter. The verification methods mainly include static mass method and volume method. The static mass method is to weigh the mass of the liquid in the container for a period of time in a static state to calculate the flow rate. According to the requirements of the verification regulations, the verification points of the flowmeter are generally five points of 25%, 40%, 60%, 80% and 100% of the maximum flow rate. Liquid quality, one is to collect the flow rate of the flow meter to be tested, and perform a large number of complicated calculations and fill in the verification records based on the test data. The previous control system was old-fashioned relays, press buckles, and buttons. All operations were performed on the control box. The verification method was single-machine control. During the verification, the shut-off valve was manually opened, and the flow rate was manually adjusted to a certain value, and the flow meter was manually read. Indicate the value, then measure the height of the water in the weighing container, convert it into volume unit flow, and calculate the relative error, repeatability and instrument coefficient of the flowmeter after a large number of manual calculations according to the verification regulations. The verification method is outdated and backward. The flow meter requires the cooperation of multiple people to complete. More importantly, due to manual operation, reading and calculation, it is easy to cause inaccurate data and low verification accuracy of the system. It is difficult to guarantee the accuracy of the tested meter, and it is impossible to provide reliable technical data for production, which directly affects the quality of products and enterprises. economic benefits.
发明内容Contents of the invention
本发明的目的在于提供一种水流量标准装置自动检定控制系统,使整个检定过程全部由计算机控制,并在检定过程中产生实时数据的检定记录,同时也便于检定记录的查询和打印。The purpose of the present invention is to provide an automatic verification control system for a water flow standard device, so that the entire verification process is completely controlled by a computer, and a verification record of real-time data is generated during the verification process, and it is also convenient for querying and printing of the verification record.
本发明的目的是这样实现的,该水流量标准装置自动检定控制系统主要由一台计算机和一台PLC联接。PLC完成检定程序的运行、检测数据的采集、技术指标的计算;计算机通过通讯软件直接从PLC中获取数据,利用监控软件制作监控画面,利用监控软件的内嵌VBA与监控软件、VisualBasic软件结合,产生实时的检定记录和建立后台数据库,以及对检定记录的查询和打印。The object of the present invention is achieved in that the automatic verification control system of the water flow standard device is mainly connected by a computer and a PLC. The PLC completes the operation of the verification program, the collection of test data, and the calculation of technical indicators; the computer directly obtains data from the PLC through communication software, uses the monitoring software to make monitoring screens, and uses the embedded VBA of the monitoring software to combine with monitoring software and VisualBasic software. Generate real-time verification records and establish a background database, as well as query and print verification records.
由于本发明的上述系统配置,通过检定程序实现了电气控制过程、检测数据的采集、技术指标的计算、检定记录的查询和打印的自动控制,取代了人工逐项填写、计算的传统检定方式。这样即减少人为抄写、计算的失误,又提高了检测数据的准确性和权威性,从而实现了操作简单,控制先进,检定精度高,设备的故障率低的目的。Due to the above-mentioned system configuration of the present invention, the automatic control of the electrical control process, the collection of detection data, the calculation of technical indicators, the query and printing of verification records is realized through the verification program, replacing the traditional verification method of manually filling in and calculating item by item. In this way, the error of human transcription and calculation is reduced, and the accuracy and authority of the detection data are improved, so as to realize the purpose of simple operation, advanced control, high verification accuracy and low failure rate of equipment.
附图说明Description of drawings
图1为本发明的控制系统构成图;Fig. 1 is a control system composition diagram of the present invention;
图2为本发明的检定程序流程图;Fig. 2 is the verification program flowchart of the present invention;
图3为水流量标准装置结构图。Figure 3 is a structural diagram of the water flow standard device.
具体实施方式Detailed ways
下面结合附图对本发明作进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings.
如图1所示,本发明的水流量标准装置自动检定控制系统主要由一台计算机通过RS-232接口与AB-PLC联接。利用RSlogix500软件通过编程使AB-PLC完成检定程序的运行、检测数据的采集、技术指标的计算;计算机通过RSlinx通讯软件直接从PLC中获取数据,利用RSView32监控软件制作方便直观的操作画面、工艺画面、检定记录画面,便于操作和控制。开发工具采用了VisualBasic软件,利用RSView32软件的内嵌VBA与RSView32软件结合,产生实时的检定记录和建立后台数据库,方便对历史记录的查询和打印。As shown in Fig. 1, the automatic verification control system of the water flow standard device of the present invention is mainly connected by a computer with the AB-PLC through the RS-232 interface. Use RSlogix500 software to make AB-PLC complete the operation of the verification program, the collection of detection data, and the calculation of technical indicators through programming; the computer directly obtains data from the PLC through RSlinx communication software, and uses RSView32 monitoring software to create convenient and intuitive operation screens and process screens , Verification record screen, easy to operate and control. The development tool adopts VisualBasic software, and uses the embedded VBA of RSView32 software to combine with RSView32 software to generate real-time verification records and establish a background database, which is convenient for querying and printing of historical records.
