CN201852655U - Intelligent remote-transmission ultrasonic heat meter based on wireless sensor network - Google Patents

Intelligent remote-transmission ultrasonic heat meter based on wireless sensor network Download PDF

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CN201852655U
CN201852655U CN 201020261887 CN201020261887U CN201852655U CN 201852655 U CN201852655 U CN 201852655U CN 201020261887 CN201020261887 CN 201020261887 CN 201020261887 U CN201020261887 U CN 201020261887U CN 201852655 U CN201852655 U CN 201852655U
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module
wireless sensor
time
heat meter
ultrasonic
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CN 201020261887
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王光海
王杰礼
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山东二十度节能技术服务有限公司
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Abstract

The utility model relates to the technical field of data acquisition and processing of a wireless sensor network, in particular to an intelligent remote-transmission ultrasonic heat meter based on the wireless sensor network, which is characterized by being provided with a singlechip module, a time-digital conversion module, a wireless sensor module, a power module, a liquid crystal display (LCD), a keyboard input module, an M-bus interface and an infrared interface, wherein an ultrasonic transducer and an inlet and return water temperature sensor which are in a pair are electrically connected with the time-digital conversion module and the singlechip module; the singlechip module is electrically connected with the wireless sensor module, the LCD, the keyboard input module, the M-bus interface and the infrared interface; and the power module is electrically connected with the singlechip module, the time-digital conversion module and the wireless sensor module. By adopting the wireless sensor network technology, the intelligent remote-transmission ultrasonic heat meter realizes the ad hoc network of heat meters of all users and intelligent transmission and management through an internet, so that the heat meter can be installed without wiring, and the running cost of the meter is low.

Description

一种基于无线传感器网络的智能远传超声波热量表 An intelligent remote ultrasonic heat meter based wireless sensor network

技术领域 FIELD

[0001] 本实用新型涉及无线传感器网络的数据采集处理技术领域,具体地说是应用于计量和远程抄表的一种基于无线传感器网络技术的智能远传超声波热量表。 [0001] The present invention relates to the field of data acquisition and processing wireless sensor networks, in particular to a remote meter reading and applied to the measurement of ultrasonic heat meter based on intelligent remote wireless sensor network technology.

背景技术 Background technique

[0002] 无线传感器网络(WSN,Wireless Sensor Networks)是由大量具有感知能力、计算能力和无线通信能力的微型传感器节点构成的自组织分布网络系统,是集成了传感器、 微机电系统和网络三大技术而形成的一种全新的信息获取和处理技术。 [0002] The wireless sensor network (WSN, Wireless Sensor Networks) is a large number having awareness, self-organizing network distributed computing systems and wireless communication capabilities configured micro-sensor nodes, is the integration of sensors, microelectromechanical systems and networks three a new information acquisition and processing techniques formed. 该网络可以实时监测、感知和采集网络分布区域内的各种环境或监测对象的信息,并对其处理,传送给信息所需的用户。 The network real-time monitoring, sensing and information of monitored objects in the collection area distribution network, and its processing, required information to the user. 这种网络系统可广泛地应用于国防军事、国家安全、环境监测、交通管理、医疗卫生、工业制造、反恐抗灾、智能家居等诸多领域,是继因特网之后,将对21世纪人类生活方式产生重大影响的信息热点技术,因而近年来在国内外引起了基础研究和工程技术领域乃至高层政界的高度关注和重视。 This network system can be widely used in national defense, national security, environmental monitoring, traffic management, health care, industrial manufacturing, counter-terrorism disaster, smart home and other areas, following the Internet, it will have a significant human life in the 21st century the impact of information technology hot spots, which in recent years at home and abroad has aroused great concern and importance to basic research and engineering and technical fields as well as high-level politics.

[0003] 无线传感器网络(WSN)系统通常包括传感器节点(sensor node)、汇聚节点(sink node)和管理节点。 [0003] Wireless Sensor Network (WSN) systems typically include a sensor node (sensor node), the aggregation node (sink node) and node management. 大量传感器节点随机或有序部署在监测区域(sensor field)内部或附近,能够通过自组织方式构成网络。 A large number of sensor nodes deployed in a random or ordered monitoring area (sensor field) within or near, the network can be formed by self organization. 传感器节点监测的数据沿着其他传感器节点逐跳地进行传输,在传输过程中监测数据可能被多个节点处理,经过多跳后路由到汇聚节点,最后通过因特网或卫星网络到达管理节点。 Data monitoring sensor nodes is hop by hop along the other sensor nodes transmit monitoring data during transmission may be a plurality of node processing, after the multi-hop routing node to the sink, and finally to the management node via the Internet or a satellite network. 用户通过管理节点对传感器网络进行配置和管理,发布监测任务以及收集监测数据。 User to configure and manage the sensor network nodes by management, release monitoring tasks and collect monitoring data.

