CN216621542U - NB valve control ultrasonic heat meter - Google Patents
NB valve control ultrasonic heat meter Download PDFInfo
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- CN216621542U CN216621542U CN202121999058.3U CN202121999058U CN216621542U CN 216621542 U CN216621542 U CN 216621542U CN 202121999058 U CN202121999058 U CN 202121999058U CN 216621542 U CN216621542 U CN 216621542U
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Abstract
The utility model provides an NB valve control ultrasonic heat meter, which comprises a microprocessor and a peripheral circuit thereof, an ultrasonic metering circuit, an NB _ IoT communication module, a control valve circuit, an infrared communication circuit, a voltage detection circuit, a storage circuit, a key circuit, a power supply circuit, an NB _ IoT communication module control circuit, an SIM card interface circuit and a liquid crystal display circuit.
Description
Technical Field
The utility model relates to the field of intelligent heat meters, in particular to an ultrasonic heat meter with an NB communication function and capable of remotely controlling a valve.
Background
The ultrasonic heat meter is used for a household heating system using hot water as a heat transfer medium, and is a metering device for metering heat released (or absorbed) by the hot water through a water inlet pipe and a water return pipe. The paired temperature sensors measure the temperature of the inlet water and the temperature of the return water, the ultrasonic flowmeter measures the volume of the hot water flowing through the pipeline, and the two data are collected and then sent to the calculator to calculate the heat used by the user and are displayed.
The traditional ultrasonic heat meter used by a heating power company generally adopts a wired connection mode of M-BUS or 485, so that the problem of wired meter reading of the ultrasonic heat meter can be solved; however, in the wired meter reading mode in the prior art, the communication lines are used for connection in the units, so that great inconvenience is brought to construction, wiring is difficult, construction difficulty is high, and waste of manpower and material resources is caused by high maintenance difficulty. Along with the popularization of NB signals in recent years, the requirement of adopting a wireless transmission mode is more and more large, the NB-IOT wireless remote transmission ultrasonic heat meter is additionally provided with an NB-IOT wireless remote transmission device on the basis of the original ultrasonic heat meter, the problem of installation and wiring of the existing ultrasonic heat meter is effectively solved by utilizing the NB-IOT wireless remote transmission technology, and the technical support is provided for the construction of the urban Internet of things.
The utility model combines an ultrasonic flow measurement technology and an NB wireless communication technology, and designs an ultrasonic heat meter which has an NB communication function and can remotely control a valve.
Disclosure of Invention
The utility model aims to provide an NB valve control ultrasonic heat meter, which adopts an advanced ultrasonic flow metering technology to obtain fluid flow, adopts a temperature sensor to measure the temperature of inlet water and return water, calculates the heat, adopts an NB internet of things communication technology to upload the obtained heat data to a management center through an NB network, and the management center can remotely control the opening and closing of a heat meter valve, thereby facilitating the management of a management department on the meter and saving the manpower and financial resources.
In order to achieve the above object, the technical solution of the present invention is as follows:
NB valve accuse ultrasonic wave calorimeter contains microprocessor and peripheral circuit, ultrasonic wave measurement circuit, NB _ IoT communication module, accuse valve circuit, infrared communication circuit, voltage detection circuit, memory circuit, button circuit, power supply circuit, NB _ IoT communication module accuse electric circuit, SIM card interface circuit, liquid crystal display circuit, characterized by:
the power supply circuit provides 3.6V voltage to supply power to the microprocessor and each functional module;
the ultrasonic metering circuit adopts a time-to-digital converter, namely TDC-GP22 and a peripheral circuit thereof, a downstream transducer and a counter-current transducer arranged on a heat meter measuring pipe section are matched to measure the time difference delta T of ultrasonic wave in downstream and counter-current propagation, a temperature sensor is matched to measure the temperature difference delta T of inlet temperature and outlet temperature, the ultrasonic metering circuit communicates the measured delta T and delta T to a microprocessor in an SPI mode, and the microprocessor can calculate the consumed heat according to a formula;
the storage circuit is formed by independent external storage chips, and the storage chips are communicated with the microprocessor by I2C to store important parameter data;
The power supply detection circuit is used for detecting the voltage of the battery, and the microprocessor AD executes electroless alarm operation when detecting that the voltage is lower than a set value;
the infrared communication circuit is used for correcting parameters of the heat meter;
the NB _ IoT communication module is used for communicating with external equipment, and the microprocessor realizes the transmission of the data of the calorimeter of the Internet of things through the NB communication module;
the SIM card interface circuit is connected with the SIM card seat, the NB Internet of things mobile phone card is installed in the SIM card seat and receives network signals of the NB communication base station, and the related port of the NB communication base station is connected with the NB communication module;
the NB _ IoT communication module power control circuit is used for controlling the power supply of the NB _ IoT communication module by the microprocessor;
the key circuit adopts a touch key to support a user or meter reading personnel to switch the liquid crystal display to display related parameter information by pressing the key, and simultaneously supports field personnel to trigger the heat meter by pressing the key so that the heat meter can report data through an NB network;
the liquid crystal display circuit adopts a low-power-consumption LCD (liquid crystal display) screen and is used for displaying the operation data information of the heat meter;
the control valve circuit is used for controlling the opening and closing of a valve arranged in the heat meter pipe section, and a control end is connected with a port of the microprocessor;
The utility model has the beneficial effects that:
(1) according to the NB valve control ultrasonic heat meter, the fluid flow is obtained by adopting an advanced ultrasonic flow metering technology, the temperature of inlet water and return water is measured by adopting the temperature sensor, the heat is calculated, the obtained heat data is uploaded to the management center through the NB network by adopting the NB internet of things communication technology, the management center can remotely control the opening and closing of the heat meter valve, the management of a management department on the meter is facilitated, the labor and the financial resources are saved
(2) The NB valve control ultrasonic heat meter has the advantages of high integration level, better measurement stability, low failure rate and convenience in debugging and maintenance.