如图2所示,检定程序是按照检定规程进行设计的,可分为手动和自动两种。选PC手动,可实现单机操作。选PC自动,起动空压机待空压机的压力达到0.4MPa以上时,按选好的检定线,起动水泵将水抽到水塔上,当水塔的液位达到溢流状态时,由PLC控制打开切断阀,将调节阀的开度调节为最大流量的90%时,运行5分钟,关闭调节阀和切断阀;然后将调节阀的开度依次调节为最大流量的25%、40%、60%、80%、100%的检定点上进行检定;每个检定点要检定三次,在每个检定点上要采集称量一段时间内容器中的液体质量和被检流量计的流量。然后对采集的数据按照检定规程的要求进行有关的计算,根据计算结果判断流量计是否合格。PLC发出产生报表的指令后,启动事件触发功能,当人工输入检定记录编号和事件触发信号都具备时,VBA程序在指定的路径下,调用后台数据库中存放的检定记录的Excel表格,使每检定一点流量计和容器中水的质量称量值、流量计的流量、相对示值误差、仪表系数、重复性以及流量计的相关数据都动态的写入检定记录中,打印检定记录并将检定记录保存在指定的位置。全部检定完成后,关闭调节阀和切断阀,完成流量计的检定。As shown in Figure 2, the verification program is designed according to the verification regulations, which can be divided into manual and automatic. Choose PC manual to realize stand-alone operation. Select PC to be automatic, start the air compressor and wait until the pressure of the air compressor reaches above 0.4MPa, press the selected calibration line, start the water pump to pump water to the water tower, when the liquid level of the water tower reaches the overflow state, it will be controlled by PLC Open the shut-off valve, adjust the opening of the regulating valve to 90% of the maximum flow, run for 5 minutes, close the regulating valve and the shut-off valve; then adjust the opening of the regulating valve to 25%, 40%, 60% of the maximum flow in turn %, 80%, and 100% of the verification points; each verification point shall be verified three times, and at each verification point, the mass of the liquid in the container and the flow rate of the inspected flowmeter shall be collected and weighed for a period of time. Then carry out relevant calculations on the collected data according to the requirements of the verification regulations, and judge whether the flowmeter is qualified according to the calculation results. After the PLC issues the command to generate the report, it starts the event trigger function. When the manual input verification record number and the event trigger signal are available, the VBA program calls the Excel table of the verification record stored in the background database under the specified path, so that each verification record The weighing value of the water in the one-point flowmeter and the container, the flow rate of the flowmeter, the relative indication error, the meter coefficient, the repeatability and the relevant data of the flowmeter are all dynamically written into the verification record, and the verification record is printed and recorded. Save in the specified location. After all the verification is completed, close the regulating valve and shut-off valve to complete the verification of the flowmeter.
如图1、2所示,由于流量计的显示输出为4~20mA模拟量信号,因此我们选用16位的8通道模拟量输入模块1746-NI8采集流量计的流量,得到流量计的实时流量。为确保采集到的流量计的流量准确度,我们在换向阀开阀和关阀的前10秒不采集流量计的流量,而在中间的时间内每隔1秒采一次数,然后取平均值作为流量计的流量。As shown in Figures 1 and 2, since the display output of the flowmeter is a 4-20mA analog signal, we use a 16-bit 8-channel analog input module 1746-NI8 to collect the flow of the flowmeter to obtain the real-time flow of the flowmeter. In order to ensure the accuracy of the flow rate collected by the flowmeter, we do not collect the flow rate of the flowmeter in the first 10 seconds when the reversing valve is opened and closed, but collect the flow rate every 1 second during the middle period, and then take the average value as the flow rate of the flowmeter.