[0004] 热量表远程采集管理系统,因其远程、实时的抄表机制,智能、强大的处理功能,省时、省力的实际效果,而越来越受到物业公司和热力公司的青睐。 When the [0004] heat meter remote collection management system, because of its remote, real-time meter reading mechanism, intelligent, powerful processing capabilities, saving time, effort practical effect, while more and more property companies and heating companies of all ages. 热量表远程采集管理系统的数据传输方式有两种:一种是有线传输,现场采用M-bus总线结构,通过RS-232接入中心服务器。 Calorimeter data transmission remote collection management system two: one is a wired transmission, a field bus using the M-bus structure, via RS-232 central server access. 一种是有线和无线传输相结合,现场采用M-bus总线结构,通过GPRS网络接入中心服务器。 One is the combination of wired and wireless transmission, using the M-bus field bus architecture, the GPRS network through an access server. 这两种方式各有缺点。 Both approaches have their drawbacks. 第一种方式从热量表终端到中心服务器全部是有线连接,凿墙破路致使施工量大,也影响小区美观。 A first way from the heat meter terminal to a central server are all wired connection, Zaoqiang broken road construction so that large, but also affect cell appearance. 第二种方式采用楼内有线,楼外无线的方式,即一栋楼内的热量表用通信线连接起来送入M-bus集抄器,集抄器上连接无线发送终端(DTU,Data Teminal Unit),此终端能够通过GPRS网络连接到因特网,通过因特网找到数据中心,这样仍然避免不了楼层间和单元间穿管接线,并且运行通信费用高。 The second embodiment uses wired inside the building, outside the building wireless manner, i.e., a building of a communication line connecting the calorimeter with the M-bus into the copy sets, a transmission terminal connected to a wireless (DTU the meter reading device, Data Teminal unit), the terminal can be connected to the Internet through the GPRS network, through the Internet to find the data center, this does not avoid wear tube wiring between floors and between the unit and operating a high communication costs. 现有技术的上述不足,严重制约了热量表远程采集管理系统在较大范围内的推广应用。 The above-mentioned deficiencies of the prior art, severely restricted the application of heat meters remote collection management systems in a wide range.

发明内容 SUMMARY

[0005] 本实用新型的目的是为克服现有技术存在的不足,提出一种安装施工量小和运行费用低的基于无线传感器网络技术的智能远传超声波热量表。 [0005] The object of the present invention to overcome the disadvantages of the prior art, to provide a small construction volume and low running cost intelligent remote ultrasonic heat meter based wireless sensor network technology installation.

[0006] 本实用新型所采取的技术措施是: [0006] technical measures taken by the present invention are:

[0007] —种基于无线传感器网络的智能远传超声波热量表,包括超声波热量表,超声波热量表的表体内设有配对超声波换能器和进水温度传感器及回水温度传感器,其特征在于设有单片机模块、时间数字转换模块、无线传感器模块、电源模块、液晶显示器、键盘输入模块、M-bus接口、红外接口,上述各部件可以设在表体外的控制盒内,其中配对超声波换能器和进、回水温度传感器与时间数字转换模块及单片机模块电连接,以实现温度和流量信号的采集、测量及传输;单片机模块与无线传感器模块电连接,以实现通过因特网的无线传感器网络通讯;单片机模块与液晶显示器、键盘输入模块、M-bus接口、红外接口电连接,以实现数据显示、键盘输入操作、数据通讯功能;电源模块与单片机模块、时间数字转换模块、无线传感器模块电连接,以给各模块提 [0007] - based on intelligent remote ultrasonic heat meter types of wireless sensor networks, including ultrasonic heat meter, ultrasonic heat meter is provided with a table body and a pair of ultrasonic transducers return water temperature sensor and a temperature sensor, wherein is provided there microcontroller module, time to digital converter module, a wireless sensor module, a power module, a liquid crystal display, a keyboard input module, M-bus interface, an infrared interface, a member may be provided in each of the control box table in vitro, wherein the pair of ultrasonic transducers and inlet and return water temperature sensor and the time to digital converter module and the module is electrically connected to the microcontroller, temperature and flow to achieve signal acquisition, measurement and transmission; MCU module is electrically connected with the wireless sensor module, the wireless sensor network to enable communication through the Internet; microcontroller module and the liquid crystal display, a keyboard input module, M-bus interface, an infrared interface circuit is connected, for data display, a keyboard input operation, data communication; power module and the microcontroller module, time to digital converter module, a wireless sensor module is electrically connected, each module provides to send 工作电源。 Power supply.

