CN209354337U - An online energy efficiency test and energy consumption analysis system for a pump system - Google Patents
An online energy efficiency test and energy consumption analysis system for a pump system Download PDFInfo
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Abstract
Description
技术领域technical field
本实用新型涉及自动化检测技术领域，具体为一种泵类系统的在线能效测试和能耗分析系统。The utility model relates to the technical field of automatic detection, in particular to an online energy efficiency test and energy consumption analysis system of a pump system.
背景技术Background technique
目前国外水泵测试系统的产品已经比较成熟，美国、德国等发达国家已经普遍化，并呈现出高集成、小体积、可移动、多功能、设备全、易操作等特点。由于水泵检测技术的发展，矿山用水泵关键参数的检测技术也得到了进步。尽管这类水泵测试装置具有高集成、小体积、可移动、多功能、设备全、易操作等优点，但在数据处理方面功能薄弱，缺少嵌入式的数据处理分析系统，效率不高。国外泵类系统在性能测试技术和自动检测技术方面的研究相对于国内起步较早，测试系统方面的产品已经比较成熟。但是，针对基于PLC技术的泵类系统性能测试技术和自动检测技术，国外没有现成的资料可供参考。随着我国工业生产的不断发展，我国泵类系统性能测试试验台已较多的投入使用，但是针对泵类系统在线能效测试及能耗分析系统的设计与研究并不多。At present, the products of foreign water pump test systems are relatively mature, and have been popularized in developed countries such as the United States and Germany, and show the characteristics of high integration, small size, mobility, multi-function, complete equipment, and easy operation. Due to the development of water pump detection technology, the detection technology of key parameters of mine water pumps has also been improved. Although this type of water pump test device has the advantages of high integration, small size, mobility, multi-function, complete equipment, and easy operation, it has weak functions in data processing, lacks an embedded data processing and analysis system, and is not efficient. The research on performance test technology and automatic detection technology of foreign pump systems started earlier than that in China, and the products of test systems have been relatively mature. However, for the pump system performance test technology and automatic detection technology based on PLC technology, there are no ready-made materials abroad for reference. With the continuous development of my country's industrial production, more test benches for performance testing of pump systems in my country have been put into use, but there are not many designs and researches on online energy efficiency testing and energy consumption analysis systems for pump systems.
目前，对于泵类系统能效测试主要是人工分别对相关参数进行现场进行十几个参数的人工观测抄录，再按国标要求进行查表计算等数据处理，最后得到泵类类系统的性能参数。这种利用人工读数、记录的方法来采集试验数据的方法，需消耗大量的人力和时间，并且有些试验只能持续很短的时间，不允许长时间的测量。在现代的泵类系统测试中，需要测量的参数与测点的数目不断增多，对检测速度与精度的要求也不断提高。因此，常规的测量方法已难以满足要求。At present, the energy efficiency test of the pump system is mainly to manually observe and transcribe more than a dozen parameters on the spot, and then perform data processing such as table lookup and calculation according to the requirements of the national standard, and finally obtain the performance parameters of the pump system. This method of collecting test data by manual reading and recording needs to consume a lot of manpower and time, and some tests can only last for a short time and do not allow long-term measurement. In modern pump system testing, the number of parameters and measuring points to be measured is increasing, and the requirements for detection speed and accuracy are also increasing. Therefore, conventional measurement methods have been difficult to meet the requirements.
随着电子学、传感器和微机技术的迅速发展及其在测试技术中的应用，泵类系统性能参数的检测技术有了新的突破。高精度的流量、压力传感器的问世，可编程控制器(PLC)、单片机(MCU)及微机的广泛应用，为研制开发出准确、快速、智能化的空气泵类系统性能检测仪器提供了可能。这种检测仪器能快速自动地采集试验数据，并对数据进行计算处理，及时提供试验结果，以供试验人员分析和判断，这就大大缩短了实验研究的周期，节省了能源、物力的消耗。With the rapid development of electronics, sensors and microcomputer technology and their application in testing technology, new breakthroughs have been made in the detection technology of performance parameters of pump systems. The advent of high-precision flow and pressure sensors, and the wide application of programmable logic controllers (PLCs), single-chip microcomputers (MCUs) and microcomputers have made it possible to develop accurate, fast, and intelligent performance testing instruments for air pump systems. This testing instrument can quickly and automatically collect test data, calculate and process the data, and provide test results in time for test personnel to analyze and judge, which greatly shortens the cycle of experimental research and saves energy and material consumption.