如图1所示,为保证检定精度,采集称量一段时间内容器中的液体质量是利用1747-SN模块和连接在容器上的称重显示仪表实现的。方法是在称重显示仪表上设计了一个RS-232接口,在称重显示仪表中设定好接口、波特率,然后通过通讯电缆联接在PLC的扫描模块上,在扫描模块中进行相应的波特率设定,这样扫描模块就将称重显示仪表的称量值显示在其地址上,PLC到指定的地址中读取称重显示仪表的称量值,完成了容器中水的质量的采集。As shown in Figure 1, in order to ensure the verification accuracy, the collection and weighing of the liquid quality in the container for a period of time is realized by using the 1747-SN module and the weighing display instrument connected to the container. The method is to design an RS-232 interface on the weighing display instrument, set the interface and baud rate in the weighing display instrument, and then connect it to the scanning module of the PLC through the communication cable, and carry out corresponding operations in the scanning module. The baud rate is set, so that the scanning module displays the weighing value of the weighing display instrument on its address, and the PLC reads the weighing value of the weighing display instrument from the specified address, and completes the quality control of the water in the container. collection.
本发明的操作系统采用Windows2000,目的是便于在监控软件中产生报表。The operating system of the present invention adopts Windows2000, and the purpose is to facilitate generating reports in the monitoring software.
本发明的系统配置如下:The system configuration of the present invention is as follows:
本发明的系统配置并非只局限于如上所列的具体设备,也可以采用与如上所列设备性能相近的其它设备进行系统配置。The system configuration of the present invention is not limited to the specific equipment listed above, and other equipment similar in performance to the equipment listed above can also be used for system configuration.
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101294841B (en) * | 2008-04-10 | 2010-06-02 | 上海大学 | Automatic verification device and method for metering tank |
CN103063276A (en) * | 2012-12-27 | 2013-04-24 | 重庆川仪自动化股份有限公司 | Electromagnetic flowmeter verification system |
CN103743455A (en) * | 2013-12-31 | 2014-04-23 | 广西玉柴机器股份有限公司 | Mass flowmeter detecting device and detecting method |
CN104154972A (en) * | 2014-08-01 | 2014-11-19 | 中国计量学院 | Flow calibration facility for ultrasonic water meters |
CN106768207A (en) * | 2017-01-17 | 2017-05-31 | 北京远东仪表有限公司 | A kind of weighing system for water flow device |
CN108254169A (en) * | 2017-12-28 | 2018-07-06 | 珠海昊星自动化系统有限公司 | A kind of venturi air-valve automated testing method and system |
CN112664442A (en) * | 2020-12-24 | 2021-04-16 | 波露明(北京)科技有限公司 | Automatic calibration system and calibration method for metering pump |
CN114325550A (en) * | 2021-11-23 | 2022-04-12 | 云南电网有限责任公司 | Automatic diagnosis system and method for detecting abnormal epitope of assembly line of electric energy meter |
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2005
- 2005-10-20 CN CN 200510047537 patent/CN1952624A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101294841B (en) * | 2008-04-10 | 2010-06-02 | 上海大学 | Automatic verification device and method for metering tank |
CN103063276A (en) * | 2012-12-27 | 2013-04-24 | 重庆川仪自动化股份有限公司 | Electromagnetic flowmeter verification system |
CN103743455A (en) * | 2013-12-31 | 2014-04-23 | 广西玉柴机器股份有限公司 | Mass flowmeter detecting device and detecting method |
CN103743455B (en) * | 2013-12-31 | 2016-06-29 | 广西玉柴机器股份有限公司 | Calibrating apparatus of quality flowmeter and calibration method |
CN104154972A (en) * | 2014-08-01 | 2014-11-19 | 中国计量学院 | Flow calibration facility for ultrasonic water meters |
CN104154972B (en) * | 2014-08-01 | 2017-07-11 | 中国计量学院 | ultrasonic water meter flow standard device |
CN106768207A (en) * | 2017-01-17 | 2017-05-31 | 北京远东仪表有限公司 | A kind of weighing system for water flow device |
CN108254169A (en) * | 2017-12-28 | 2018-07-06 | 珠海昊星自动化系统有限公司 | A kind of venturi air-valve automated testing method and system |
CN112664442A (en) * | 2020-12-24 | 2021-04-16 | 波露明(北京)科技有限公司 | Automatic calibration system and calibration method for metering pump |
CN114325550A (en) * | 2021-11-23 | 2022-04-12 | 云南电网有限责任公司 | Automatic diagnosis system and method for detecting abnormal epitope of assembly line of electric energy meter |
CN114325550B (en) * | 2021-11-23 | 2024-05-10 | 云南电网有限责任公司 | Automatic diagnosis system and method for abnormal meter positions of electric energy meter verification assembly line |
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