[0008] 各模块的特点和功能如下:单片机模块MSP430F1612芯片是系统的核心,它通过定时器的中断功能协调、控制整个系统的各功能模块的运行时序,依次完成流量的测量计算、温度的测量、热量的计算以及实现数据显示、存储及无线通讯功能,同时接受用户对仪表参数的设置。 [0008] The features and functions of each module are as follows: MSP430F1612 microcontroller chip module is the core of the system, it is by a timer interrupt function coordination, control of the operation timing of the functional modules of the system, measuring the flow rate in order to complete the calculation, the measured temperature , calorie counting and for data display, storage and the wireless communication function, while receiving a user set of instrument parameters. 电源模块电压为3. 3V,由2组3. 6V锂电池并联后经过一个稳压芯片电路提供。 Voltage of the power module 3. 3V, via a chip regulator circuit provided in parallel with the two groups after the lithium battery 3. 6V. 时间数字转换模块分为两部分:温度信号采集部分和流量信号采集部分。 Time to digital converter module is divided into two parts: the temperature signal acquisition portion and the flow signal acquisition portion. 温度信号采集测量由安装在进回水端的PT1000温度传感器与TDC-GP2模块完成。 By measuring the temperature signal acquisition PT1000 temperature sensor installed in the intake side of the return module to the TDC-GP2. 利用PT1000不同阻值对同一电容充放电到某一电压值的时间不同,来间接测量温度值,这样TDC-GP2模块将PT1000不同温度下阻值的测量转换为时间的测量。 PT1000 different times using different resistance values ​​for the same certain voltage capacitor to charge and discharge, the value of temperature measured indirectly, such TDC-GP2 module converts the resistance measured at different temperatures PT1000 measurement time. 流量信号的采集测量由安装在进水端的配对超声波换能器与TDC-GP2模块完成,由TDC-GP2模块片内脉冲发生器产生的脉冲, 激励配对换能器的超声波收发,以进行热流体任一流速下的顺逆流超声波传输时间差的采集测量,也即流量信号的采集测量。 Acquisition of measured flow signal and a TDC-GP2 module completes the pairing ultrasonic transducer mounted on the inlet end, produced by the TDC-GP2 pulse generator module sheet pulse pairing ultrasonic excitation transducer, for thermal fluid cis countercurrent ultrasonic wave transmission at any time a measurement of the flow rate difference is acquired, i.e. the measured flow rate signal acquisition. 液晶显示器与单片机模块片内液晶驱动电路连接,液晶显示器采用通用型4段式。 And driving the liquid crystal display module microcontroller chip circuit, a liquid crystal display using a common type 4 stage. 键盘输入模块采用一个按键,利用单片机模块内部的定时器和按键中断功能,更换显示界面,与液晶显示器一起实现对流量、热量、温度等数据的显示。 Module uses a keyboard key, using an internal timer and the MCU module interrupt function keys, to replace the display interface, to achieve display of flow, heat, temperature and other data together with the liquid crystal display. 红外接口通过红外读写器,实现数据采集和设置。 Infrared interface by infrared reader, data collection and settings. M-bus接口通过数据集抄器,实现数据传输。 M-bus interface to copy the data set, a data transmission. 无线传感器模块用于接收和发送射频信号,采用SEMTECH公司开发的SX1212芯片,2400bps 下传输距离超过600米,工作频率为480Mhz,属470〜510Mhz免费计量频段。 Wireless sensor module for receiving and transmitting radio frequency signals, using SEMTECH SX1212 developed chip, the 2400bps transmission distance over 600 m, the working frequency of 480MHz, the genus 470~510Mhz free measurement band.

