CN209149557U - Terminal device for heating power - Google Patents

Abstract

The utility model discloses a kind of terminal devices for heating power, including power circuit, sensor circuit, telecommunication circuit and control circuit, the power circuit is electrically connected with control circuit, the sensor circuit and telecommunication circuit are electrically connected with control circuit, and the telecommunication circuit uses NB-IoT telecommunication circuit.Because NB-IoT telecommunication circuit covers wide characteristic, the purpose for ensuring that data successfully return can achieve, and because of the characteristic of NB-IoT telecommunication circuit low-power consumption, to reach reduction power consumption, extend the purpose of the service life of component and battery.

Description

Terminal device for heating power

Technical field

The utility model relates to heating power fields, and in particular, to a kind of terminal device for heating power.

Background technique

Due to the industry particularity of heating power industry, hardware terminal is in high temperature mostly, and high humidity and signal of communication are weaker In environment.Currently, most of data transfer mode under wan environment is using traditional approach such as GPRS, the successful passback rate of data It is limited, and in the environment of using battery as power supply system, power consumption is larger, needs to frequently replace battery；And for electronic component And various modules, long-term work can increase loss rate under high current environment.

Meanwhile the prior art is in terms of circuit design, generallys use the dedicated scheme of special plate, between the module of different function The degree of coupling it is higher, seem convenient, actually increase maintenance and replacement cost.

Utility model content

The purpose of this utility model is that in view of the above-mentioned problems, a kind of terminal device for heating power is proposed, to realize really Protect the advantages of data successfully return and reduce power consumption.

In order to achieve the above purposes, the technical solution adopted by the utility model is:

A kind of terminal device for heating power, including power circuit, sensor circuit, telecommunication circuit and control circuit, institute It states power circuit to be electrically connected with control circuit, the sensor circuit and telecommunication circuit are electrically connected with control circuit, described logical Believe that circuit uses NB-IoT telecommunication circuit.

Further, the power circuit, including voltage stabilizing chip, series electrical between the input terminal and ground of the voltage stabilizing chip Hold C8, series capacitance C9 between the output end and ground of the voltage stabilizing chip, capacitor C10 is in parallel with capacitor C9, the voltage stabilizing chip Input terminal be electrically connected with the end power supply VCC_BAT.

Further, it is 1 μ F that the capacitance of the capacitor C8, which is the capacitance of 0.1 μ F, the capacitor C9, capacitor C10's Capacitance is 0.1 μ F.

Further, the voltage stabilizing chip, using TPS78233 chip.

Further, the power circuit, including field-effect tube Q1, go here and there between the source electrode and grid of the field-effect tube Q1 Join resistance R12, the grid of the field-effect tube Q1 and the input terminal of power circuit connect, the drain electrode of the field-effect tube Q1 and electricity Series resistance R11 between the output end of source circuit, the output end and the end power supply VCC_BAT series resistance R10 of the power circuit.

Further, the resistance value of the resistance R10 is 20K Ω, and the resistance value of the resistance R11 is 10K Ω, the electricity The resistance value for hindering R12 is 3K Ω.

Further, the sensor circuit, including RS-485 interface circuit.

Further, the control circuit, including STM32L151C8T6 chip.

The technical solution of the utility model has the advantages that

The technical solution of the utility model, telecommunication circuit uses NB-IoT telecommunication circuit, because NB-IoT telecommunication circuit has Four big characteristic below: first is that covering is wide；Second is that having the ability of support magnanimity connection, low latency sensitivity, low equipment function are supported The network architecture of consumption and optimization；Third is that more low-power consumption；Fourth is that lower module cost.Because NB-IoT telecommunication circuit covers wide spy Property, it can achieve the purpose for ensuring that data successfully return, and because of the characteristic of NB-IoT telecommunication circuit low-power consumption, to reach reduction Power consumption extends the purpose of the service life of component and battery.

Detailed description of the invention

Fig. 1 is the functional block diagram described in the utility model embodiment for the terminal device of heating power；

Fig. 2 is the circuit diagram described in the utility model embodiment for the terminal device of heating power；

Fig. 3 to Figure 11 is the electronic circuitry of control circuit described in the utility model embodiment；

Figure 12 to Figure 18 is the electronic circuitry of sensor circuit described in the utility model embodiment；

Figure 19 to Figure 20 is the electronic circuitry of power circuit described in the utility model embodiment；

Figure 21 to Figure 30 is the electronic circuitry of telecommunication circuit described in the utility model embodiment.

Specific embodiment

It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.

The NB-IoT communication technology has following four big spies as the narrowband Internet of Things bottom communication technology under wan environment Property: first is that covering is wide；Second is that having the ability of support magnanimity connection, low latency sensitivity, low equipment power dissipation and optimization are supported The network architecture；Third is that more low-power consumption；Fourth is that lower module cost.By its technical advantage, can improve well existing Shortcoming of the GPRS technology in terms of heating power industry data passback.Meanwhile the NB-IoT mould group of encapsulated moulding is a variety of by its Different working conditions and data retransmission mechanism can preferably play its low-power consumption and cover wide characteristic.

