阅读说明：本技术 一种低功耗伸缩节变形监测无线节点及其控制方法 (Low-power consumption expansion joint deformation monitoring wireless node and control method thereof ) 是由 钱荣 徐杰 范振刚 于 2020-12-22 设计创作，主要内容包括：本发明提供一种低功耗伸缩节变形监测无线节点及其控制方法,包括：传感器,用于进行伸缩节的变形测量；单片机,用于采集与发送数据,以及控制其他模块的工作；无线模块,用于接收单片机发过来的测量数据并通过无线方式发送出去；电源模块,用于输出电压,供其他模块工作；电源开关电路,与单片机连接并由其控制,串联于需要控制的功能模块的电源电路中,控制相应模块是否工作；电源变换电路,与电源模块连接配合,以输出稳定的电压供给各功能电路。实现定周期的循环采集数据,以及基于测量尺寸的比对判断数据的发送。(The invention provides a low-power consumption expansion joint deformation monitoring wireless node and a control method thereof, wherein the low-power consumption expansion joint deformation monitoring wireless node comprises the following steps: the sensor is used for measuring the deformation of the telescopic joint; the singlechip is used for acquiring and sending data and controlling the work of other modules; the wireless module is used for receiving the measurement data sent by the singlechip and sending the measurement data in a wireless mode; the power supply module is used for outputting voltage to supply other modules to work; the power switch circuit is connected with and controlled by the singlechip and is connected in series in the power circuit of the functional module to be controlled to control whether the corresponding module works or not; and the power supply conversion circuit is connected and matched with the power supply module to output stable voltage to supply to each functional circuit. And realizing cyclic data acquisition in a fixed period and judging data sending based on comparison of the measurement size.)

1. The utility model provides a low-power consumption telescopic joint deformation monitoring wireless node which characterized in that includes:

the sensor is used for measuring the deformation of the telescopic joint;

the singlechip is used for acquiring and sending data and controlling the work of other modules;

the wireless module is used for receiving the measurement data sent by the singlechip and sending the measurement data in a wireless mode;

the power supply module is used for outputting voltage to supply other modules to work;

the power switch circuit is connected with and controlled by the singlechip and is connected in series in the power circuit of the functional module to be controlled to control whether the corresponding module works or not;

and the power supply conversion circuit is connected and matched with the power supply module to output stable voltage to supply to each functional circuit.

2. The wireless node for monitoring the deformation of the expansion joint with low power consumption of claim 1, further comprising a crystal oscillator clock circuit externally connected to the single chip microcomputer to realize accurate beat.

3. The low-power consumption telescopic joint deformation monitoring wireless node as claimed in claim 1, wherein the single chip microcomputer comprises:

the serial port communication module is used for being connected with the wireless module to realize data receiving and sending;

the AD conversion module is used for reading the corresponding voltage value output by the sensor and outputting the voltage value as a size value;

the control module compares the measured size value output by the AD conversion module with the previously measured size value to obtain a variation amplitude value, then compares the variation amplitude value with a preset threshold value, controls the wireless module to send data to a designated terminal if the variation amplitude value exceeds the threshold value, and does not need to send data if the variation amplitude value is smaller than the threshold value;

the I/O interface is used for being connected with the power switch circuit to control the on-off of the power switch circuit, and when the power switch circuit is closed, the single chip microcomputer enters a low power consumption mode;

and the awakening module is internally provided with a timing logic circuit, and awakens the single chip microcomputer through an internal timer terminal of the single chip microcomputer after the single chip microcomputer enters a low power consumption mode to a set interval time so as to realize cyclic acquisition and transmission of data.

4. The low-power consumption telescopic joint deformation monitoring wireless node as claimed in claim 1, wherein the sensor is a linear displacement sensor.

5. The wireless node for monitoring the deformation of the low-power consumption telescopic joint as claimed in claim 4, wherein the linear displacement sensor is a resistance ruler based on a sliding rheostat principle, and a fixed end of the linear displacement sensor is connected to the power circuit.

6. The telescopic joint deformation monitoring wireless node with low power consumption of claim 1, wherein a core device of the power switch circuit is a MOS FET relay.

7. The telescopic joint deformation monitoring wireless node with low power consumption of claim 1, wherein the wireless module is based on a LoRa technology.