因此如何利用先进的检测技术，开发出能准确、快速进行空气泵类系统能效参数检测的仪器，已愈来愈受到生产厂家和广大学者的关注。Therefore, how to use advanced detection technology to develop instruments that can accurately and quickly detect energy efficiency parameters of air pump systems has attracted more and more attention from manufacturers and scholars.
实用新型内容Utility model content
为了克服现有技术提及的缺点，本实用新型提供一种泵类系统的在线能效测试和能耗分析系统，达到准确评价泵类系统运行能效、掌握泵类系统运行状态、制定泵类系统节能措施等方面提供科学依据和技术保障。In order to overcome the shortcomings mentioned in the prior art, the utility model provides an online energy efficiency test and energy consumption analysis system of the pump system, so as to accurately evaluate the energy efficiency of the pump system, grasp the operating status of the pump system, and formulate energy-saving measures for the pump system. Measures and other aspects to provide scientific basis and technical support.
本实用新型解决其技术问题所采用技术方案为：一种泵类系统的在线能效测试和能耗分析系统，包括传感器组模块、传感器信号处理模块、显示模块、存储模块、通信模块、主控制器模块和电源转换模块；所述传感器组模块数据连接所述传感器信号处理模块，所述传感器信号处理模块分别数据连接所述主控制器模块、显示模块、存储模块和通信模块，所述主控制器模块分别数据连接所述显示模块、存储模块和通信模块，所述电源转换模块电气连接所述主控制器模块，为主控制器模块和各个模块提供电能。The technical solution adopted by the utility model to solve the technical problem is: an online energy efficiency test and energy consumption analysis system of a pump system, including a sensor group module, a sensor signal processing module, a display module, a storage module, a communication module, and a main controller module and a power conversion module; the sensor group module data is connected to the sensor signal processing module, and the sensor signal processing module is respectively data connected to the main controller module, display module, storage module and communication module, and the main controller The modules are data-connected to the display module, the storage module and the communication module respectively, and the power conversion module is electrically connected to the main controller module to provide power to the main controller module and each module.
进一步的，还包括有备用电源模块，所述备用电源模块电气连接所述电源转换模块，所述备用电源模块采用可充电的24V锂电池，为系统提供电源。Further, it also includes a backup power module, the backup power module is electrically connected to the power conversion module, and the backup power module uses a rechargeable 24V lithium battery to provide power for the system.
进一步的，所述传感器组模块包括电流传感器、电压传感器、(管道)压力传感器、(管道)温度传感器和(管道)流量传感器。其中电流传感器采用钳形电流传感器，量程为0.00mA～1000A，精度为±0.5％FS；(管道)压力传感器量程为-100kPa～0～100Mpa，精度为0.25级；(管道)温度传感器量程为-50～350℃，精度为0.5级；(管道)流量传感器测量管径范围为DN50～700mm。Further, the sensor group module includes a current sensor, a voltage sensor, a (pipeline) pressure sensor, a (pipeline) temperature sensor and a (pipeline) flow sensor. Among them, the current sensor adopts a clamp current sensor with a range of 0.00mA～1000A and an accuracy of ±0.5% FS; the (pipeline) pressure sensor has a range of -100kPa～0～100Mpa and an accuracy of 0.25; the (pipeline) temperature sensor has a range of - 50～350℃, the accuracy is 0.5 grade; the (pipeline) flow sensor measures the diameter range of DN50～700mm.
进一步的，所述传感器信号处理模块包括数据连接的电参数处理模块和高精度A/D转换模块，所述电流传感器和电压传感器数据连接所述电参数处理模块，所述压力传感器、温度传感器和流量传感器数据连接所述高精度A/D转换模块。电参数处理模块采用RS485接口，高精度A/D转换模块共有8组通信，具有24位的精度和30kSPS的数据转换速度。Further, the sensor signal processing module includes a data-connected electrical parameter processing module and a high-precision A/D conversion module, the current sensor and voltage sensor data are connected to the electrical parameter processing module, and the pressure sensor, temperature sensor and The flow sensor data is connected to the high-precision A/D conversion module. The electrical parameter processing module adopts RS485 interface, and the high-precision A/D conversion module has a total of 8 communication groups, with 24-bit precision and 30kSPS data conversion speed.