Drawings
Fig. 1 is a schematic block diagram of an NB valve-controlled ultrasonic heat meter according to the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1: an NB valve control ultrasonic heat meter comprises a microprocessor and peripheral circuits thereof, an ultrasonic metering circuit, an NB _ IoT communication module, a valve control circuit, an infrared communication circuit, a voltage detection circuit, a storage circuit, a key circuit, a power supply circuit, an NB _ IoT communication module electric control circuit, an SIM card interface circuit and a liquid crystal display circuit,
The power supply circuit provides 3.6V voltage to supply power to the microprocessor and each functional module;
the ultrasonic metering circuit adopts a time-to-digital converter, namely TDC-GP22 and a peripheral circuit thereof, and is matched with a downstream transducer and a countercurrent transducer arranged on a heat meter measuring pipe section to measure the time difference delta T of ultrasonic wave in downstream and countercurrent propagation, and is matched with a temperature measuring resistor to measure the temperature difference delta T of inlet temperature and outlet temperature, the ultrasonic metering circuit communicates the measured delta T and delta T to a microprocessor in an SPI mode, and the microprocessor can calculate the consumed heat according to a formula; specifically, pins P1.4-P1.7 of a microprocessor of the TDC-GP22 are connected with an SI end, an SO end, an SSN end and an SCK end of the TDC-GP22, SPI communication is realized, an INTGP2 of the TDC-GP22 is connected with a PJ.2 pin of the microprocessor to inform the microprocessor that the measurement is finished, the microprocessor can read a measurement time signal and a temperature signal, a Fire _ UP end of the TDC-GP22 is connected with a resistor R21, a resistor R24 and a capacitor C16 to drive a downstream transducer to send ultrasonic waves, a Fire _ DOWN end of the TDC-GP22 is connected with a resistor R22, a resistor R23 and a capacitor C15 to drive a reverse flow transducer to send ultrasonic waves, a PT1 end of the TDC-GP22 is connected with an inlet temperature sensor, and a PT4 end of the TDC-GP22 is connected with an outlet temperature sensor.
The memory circuit is composed of independent external memory chips, the memory chips and the microprocessor are communicated by I2C to store important parameter data, specifically, a chip M24M01-RMN6TP is used as the external memory chip, and SDA, SCL and WP are respectively connected with the ends of PC13, PC14 and PC15 of the microprocessor.
The power supply detection circuit is used for detecting the voltage of a battery, when the voltage is detected to be lower than a set value by the microprocessor AD, the electroless alarm operation is executed, the enabling end of the detection circuit is connected with the PJ.7 end of the microprocessor, the signal output end is connected with the P1.0 end of the microprocessor, and the detection circuit is composed of an NPN type triode Q6, a PNP type triode Q5 resistor and resistors R51-R55, wherein the base electrode of the triode Q6 is connected with the PJ.7 end of the microprocessor through a resistor R51; the collector of Q6 is connected with the collector of Q5 through resistance R52, and resistance R52 and resistance R53 are connected with power VBAT simultaneously, and power VBAT is connected with the emitter of Q5, and the collector of Q5 is grounded after resistance R54, R55, and voltage detection circuit signal output CELL is connected with P1.0 of microprocessor.
The infrared communication circuit is used for correcting parameters of the heat meter, the infrared communication circuit is a classical circuit comprising an infrared transmitting circuit and an infrared receiving circuit, and specific circuit implementation modes are not repeated herein, wherein an output end of the infrared transmitting circuit is connected with a P3.2 port of the microprocessor, and an input end of the infrared receiving circuit is connected with the P3.2 port of the microprocessor.