[0009] 本实用新型的工作过程如下:本实用新型用于测量热交换回路中热流体所吸收或转换的热能。 [0009] The present invention works as follows: the present invention for measuring fluid heat exchange circuit in heat energy absorbed or converted. 配对超声波换能器采集的流量信号和进回水温度传感器采集的温度信号经时间数字转换模块处理,传输到单片机模块进行存储计算,以得到瞬时热量。 Temperature signal acquired ultrasound transducer pair flow signal and the intake return temperature sensor acquisition process over time to digital converter module, a transmission module for storage to the microcontroller calculates, to obtain an instantaneous heat. 每1秒钟进行一次流量测量采集计算,每30秒钟进行一次温度测量采集计算,对瞬时热量进行时间积分运算作为累计热量,并进行数据存储,同时通过无线传感器模块传输到数据集抄器,再经过因特网传输到数据管理中心。 Every 1 second for flow measurement acquisition calculated for every 30 seconds the temperature measurement acquisition calculation, time integration of the instantaneous heat is accumulated as heat calculation and data storage, while the data transferred to the copy sets by wireless sensor module, and then transmitted to the data management center through the Internet.

[0010] 本实用新型的特点是采用无线传感器网络技术,实现各用户热量表的自组网智能传输和通过因特网的远传管理控制,安装使用不需要硬件布线,而且使用免费计量频段,安装和运行费用低。 [0010] The present invention is characterized by using wireless sensor network technology, the transmission of each user from the network intelligence through the heat meter and the remote management and control of the Internet, no hardware or cabling installation, and to free the band measurement, installation and low operating costs.

[0011] 附图说明: [0011] BRIEF DESCRIPTION OF DRAWINGS:

[0012] 附图是本实用新型的硬件结构方框图。 [0012] drawings is a block diagram showing a hardware configuration of the present novel utility.

[0013] 附图标记:配对超声波换能器1、进回水温度传感器2、单片机模块3、时间数字转换模块4、无线传感器模块5、电源模块6、液晶显示器7、键盘输入模块8、M-bus接口9、红外接口10。 [0013] reference numerals: a pair of ultrasonic transducer, return water temperature sensor 2 into, MCU module 3, a time to digital conversion module 4, the wireless sensor module 5, the power supply module 6, the liquid crystal display 7, keyboard input module 8, M -bus interface 9, infrared interface 10.

[0014] 具体实施方式: [0014] DETAILED DESCRIPTION:

[0015] 一种基于无线传感器网络的智能远传超声波热量表,包括超声波热量表,超声波热量表的表体内设有配对超声波换能器1和进水温度传感器2及回水传感器2、单片机模块3、时间数字转换模块4、无线传感器模块5、电源模块6、液晶显示器7、键盘输入模块8、M_bus接口9、红外接口10。 [0015] A wireless sensor network based intelligent remote ultrasonic heat meter, heat meter comprises an ultrasonic, ultrasonic heat meter is provided with a table in vivo pairing ultrasonic transducers 1 and 2 and the return water temperature sensor 2 sensor, MCU module 3, a time to digital conversion module 4, the wireless sensor module 5, the power supply module 6, the liquid crystal display 7, keyboard input module 8, M_bus interface 9, an infrared interface 10. 上述各部件可以设在表体外的控制盒内,其中配对超声波换能器1和进、回水温度传感器2与时间数字转换模块4及单片机模块3电连接,以实现温度和流量信号的采集、测量及传输;单片机模块3与无线传感器模块5电连接,以实现通过因特网的无线传感器网络通讯;单片机模块3与液晶显示器7、键盘输入模块8、M-bus接口9、 红外接口10电连接,以实现数据显示、键盘输入操作、数据通讯功能;电源模块6与单片机模块3、时间数字转换模块4、无线传感器模块5电连接,以给各模块提供工作电源。 Each box member may be provided in the control table in vitro, wherein the pair of ultrasonic transducers 1 and inlet and return water temperature sensor module 2 and 4 and the time to digital converter module 3 is electrically connected to the microcontroller, temperature and flow to achieve signal acquisition, measurement and transmission; microcontroller module 3 connected to the wireless sensor 5 the electrical modules for wireless sensor network communication via the Internet; microcontroller module 37, keyboard input module 8, M-bus interface 9, 10 are electrically infrared interface connected to the liquid crystal display, for data display, a keyboard input operation, data communication; microcontroller module 6 and the power module 3, a time to digital conversion module 4, the wireless sensor module 5 is electrically connected to the power supply to each module.