进一步的，所述显示模块为一块7寸的带触摸功能的显示屏。Further, the display module is a 7-inch display screen with touch function.
进一步的，所述存储模块包括SD卡和U盘两种存储方式，SD卡最大兼容存储容量为8G，U盘则不受限制，主要是存储数据为泵类系统运行数据，包括实时进、出液体流速，实时进、出口压力，实时进、出口温度，实时泵类机组电参数、能耗等信息。Further, the storage module includes two storage methods, SD card and U disk. The maximum compatible storage capacity of SD card is 8G, and the U disk is not limited. The main storage data is the operation data of the pump system, including real-time input and output. Liquid flow rate, real-time inlet and outlet pressure, real-time inlet and outlet temperature, real-time pump unit electrical parameters, energy consumption and other information.
进一步的，所述通信模块采用GPRS无线通信模块或RS232串口模块或以太网网络模块(TCP/IP模块)或以上的结合，其中，GPRS无线通信模块可通过sim卡无线拨号上网方式与远程服务器进行连接通信，进行数据传输；RS232串口模块可使设备通过RS232线或232转USB数据线与服务器连接，进行数据传输；以太网网络模块使设备具有网络通信的功能，通过网线与PC机连接，可以建立通信信道进行数据传输。Further, the communication module adopts a GPRS wireless communication module or a RS232 serial port module or an Ethernet network module (TCP/IP module) or a combination of the above, wherein the GPRS wireless communication module can communicate with a remote server through a sim card wireless dial-up mode Connect communication for data transmission; RS232 serial port module can connect the device to the server through RS232 cable or 232 to USB data cable for data transmission; Ethernet network module enables the device to have the function of network communication. Establish a communication channel for data transmission.
进一步的，所述主控制器模块采用MCU主控板控制芯片，负责所有功能模块的控制、数据的采集处理等功能，主控制芯片通过RS485接口以特定的通信协议(modbus)接发所有功能模块的数据。Further, the main controller module adopts the MCU main control board control chip, which is responsible for functions such as the control of all functional modules, data collection and processing, and the main control chip sends and receives all functional modules with a specific communication protocol (modbus) through the RS485 interface The data.
进一步的，所述电源转换模块包括两种模块：24V转5V电源模块和5V转3V电源模块。其中24V转5V电源模块为U盘提供电源，并作为3.3V电压稳压电路的输入电源；5V转3V电源模块将5V输入电压经过DC-DC的方式输出3V电压，为主系统的控制电路提供电源，最大输出电流可达2A。Further, the power conversion module includes two types of modules: a 24V to 5V power supply module and a 5V to 3V power supply module. Among them, the 24V to 5V power supply module provides power for the U disk and serves as the input power of the 3.3V voltage regulator circuit; the 5V to 3V power supply module outputs the 5V input voltage through DC-DC to provide 3V voltage for the control circuit of the main system. power supply, the maximum output current can reach 2A.
本实用新型的有益效果是：The beneficial effects of the utility model are:
(1)本实用新型可提高泵类系统能效检测效率，保证检测准确性。该集成系统的开发可替代以往泵类系统能效检测采用人工记录模式的方式进行，改变测试方法效率低下的现状。该测试系统可实现泵类系统多参数的同时记录，保证数据采集的同时性和准确性，提高泵类系统能效测试效率。另外，系统还嵌入能耗分析软件，可实时对泵类系统的运行状态进行能效分析，更好掌握其运行效率和能效水平。(1) The utility model can improve the energy efficiency detection efficiency of the pump system and ensure the detection accuracy. The development of this integrated system can replace the manual recording mode of energy efficiency testing of pump systems in the past, and change the current situation of low efficiency of testing methods. The test system can realize the simultaneous recording of multiple parameters of the pump system, ensure the simultaneity and accuracy of data collection, and improve the efficiency of energy efficiency testing of the pump system. In addition, the system is also embedded with energy consumption analysis software, which can conduct energy efficiency analysis on the operating status of the pump system in real time, so as to better grasp its operating efficiency and energy efficiency level.