In the power consumption for reducing whole front end system, need to choose suitable low-power consumption for different transmitting scenes Sensor and MCU remove redundant data transmissions function, take suitable transmission mode.In the case where making above-mentioned change, It needs to redesign circuit system to meet low-power consumption demand and improve the stability of system.

As depicted in figs. 1 and 2, a kind of terminal device for heating power, including power circuit, sensor circuit, communication electricity Road and control circuit, power circuit are electrically connected with control circuit, and sensor circuit and telecommunication circuit are electrically connected with control circuit, Telecommunication circuit uses NB-IoT telecommunication circuit.It is responsible for the power circuit of power supply and discharge prevention；It is responsible for the NB-IoT of data transmission Telecommunication circuit；It is responsible for the low-power consumption sensor circuit of front end data acquisition.Sensor circuit according to different application scenarios, including Temperature sensor DS18B20 and/or 3-axis acceleration sensor LIS3DH etc..It is responsible for function to dispatch and integrate the various communication technologys Control circuit.

Wherein, as shown in figure 19, power circuit, including voltage stabilizing chip, series electrical between the input terminal and ground of voltage stabilizing chip Hold C8, series capacitance C9 between the output end and ground of voltage stabilizing chip, capacitor C10 is in parallel with capacitor C9, the input terminal of voltage stabilizing chip It is electrically connected with the end power supply VCC_BAT.Power circuit primarily serves the effect of pressure stabilizing, with battery known to the flash-over characteristic of battery The reduction of electricity, discharge voltage can gradually decrease, in order to guarantee that each device can work normally and not excessive loss's electronic component, Voltage stabilizing chip is used in a power, provides stable voltage for each device of terminal device.

The capacitance of capacitor C8 is 0.1 μ F, and the capacitance of capacitor C9 is 1 μ F, and the capacitance of capacitor C10 is 0.1 μ F.

Voltage stabilizing chip, using TPS78233 chip.TSP78233 is a kind of low pressure difference linear voltage regulator (low dropout Regulator--LDO), the quiescent current of the voltage-stablizer is small, can be by output voltage stabilization in 3.3v, and peripheral circuit phase To simple, it is only necessary to several shunt capacitances.

As shown in figure 20, power circuit, including field-effect tube Q1, series resistance between the source electrode and grid of field-effect tube Q1 The grid of R12, field-effect tube Q1 and the input terminal of power circuit connect, the drain electrode of field-effect tube Q1 and the output end of power circuit Between series resistance R11, the output end of power circuit and the end power supply VCC_BAT series resistance R10.

The resistance value of resistance R10 is 20K Ω, and the resistance value of resistance R11 is 10K Ω, and the resistance value of resistance R12 is 3K Ω.

As shown in Figure 12 to Figure 18, sensor circuit is responsible for the low-power consumption sensor of front end data acquisition, according to transmission number According to difference, select different bottom communication modes, comprising: double wire system SPI, analog data acquisition and RS-485 interface electricity Road.Wherein, first two communication mode does not need excessive peripheral circuit, and that need to carry out process to data transmission procedure is RS- 485 interface circuits.As shown in figure 12.In RS-485 interface circuit SP3485 chip belong to meet RS-485 serial protocol+ 3.3V low-power consumption Half-duplex transceiver.SP3485 chip relies on the bipolarity CMOS technology characteristic of Sipex.Low-power consumption behaviour can be achieved Make, without influencing system performance.In bringing onto load, SP3485 chip can realize the data transmission of highest 10Mbps, and The faulty automatic protection characteristic of the receiver of SP3485 chip, the characteristic can make output be high level shape when inputting hanging State.

It is the electronic circuitry of telecommunication circuit as shown in Figure 21 to Figure 30, the technical program uses NB-IoT telecommunication circuit, RF circuit in Fig. 2 is the telecommunication circuit NB-IoT mould group of the front end hardware system, is responsible for the communication function of hardware system, needs The port of reserved and control circuit communication, with the port SIM of sim card slot connection and the NB test port of exploitation test as schemed Shown in 21.The port for the NB-IoT that this terminal uses includes:

1, the port SIM cluster, comprising: SIM_RST, SIM_CLK, SLK_DATA；

2, NB data transmission port cluster, comprising: NB_TXD_R, NB_RXD_R, NB_RESET；

3, radio-frequency antenna interface RF_ANT and NB test port.

As shown in Fig. 3 to Figure 11, control circuit, including STM32L151C8T6 chip.STM32L151C8T6 chip both may be used To guarantee to reduce oneself power consumption to greatest extent, and peripheral interface abundant is provided, for the sensor die of different communication mode Block uses.Meanwhile the core as modular system, the circuit are the key that each circuit successfully cooperates.