[0016] 各模块的特点和功能如下:单片机模块MSP430F1612芯片3是系统的核心,它通过定时器的中断功能协调、控制整个系统的各功能模块的运行时序,依次完成流量的测量计算、温度的测量、热量的计算以及实现数据显示、存储及无线通讯功能,同时接受用户对仪表参数的设置。 [0016] The features and functions of each module are as follows: MSP430F1612 microcontroller chip module 3 is the core of the system, it is coordinated by a timer interrupt function to control the operation timing of each of the functional modules of the system, in order to complete the flow measurement calculations, the temperature measuring, calculating and heat for data display, storage and the wireless communication function, while receiving a user set of instrument parameters. 电源模块6电压为3. 3V,由2组3. 6V锂电池并联后经过一个稳压芯片电路提供。 Voltage power supply module 6 3. 3V, via a chip regulator circuit provided in parallel with the two groups after the lithium battery 3. 6V. 时间数字转换模块4分为两部分:温度信号采集部分和流量信号采集部分。 Time to digital conversion module 4 is divided into two parts: the temperature signal acquisition portion and the flow signal acquisition portion. 温度信号采集测量由安装在进回水端的PT1000温度传感器与TDC-GP2模块4完成。 Temperature measurement signal acquisition installation 4 By the end of the flow and return temperature sensor PT1000 and TDC-GP2 module. 利用PT1000不同阻值对同一电容充放电到某一电压值的时间不同,来间接测量温度值,这样TDC-GP2模块4将PT1000不同温度下阻值的测量转换为时间的测量。 PT1000 different times using different resistance values ​​for the same certain voltage capacitor to charge and discharge, to indirectly measure the temperature, so that 4 TDC-GP2 module converts the resistance measured at different temperatures PT1000 measurement time. 流量信号的采集测量由安装在进水端的配对超声波换能器与TDC-GP2模块完成,由TDC-GP2模块片内脉冲发生器产生的脉冲,激励配对换能器的超声波收发,以进行热流体任一流速下的顺逆流超声波传输时间差的采集测量,也即流量信号的采集测量。 Acquisition of measured flow signal and a TDC-GP2 module completes the pairing ultrasonic transducer mounted on the inlet end, produced by the TDC-GP2 pulse generator module sheet pulse pairing ultrasonic excitation transducer, for thermal fluid cis countercurrent ultrasonic wave transmission at any time a measurement of the flow rate difference is acquired, i.e. the measured flow rate signal acquisition. 液晶显示器7与单片机模块3片内液晶驱动电路连接,液晶显示器7采用通用型4段式。 The liquid crystal display 7 is connected to the three liquid crystal driving circuit microcontroller module, using a common liquid crystal display 7 4-stage type. 键盘输入模块8采用一个按键,利用单片机模块3内部的定时器和按键中断功能,更换显示界面,与液晶显示器7 —起实现对流量、热量、温度等数据的显示。 Using a keyboard button input module 8, the use of 3 modules in the MCU timer interrupt function and key, change the display screen, a liquid crystal display 7-- with performing display of flow, heat, temperature and other data. 红外接口10通过红外读写器,实现数据采集和设置。 10 infrared interface by infrared reader, data collection and settings. M-bus接口9通过数据集抄器,实现数据传输。 M-bus interface 9 via a data set copy, a data transmission. 无线传感器模块5用于接收和发送射频信号,采用SEMTECH公司开发的SX1212芯片,2400bps下传输距离超过600米,工作频率为480Mhz,属470〜510 Mhz免费计量频段。 Wireless sensor module 5 for receiving and transmitting radio frequency signals, using SEMTECH SX1212 developed chip, the 2400bps transmission distance over 600 m, the working frequency of 480MHz, free metering genus 470~510 Mhz band.

[0017] 本实用新型的工作过程如下:本实用新型是用于测量热交换回路中热流体所吸收或转换的热能。 [0017] The present invention works as follows: The present invention is a heat exchange circuit for measuring the energy in the hot fluid absorbed or converted. 配对超声波换能器1采集的流量信号和进回水温度传感器2采集的温度信号经时间数字转换模块4处理,传输到单片机模块3进行存储计算,以得到瞬时热量。 Pairing the ultrasound transducer 1 temperature signal acquisition and signal flow and return flow temperature sensor 2 acquired by the processing time of digital conversion module 4, module 3 is transmitted to the microcontroller for storing calculated to obtain instantaneous heat. 每1 秒钟进行一次流量测量采集计算,每30秒钟进行一次温度测量采集计算,对瞬时热量进行时间积分运算作为累计热量,并进行数据存储,同时通过无线传感器模块5传输到数据集抄器,再经过因特网传输到数据管理中心。 Every 1 second acquisition once the flow measurement calculations, once calculated temperature measurements collected every 30 seconds, the instantaneous heat is accumulated as heat integrating operation time, and data storage, while the wireless sensor module 5 sets the data transmission to the copy control and then transmitted to the data management center through the Internet.