(2)本实用新型实现泵类系统能效在线检测和能耗分析功能，可及时查找泵类系统运行的缺陷。由于目前泵类系统的能效测试方法均是现场采集数据，再进行离线分析。这样处理所得结果会产生较大的滞后性，当发现测试效率低下时，很难在测试现场就及时查找其存在问题，以便提出合理的解决措施。该系统平台的研发可以实现在线能耗分析，指出运行存在问题，技术人员便可及时发现问题并在现场查找能源浪费之处。(2) The utility model realizes the functions of on-line detection of energy efficiency of the pump system and analysis of energy consumption, and can find defects in the operation of the pump system in time. Since the current energy efficiency testing methods for pump systems are all on-site data collection, and then off-line analysis. The results obtained in this way will cause a large lag. When the test efficiency is found to be low, it is difficult to find out the existing problems in time at the test site so as to propose reasonable solutions. The research and development of this system platform can realize online energy consumption analysis, point out the problems in operation, and technicians can find problems in time and find energy waste on site.
(3)本实用新型实现泵类系统能效检测系统小型化，提高其便携性，具有较高的自主研发权。由于目前泵类系统能效测试大多都是实验室的试验平台，携带至测试现场开展能效测试的可能性较低。另外，国外的测试设备依据的测试标准及方法与国内的不一致，导致其推广适用性较低。本项目研发的泵类系统能效测试系统正是为了解决以上问题，其测试依据为我国泵类系统测试标准和测试方法。该系统进一步缩小检测设备的体积，方便外出携带进行测试，以满足进一步推广应用的需求。(3) The utility model realizes the miniaturization of the energy efficiency detection system of the pump system, improves its portability, and has relatively high independent research and development rights. Since most of the current pump system energy efficiency tests are laboratory test platforms, the possibility of carrying them to the test site for energy efficiency testing is low. In addition, the test standards and methods based on foreign test equipment are inconsistent with domestic ones, resulting in low applicability for promotion. The pump system energy efficiency test system developed by this project is to solve the above problems, and its test basis is my country's pump system test standards and test methods. The system further reduces the size of the detection equipment, which is convenient to carry out for testing, so as to meet the needs of further popularization and application.
(4)本实用新型实现泵类系统能效测试数据的无线传输。该测试系统可实现将现场采集的测试结果及能耗分析结果通过联网传输至测试结构办公地点。由于对泵类系统进行性能比对时所需要的测试周期较长，测试人员无法长期及时刻在测试现场查看其测试状态。通过该功能则实现远程进行泵类系统进行测试监控，节约测试人力和测试成本。(4) The utility model realizes the wireless transmission of the energy efficiency test data of the pump system. The test system can transmit the test results and energy consumption analysis results collected on-site to the office location of the test structure through the network. Due to the long test cycle required for performance comparison of pump systems, testers cannot check their test status at the test site for a long time and at all times. Through this function, remote testing and monitoring of pump systems can be realized, saving testing manpower and testing costs.
附图说明Description of drawings
图1为本实用新型的结构框图。Fig. 1 is a structural block diagram of the utility model.
具体实施方式Detailed ways
下面结合附图对本实用新型进行进一步的说明。Below in conjunction with accompanying drawing, the utility model is further described.
如图1所示，一种泵类系统的在线能效测试和能耗分析系统，包括传感器组模块、传感器信号处理模块、显示模块、存储模块、通信模块、主控制器模块和电源转换模块；所述传感器组模块数据连接所述传感器信号处理模块，所述传感器信号处理模块分别数据连接所述主控制器模块、显示模块、存储模块和通信模块，所述主控制器模块分别数据连接所述显示模块、存储模块和通信模块；检测数据可不经主控制器模块自动在显示模块和存储模块中显示和存储，也可直接通过通信模块上传至远程监控平台中，完成能效测试；检测数据经主控制器模块的技术分析，完成能耗分析并将结果传输至显示模块、存储模块和通信模块，这样系统响应速度快，运行效率高；所述电源转换模块电气连接所述主控制器模块，为主控制器模块和各个模块提供电能。As shown in Figure 1, an online energy efficiency test and energy consumption analysis system for a pump system includes a sensor group module, a sensor signal processing module, a display module, a storage module, a communication module, a main controller module and a power conversion module; The sensor group module data is connected to the sensor signal processing module, the sensor signal processing module is respectively connected to the main controller module, the display module, the storage module and the communication module, and the main controller module is respectively connected to the display Module, storage module and communication module; the detection data can be automatically displayed and stored in the display module and storage module without the main controller module, and can also be directly uploaded to the remote monitoring platform through the communication module to complete the energy efficiency test; the detection data is controlled by the main controller The technical analysis of the power converter module completes the energy consumption analysis and transmits the results to the display module, storage module and communication module, so that the system responds quickly and operates with high efficiency; the power conversion module is electrically connected to the main controller module, and the main The controller module and individual modules provide electrical power.