In the port of STM32L151C8T6 chip, in addition to vcc pin and gnd pin, other pins be broadly divided into A, B, tri- groups of C, while having the clock concept of terminal system clock and each port set again, it is selected in the port to different communication mode On, in order to guarantee the normal operation of terminal, therefore, to assure that the clock frequency of each port set is identical.In this terminal, mainly have Four kinds of different front end sensors, the data transfer mode of use include: four-wire system SPI, ADC, RS-485 and common end Mouth data transmission.As shown in figure 3, being directed to above-mentioned four kinds of communication modes, following four group interfaces are chosen:

1, SPI interface group, comprising: PA8 selects interface as piece, and PA5 is as system clock output interface, and PA6 is as MISO Interface, PA7 is as MOSI interface, and changes the important interruption input interface PA0 of MCU operating status.

2, ADC interface group, adc data acquisition is relatively easy, also not excessive peripheral circuit, comprising: two adc datas Input interface PA1 and PB15.

3, RS-485 interface group, comprising: data uplink input port PA3 and data downstream output port PA2.

4, common interfaces group, temperature data of the group interface for temperature sensor DS18B20 return, comprising: clock is defeated Outgoing interface PB8 and Data Input Interface PB9.

Other than the communication interface for carrying out data transmission with four different sensors, set in the control circuit interface In meter, one group of interruption input interface PB3--PB7 has been reserved, the functions such as state wake-up that may be needed for other sensors, It can be used for the interruption input interface of " one piece of development board multiple use ".

In addition to this, further include communication interface PB10, PB11 and PB12 that NB-IoT telecommunication circuit carries out data transmission.

NB-IoT technology is as the Internet of Things bottom communication technology under emerging wan environment, sea wide by its covering The technical advantage of connection and low-power consumption, can be applied perfectly to the data collection system of heating power industry.Meanwhile heating power industry Professionalism is mainly reflected in following two aspect:

1, it needs to guarantee the accurate passback of data in the environment of high temperature and humidity and dtr signal, extends component and battery Service life.

2, the front end sensors type in heating power industry is more, and different sensors is passed by different communication modes again Transmission of data, it needs to select unified MCU and meets the communication interface of various communication modes.

The technical program is directed to the above two o'clock, hardware circuit design by whole hardware system be divided into four it is different Functional circuit: power circuit, sensor circuit, NB-IoT telecommunication circuit and control circuit.It is directed to a variety of different data simultaneously Transmission mode devises on the control circuitry in the case where ensuring that there is no clock conflict and not damaging to each device A variety of different communication interfaces and suitable peripheral circuit, the design of these interface groups contemplate during actual development The system coordination scheduling problem that may be used, and done corresponding optimization.

The technical program is done primarily directed to the various sensor circuits using different communication mode of heating power industry Modularized circuit design, can coordinate the low power consumpting state of each circuit well, reduce between the circuit for completing different function The degree of coupling, and reduce the replacement cost of hardware.

Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of protection of this utility model.

Claims (9)

1. a kind of terminal device for heating power, which is characterized in that including power circuit, sensor circuit, telecommunication circuit and control Circuit processed, the power circuit are electrically connected with control circuit, and the sensor circuit and telecommunication circuit are electrically connected with control circuit It connects, the telecommunication circuit uses NB-IoT telecommunication circuit.

2. the terminal device according to claim 1 for heating power, which is characterized in that the power circuit, including pressure stabilizing Chip, series capacitance C8 between the input terminal and ground of the voltage stabilizing chip connect between the output end and ground of the voltage stabilizing chip Capacitor C9, capacitor C10 is in parallel with capacitor C9, and the input terminal of the voltage stabilizing chip is electrically connected with the end power supply VCC_BAT.

3. the terminal device according to claim 2 for heating power, which is characterized in that the capacitance of the capacitor C8 is The capacitance of 0.1 μ F, the capacitor C9 is 1 μ F, and the capacitance of capacitor C10 is 0.1 μ F.

4. the terminal device according to claim 2 for heating power, which is characterized in that the voltage stabilizing chip uses TPS78233 chip.

5. the terminal device according to claim 2 for heating power, which is characterized in that the power circuit, including field effect It should pipe Q1, the grid of series resistance R12 between the source electrode and grid of the field-effect tube Q1, the field-effect tube Q1 and power supply electricity The input terminal on road connects, series resistance R11, the power supply between the drain electrode of the field-effect tube Q1 and the output end of power circuit The output end and the end power supply VCC_BAT series resistance R10 of circuit.

6. the terminal device according to claim 5 for heating power, which is characterized in that the resistance value of the resistance R10 is The resistance value of 20K Ω, the resistance R11 are 10K Ω, and the resistance value of the resistance R12 is 3K Ω.

7. the terminal device according to claim 1 for heating power, which is characterized in that the sensor circuit, including RS- 485 interface circuits.

8. the terminal device according to claim 1 for heating power, which is characterized in that the control circuit, including STM32L151C8T6 chip.

9. the terminal device according to claim 1 for heating power, which is characterized in that the sensor circuit, including temperature Spend sensor and/or 3-axis acceleration sensor.