8. The control method of the low-power consumption telescopic joint deformation monitoring wireless node is characterized by comprising the following steps:

s1, during measurement, the singlechip controls the power switch circuit to be turned on through the corresponding I/O interface, and at the moment, the sensor voltage division circuit immediately outputs the corresponding voltage value at the moment;

s2, reading the single chip microcomputer through a built-in AD conversion module, and obtaining a current size value through scaling;

s3, the control module arranged in the single chip compares the size value with the size value read in the previous time to obtain a change amplitude value, the change amplitude difference value is compared with a preset threshold value, and if the change amplitude value exceeds the preset threshold value, the wireless module is controlled to send out data;

if the change amplitude value is smaller than the set threshold value, data does not need to be sent so as to reduce power consumption;

s4, after the measurement is completed, the single chip microcomputer controls the power switch circuit to be closed through the corresponding I/O interface, and the single chip microcomputer enters a low power consumption mode;

s5, timing the interval time by a wakeup module arranged in the single chip microcomputer, and waking up the interval time by a timer terminal in the single chip microcomputer after the interval time reaches the designated time;

and S6, repeating the steps S1-S5, realizing cyclic collection of data in a fixed period, and judging the transmission of the data based on the comparison of the measured sizes.

Technical Field

The invention relates to the technical field of telescopic joint monitoring, in particular to a low-power consumption telescopic joint deformation monitoring wireless node and a control method thereof.

Background

In equipment such as a gas insulated metal enclosed transmission line (GIL) in the power industry, the length of a pipeline bus is often hundreds of meters or even longer, and along with the change of seasons and environmental temperature, the length of the pipeline bus can generate a certain amount of expansion, so that expansion joints need to be added in pipelines to compensate and adjust, otherwise, the connecting part can be torn, air leakage is caused, and accidents occur. Therefore, routine inspection of the change in deformation (dimensional change) of the telescopic joint is an important task. In order to adapt to the transformation of the original equipment, or simplify the construction, or reduce a plurality of angle considerations of manual workload, the deformation of the expansion joint can meet the various requirements by adopting automatic acquisition and wireless transmission; the existing monitoring system of the telescopic joint adopts various devices, so that the power consumption is high.

Disclosure of Invention

The invention aims to provide a low-power consumption expansion joint deformation monitoring wireless node and a control method thereof, which realize cyclic data acquisition in a fixed period and data sending judgment based on comparison of a measurement size, and reduce the power consumption of a circuit.

The invention provides the following technical scheme:

a low-power consumption expansion joint deformation monitoring wireless node and a control method thereof comprise the following steps:

the sensor is used for measuring the deformation of the telescopic joint;

the singlechip is used for acquiring and sending data and controlling the work of other modules;

the wireless module is used for receiving the measurement data sent by the singlechip and sending the measurement data in a wireless mode;

the power supply module is used for outputting voltage to supply other modules to work;

the power switch circuit is connected with and controlled by the singlechip and is connected in series in the power circuit of the functional module to be controlled to control whether the corresponding module works or not;

and the power supply conversion circuit is connected and matched with the power supply module to output stable voltage to supply to each functional circuit.

Preferably, the clock circuit also comprises a crystal oscillator clock circuit which is externally connected with the singlechip to realize accurate beat.

Preferably, the single chip microcomputer includes:

the serial port communication module is used for being connected with the wireless module to realize data receiving and sending;

the AD conversion module is used for reading the corresponding voltage value output by the sensor and outputting the voltage value as a size value;

the control module compares the measured size value output by the AD conversion module with the previously measured size value to obtain a variation amplitude value, then compares the variation amplitude value with a preset threshold value, controls the wireless module to send data to a designated terminal if the variation amplitude value exceeds the threshold value, and does not need to send data if the variation amplitude value is smaller than the threshold value;

the I/O interface is used for being connected with the power switch circuit to control the on-off of the power switch circuit, and when the power switch circuit is closed, the single chip microcomputer enters a low power consumption mode;

and the awakening module is internally provided with a timing logic circuit, and awakens the single chip microcomputer through an internal timer terminal of the single chip microcomputer after the single chip microcomputer enters a low power consumption mode to a set interval time so as to realize cyclic acquisition and transmission of data.

Preferably, the sensor is a linear displacement sensor.

Preferably, the linear displacement sensor is a resistance ruler based on the sliding rheostat principle, and the fixed end of the linear displacement sensor is connected to the power circuit.

Preferably, the core device of the power switching circuit is a MOS FET relay.

Preferably, the wireless module is based on the LoRa technology.

A control method for a low-power consumption expansion joint deformation monitoring wireless node comprises the following steps:

s1, during measurement, the singlechip controls the power switch circuit to be turned on through the corresponding I/O interface, and at the moment, the sensor voltage division circuit immediately outputs the corresponding voltage value at the moment;

s2, reading the single chip microcomputer through a built-in AD conversion module, and obtaining a current size value through scaling;

s3, the control module arranged in the single chip compares the size value with the size value read in the previous time to obtain a change amplitude value, the change amplitude difference value is compared with a preset threshold value, and if the change amplitude value exceeds the preset threshold value, the wireless module is controlled to send out data;

if the change amplitude value is smaller than the set threshold value, data does not need to be sent so as to reduce power consumption;

s4, after the measurement is completed, the single chip microcomputer controls the power switch circuit to be closed through the corresponding I/O interface, and the single chip microcomputer enters a low power consumption mode;

s5, timing the interval time by a wakeup module arranged in the single chip microcomputer, and waking up the interval time by a timer terminal in the single chip microcomputer after the interval time reaches the designated time;

and S6, repeating the steps S1-S5, realizing cyclic collection of data in a fixed period, and judging the transmission of the data based on the comparison of the measured sizes.