进一步的，还包括有备用电源模块，所述备用电源模块电气连接所述电源转换模块，所述备用电源模块采用可充电的24V锂电池，为系统提供电源。Further, it also includes a backup power module, the backup power module is electrically connected to the power conversion module, and the backup power module uses a rechargeable 24V lithium battery to provide power for the system.
进一步的，所述传感器组模块包括电流传感器、电压传感器、(管道)压力传感器、(管道)温度传感器和(管道)超声波流量传感器。其中，电流传感器和电压传感器用于连接在待测的泵类系统的电路上，(管道)压力传感器、(管道)温度传感器和(管道)超声波流量传感器用于安装在待测的泵类系统的管道上；电流传感器采用钳形电流传感器，量程为0.00mA～1000A，精度为±0.5％FS；(管道)压力传感器量程为-100kPa～0～100Mpa，精度为0.25级；(管道)温度传感器量程为-50～350℃，精度为0.5级；(管道)超声波流量传感器测量管径范围为DN50～700mm。Further, the sensor group module includes a current sensor, a voltage sensor, a (pipeline) pressure sensor, a (pipeline) temperature sensor and a (pipeline) ultrasonic flow sensor. Among them, the current sensor and voltage sensor are used to connect to the circuit of the pump system to be tested, and the (pipeline) pressure sensor, (pipeline) temperature sensor and (pipeline) ultrasonic flow sensor are used to be installed on the circuit of the pump system to be tested. On the pipeline; the current sensor adopts a clamp current sensor with a range of 0.00mA～1000A and an accuracy of ±0.5% FS; the (pipeline) pressure sensor has a range of -100kPa～0～100Mpa and an accuracy of 0.25; the (pipeline) temperature sensor has a range of The temperature is -50～350℃, and the precision is 0.5 grade; (pipeline) ultrasonic flow sensor measures the diameter range of DN50～700mm.
进一步的，所述传感器信号处理模块包括数据连接的电参数处理模块和高精度A/D转换模块，所述电流传感器和电压传感器数据连接所述电参数处理模块，所述压力传感器、温度传感器和流量传感器数据连接所述高精度A/D转换模块。电参数处理模块采用RS485接口，高精度A/D转换模块共有8组通信，具有24位的精度和30kSPS的数据转换速度。Further, the sensor signal processing module includes a data-connected electrical parameter processing module and a high-precision A/D conversion module, the current sensor and voltage sensor data are connected to the electrical parameter processing module, and the pressure sensor, temperature sensor and The flow sensor data is connected to the high-precision A/D conversion module. The electrical parameter processing module adopts RS485 interface, and the high-precision A/D conversion module has a total of 8 communication groups, with 24-bit precision and 30kSPS data conversion speed.
进一步的，所述显示模块为一块7寸的带触摸功能的显示屏。Further, the display module is a 7-inch display screen with touch function.
进一步的，所述存储模块包括SD卡和U盘两种存储方式，SD卡最大兼容存储容量为8G，U盘则不受限制，主要是存储数据为泵类系统运行数据，包括实时进、出液体流速，实时进、出口压力，实时进、出口温度，实时泵类机组电参数、能耗等信息。Further, the storage module includes two storage methods, SD card and U disk. The maximum compatible storage capacity of SD card is 8G, and the U disk is not limited. The main storage data is the operation data of the pump system, including real-time input and output. Liquid flow rate, real-time inlet and outlet pressure, real-time inlet and outlet temperature, real-time pump unit electrical parameters, energy consumption and other information.