[0018] 本实用新型的特点是采用无线传感器网络技术,实现各户用热量表的自组网智能传输和通过因特网的远传管理控制,安装使用不需要硬件布线,而且使用免费计量频段,安装和运行费用低。 [0018] The present invention is characterized by using wireless sensor network technology, intelligent transmission network from each household remote management and control of the calorimeter through the Internet, it does not require hardware installation wiring, and metering the free band, the installation and low operating costs.

Claims (1)

  1. 1. 一种基于无线传感器网络的智能远传超声波热量表,包括超声波热量表,超声波热量表的表体内设有配对超声波换能器和进水温度传感器及回水温度传感器,其特征在于设有单片机模块、时间数字转换模块、无线传感器模块、电源模块、液晶显示器、键盘输入模块、M-bus接口、红外接口,其中配对超声波换能器和进、回水温度传感器与时间数字转换模块及单片机模块电连接,单片机模块与无线传感器模块、液晶显示器、键盘输入模块、M-bus 接口、红外接口电连接,电源模块与单片机模块、时间数字转换模块、无线传感器模块电连接。 A wireless sensor network based intelligent remote ultrasonic heat meter, heat meter comprises an ultrasonic, ultrasonic heat meter is provided with a table body and a pair of ultrasonic transducers return water temperature sensor and a temperature sensor, wherein is provided microcontroller module, time to digital converter module, a wireless sensor module, a power module, a liquid crystal display, a keyboard input module, M-bus interface, an infrared interface, and a pair of ultrasonic transducers inlet and return water temperature sensor and the time to digital converter module and a microcontroller module is electrically connected to the microcontroller module and wireless sensor module, a liquid crystal display, a keyboard input module, M-bus interface, an infrared interface circuit connected to the power module and the microcontroller module, time to digital converter module, a wireless sensor module electrically connected.
CN 201020261887 2010-07-19 2010-07-19 Intelligent remote-transmission ultrasonic heat meter based on wireless sensor network CN201852655U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102779403A (en) * 2012-07-30 2012-11-14 天津万华股份有限公司 Ultrasonic heat meter with plug-and-play M-BUS interface
CN102914389A (en) * 2011-08-04 2013-02-06 沈阳理工大学 Wireless heat meter for heating of residents
CN103090996A (en) * 2013-01-31 2013-05-08 肖楠 Ultrasonic heat meter main board performance detecting device
CN104677525A (en) * 2013-11-28 2015-06-03 哈尔滨市三和佳美科技发展有限公司 Remote transmission ultrasonic heat meter
CN104677410A (en) * 2013-11-29 2015-06-03 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 Sensor And Measuring Arrangement

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102914389A (en) * 2011-08-04 2013-02-06 沈阳理工大学 Wireless heat meter for heating of residents
CN102779403A (en) * 2012-07-30 2012-11-14 天津万华股份有限公司 Ultrasonic heat meter with plug-and-play M-BUS interface
CN102779403B (en) 2012-07-30 2014-01-01 天津万华股份有限公司 Ultrasonic heat meter with plug-and-play M-BUS interface
CN103090996A (en) * 2013-01-31 2013-05-08 肖楠 Ultrasonic heat meter main board performance detecting device
CN104677525A (en) * 2013-11-28 2015-06-03 哈尔滨市三和佳美科技发展有限公司 Remote transmission ultrasonic heat meter
CN104677410A (en) * 2013-11-29 2015-06-03 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 Sensor And Measuring Arrangement
US9660325B2 (en) 2013-11-29 2017-05-23 Endress+Hauser Conducta Gmbh+Co. Kg Sensor and measuring arrangement
CN104677410B (en) * 2013-11-29 2017-11-17 恩德莱斯和豪瑟尔分析仪表两合公司 Sensors and measuring devices

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