The invention has the beneficial effects that: the invention adopts the sensor to measure the voltage value of the corresponding circuit module, the singlechip controls whether the data of the wireless module is sent or not according to the real-time measured value and controls the on-off of the power switch circuit, thereby realizing the cyclic data acquisition with fixed period and judging the data sending based on the comparison of the measured dimension, realizing the automatic measurement and reducing the power consumption of the circuit.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic block diagram of a node of the present invention.

Detailed Description

As shown in fig. 1, a low power consumption expansion joint deformation monitoring wireless node includes:

the sensor is used for deformation measurement of the telescopic joint, namely measurement of the size, and a linear displacement sensor is adopted, and common linear displacement sensors comprise a resistance ruler based on a sliding rheostat, a photoelectric coding or a moire fringe grating ruler and the like. Considering that the measurement precision requirement of the telescopic joint is not high (the precision is in millimeter level, namely the actual requirement is met), the resistance ruler based on the sliding rheostat principle is adopted, the mechanical position memory effect is achieved, so that the measurement accuracy cannot be affected when the power supply is turned off, and the resistance ruler has the characteristic of low cost.

The singlechip for gather with send data to and the work of other modules of control (as the core of control), specifically, the singlechip includes:

the serial port communication module is used for being connected with the wireless module to realize data receiving and sending;

the AD conversion module is used for reading a corresponding voltage value output by the sensor and outputting the voltage value as a size value;

the control module compares the measured size value output by the AD conversion module with the previously measured size value to obtain a variation amplitude value, then compares the variation amplitude value with a preset threshold value, controls the wireless module to send data to a designated terminal if the variation amplitude value exceeds the threshold value, and does not need to send data if the variation amplitude value is smaller than the threshold value;

the I/O interface is used for being connected with the power switch circuit to control the on-off of the power switch circuit, and when the power switch circuit is closed, the single chip microcomputer enters a low power consumption mode;

and the awakening module is internally provided with a timing logic circuit, and awakens the singlechip to realize the cyclic acquisition and sending of data through an internal timer terminal of the singlechip after the singlechip enters a low power consumption mode to a set interval time.

Particularly, because the precision of an RC oscillating circuit in a common singlechip is not high, the accurate beat is realized by externally connecting a crystal oscillator clock circuit.

And the wireless module is used for receiving the measurement data sent by the singlechip and sending the measurement data in a wireless mode, and can adopt an LoRa technology.

The power supply module is used for outputting voltage to supply other modules to work; in this embodiment, the power module is a battery, and since the battery generates a voltage drop with use, the power conversion circuit is connected and matched with the power module to output a stable voltage to supply to each functional circuit.

The core device of the power switch circuit is an MOS FET relay, which is fast in switching and low in voltage drop, is connected with and controlled by a singlechip, is connected in series in the power circuit of a functional module to be controlled, and controls whether the corresponding module works or not.

A control method for a low-power consumption expansion joint deformation monitoring wireless node comprises the following steps:

s1, during measurement, the singlechip controls the power switch circuit to be turned on through the corresponding I/O interface, and at the moment, the sensor voltage division circuit immediately outputs the corresponding voltage value at the moment;

s2, reading the size value by the singlechip through the built-in AD conversion module, and obtaining the current size value through scaling;

s3, comparing the size value with the size value read last time by a control module arranged in the single chip microcomputer to obtain a change amplitude value, and comparing the change amplitude difference value with a preset threshold value;

if the change amplitude value exceeds a set threshold value, controlling the wireless module to send out data;

if the change amplitude value is smaller than the set threshold value, data does not need to be sent so as to reduce power consumption;

s4, after the measurement is finished, the singlechip controls the power switch circuit to be closed through the corresponding I/O interface, and the singlechip enters a low power consumption mode;

s5, timing the interval time by a wakeup module arranged in the single chip microcomputer, and waking up the interval time by a timer terminal in the single chip microcomputer after the interval time reaches the designated time;

and S6, repeating the steps S1-S5, realizing cyclic collection of data in a fixed period, and judging the transmission of the data based on the comparison of the measured sizes.

The invention adopts the sensor to measure the voltage value of the corresponding circuit module, the singlechip controls whether the data of the wireless module is sent or not according to the real-time measured value and controls the on-off of the power switch circuit, thereby realizing the cyclic data acquisition with fixed period and judging the data sending based on the comparison of the measured dimension, realizing the automatic measurement and reducing the power consumption of the circuit.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.