进一步的，所述通信模块采用GPRS无线通信模块或RS232/485串口模块或以太网网络模块(TCP/IP模块)或以上的结合，其中，GPRS无线通信模块可通过sim卡无线拨号上网方式与远程服务器进行连接通信，进行数据传输；RS232串口模块可使设备通过RS232/485线或232/485转USB数据线与服务器连接，进行数据传输；以太网网络模块(TCP/IP模块)使设备具有网络通信的功能，通过网线与PC机连接，可以建立通信信道进行数据传输。Further, the communication module adopts a GPRS wireless communication module or a RS232/485 serial port module or an Ethernet network module (TCP/IP module) or a combination of the above, wherein the GPRS wireless communication module can communicate with the remote through a sim card wireless dial-up mode The server connects and communicates for data transmission; the RS232 serial port module enables the device to connect to the server through the RS232/485 cable or 232/485 to USB data cable for data transmission; the Ethernet network module (TCP/IP module) enables the device to have network Communication function, connect with PC through network cable, and establish communication channel for data transmission.
进一步的，所述主控制器模块采用MCU主控板控制芯片，负责所有功能模块的控制、数据的采集处理等功能，主控制芯片通过RS485接口以特定的通信协议(modbus)接发所有功能模块的数据。Further, the main controller module adopts the MCU main control board control chip, which is responsible for functions such as the control of all functional modules, data collection and processing, and the main control chip sends and receives all functional modules with a specific communication protocol (modbus) through the RS485 interface The data.
进一步的，所述电源转换模块包括两种模块：24V转5V电源模块和5V转3V电源模块。其中24V转5V电源模块为U盘提供电源，并作为3.3V电压稳压电路的输入电源；5V转3V电源模块将5V输入电压经过DC-DC的方式输出3V电压，为主系统的控制电路提供电源，最大输出电流可达2A。Further, the power conversion module includes two types of modules: a 24V to 5V power supply module and a 5V to 3V power supply module. Among them, the 24V to 5V power supply module provides power for the U disk and serves as the input power of the 3.3V voltage regulator circuit; the 5V to 3V power supply module outputs the 5V input voltage through DC-DC to provide 3V voltage for the control circuit of the main system. power supply, the maximum output current can reach 2A.
本实用新型还提供一种泵类系统的在线能效测试和能耗分析方法，基于上述一种泵类系统的在线能效测试和能耗分析系统，其具体实施步骤如下：The utility model also provides an online energy efficiency test and energy consumption analysis method for a pump system, based on the above-mentioned online energy efficiency test and energy consumption analysis system for a pump system, the specific implementation steps are as follows:
S1.确定待测的泵类系统的检测条件，包括检测参数确定、检测位置确定、泵类系统运行工况等内容；S1. Determine the detection conditions of the pump system to be tested, including determination of detection parameters, determination of detection locations, operating conditions of the pump system, etc.;
S2.根据S1待测的泵类系统的检测条件，确定需安装的检测传感器，并完成检测传感器组模块的安装布置；S2. According to the detection conditions of the pump system to be tested in S1, determine the detection sensors to be installed, and complete the installation and arrangement of the detection sensor group modules;
S3.待泵类系统运行稳定后，开启系统检测按钮，系统开始对检测数据进行采集、分析和储存，同时实时上传至远程监控平台；S3. After the pump system is running stably, turn on the system detection button, and the system starts to collect, analyze and store the detection data, and upload it to the remote monitoring platform in real time;
S4.检测人员既可通过显示模块查看检测数据及分析结果，也可以通过互联网访问远程监控平台进行查看；待检测完成后，检测人员可通过监控平台快速生成检测报告；S4. The inspectors can view the detection data and analysis results through the display module, or access the remote monitoring platform through the Internet to view; after the inspection is completed, the inspectors can quickly generate a detection report through the monitoring platform;
S5.完成泵类系统能效检测后，移除相关检测传感器，并不影响泵类系统的正常运行。S5. After completing the energy efficiency detection of the pump system, removing the relevant detection sensors will not affect the normal operation of the pump system.
以上所述者，仅为本实用新型的较佳实施例而已，当不能以此限定本实用新型实施的范围，即大凡依本实用新型申请专利范围及实用新型说明内容所作的简单的等效变化与修饰，皆仍属本实用新型专利涵盖的范围内。The above are only preferred embodiments of the present utility model, and should not limit the scope of the utility model implementation with this, that is, all simple equivalent changes made according to the utility model patent application scope and utility model description content and modification, all still belong to the scope covered by the utility model patent.
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| CN109322819B (en) * | 2018-12-13 | 2024-11-22 | 广州能源检测研究院 | An online energy efficiency test and energy consumption analysis system and method for a pump system |
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