The NB _ IoT communication module is used for communicating with external equipment, the microprocessor realizes transmission of the data of the calorimeter of the Internet of things through the NB communication module, specifically, the NB module selects a remote BC95 module, the NB module communicates with the microprocessor through a serial port, the classical application of the module is selected in the embodiment, and specifically, the implementation circuit is not described in detail.
The SIM card interface circuit is connected with the SIM card seat, the NB internet of things mobile phone card is installed in the SIM card seat and receives network signals of the NB communication base station, the SIM card circuit adopts a chip SLM76CF3201P, and related ports of the SIM card interface circuit are connected with corresponding ports of the NB communication module through plug connectors.
The NB _ IoT communication module power control circuit is used for controlling the power supply of the NB _ IoT communication module by the microprocessor,
NB _ IoT communication module electricity control pin NB _ EN is connected with P3.3 of microprocessor, and microprocessor P3.3IO port output high-low level realizes that VBAT passes through 2 field effect transistor Q4, Q7 and switches on or off the power supply end of NB _ IoT communication module.
The key circuit adopts a touch key to support a user or meter reading personnel to switch the key to display related parameter information of the liquid crystal, and simultaneously supports field personnel to trigger the heat meter through the key to enable the heat meter to report data through an NB network; specifically, the touch-sensitive key chip BS801B and its peripheral circuits are employed.
The liquid crystal display circuit adopts a low-power-consumption LCD liquid crystal screen and is used for displaying the operation data information of the heat meter, and the liquid crystal display part is connected with part of ports of the microprocessor.
The control valve circuit is used for controlling the opening and closing of a valve arranged in a heat meter pipe section, a control end is connected with a port of a microprocessor, specifically, the opening and closing control ends FA + and FA-of the valve are respectively connected with the P6.0 port and the P6.1 port of the microprocessor, and positive and negative rotation of a valve motor is realized through 6 triodes and two microprocessor pin control circuits, so that the opening and closing of the valve are realized, the control valve circuit adopts a classical electric valve control circuit, and the specific implementation mode of the circuit is not repeated herein.
The type of the microprocessor adopted by the utility model is as follows: MSP430FR 6972.
The circuit of the utility model can realize the following functions: the flow is measured by ultrasonic waves, flow data are uploaded by an NB (NB) network, an infrared communication interface is arranged, infrared flow correction can be carried out, a remote control valve can be carried out through the NB network, and data are uploaded at regular time.
Claims (1)
- The NB valve control ultrasonic heat meter comprises a microprocessor and peripheral circuits thereof, an ultrasonic metering circuit, an NB _ IoT communication module, a control valve circuit, an infrared communication circuit, a voltage detection circuit, a storage circuit, a key circuit, a power supply circuit, an NB _ IoT communication module control circuit, an SIM card interface circuit and a liquid crystal display circuit, and is characterized in that:The power supply circuit provides 3.6V voltage to supply power to the microprocessor and each functional module;the ultrasonic metering circuit adopts a time-to-digital converter, namely TDC-GP22 and a peripheral circuit thereof, and the ultrasonic metering circuit communicates data to the microprocessor in an SPI mode;the storage circuit is formed by independent external storage chips, and the storage chips are communicated with the microprocessor by I2C to store important parameter data;the voltage detection circuit is used for detecting the voltage of the battery, and the microprocessor AD executes electroless alarm operation when detecting that the voltage is lower than a set value;the infrared communication circuit is used for correcting parameters of the heat meter;the NB _ IoT communication module is used for communicating with external equipment, and the microprocessor realizes the transmission of the data of the calorimeter of the Internet of things through the NB communication module;the SIM card interface circuit is connected with the SIM card seat, the NB Internet of things mobile phone card is arranged in the SIM card seat and used for receiving network signals of the NB communication base station, and the related port of the NB Internet of things mobile phone card is connected with the NB communication module;the NB _ IoT communication module power control circuit is used for controlling the power supply of the NB _ IoT communication module by the microprocessor;the key circuit adopts a touch key to support a user or meter reading personnel to switch the key to display related parameter information of the liquid crystal, and simultaneously supports field personnel to trigger the heat meter through the key to enable the heat meter to report data through an NB network;The liquid crystal display circuit adopts a low-power-consumption LCD screen and is used for displaying the operation data information of the heat meter;the valve control circuit is used for controlling the opening and closing of a valve arranged in the heat meter pipe section, and a control end is connected with a port of the microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121999058.3U CN216621542U (en) | 2021-08-24 | 2021-08-24 | NB valve control ultrasonic heat meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121999058.3U CN216621542U (en) | 2021-08-24 | 2021-08-24 | NB valve control ultrasonic heat meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216621542U true CN216621542U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121999058.3U Active CN216621542U (en) | 2021-08-24 | 2021-08-24 | NB valve control ultrasonic heat meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216621542U (en) |
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2021
- 2021-08-24 CN CN202121999058.3U patent/CN216621542U/en active Active
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