CN102881131A - Wireless data transmission method with low power consumption - Google Patents

Abstract

The present invention relates to the field of wireless data transmission, in particular to a low-power wireless data transmission method, characterized in that the wireless data transceiver module and the wireless data transmission module on the multi-channel acquisition device are independently controlled, and each wireless data transmission module The way of sending in turn is adopted, and by delaying the respective sending time, the wireless data signals of each acquisition device are sent in an orderly manner. The specific implementation steps are as follows: 1) within the receiving time before the data sending time, search whether Send a signal; 2) If a signal is received, adjust the time interval between this channel and the previous channel; 3) Repeat step 1) and step 2), and determine the transmission timing of other wireless data signals in turn. Compared with the prior art, the beneficial effects of the present invention are: 1) 99% of electric energy can be saved. 2) Powered by dry batteries, the application range is wider. 3) It has the characteristics of simple structure, convenient use, stability and reliability.

Description

Low power consumption wireless data transmission method

technical field

The invention relates to the field of wireless data transmission, in particular to a low power consumption wireless data transmission method.

Background technique

In recent years, the development of wireless data transmission is relatively fast. Due to the good isolation characteristics of the transmitted signal, it is used as a means of operation, maintenance and detection in power systems. It is generally used to judge whether the equipment is running by detecting the temperature of electrical contacts and electrical equipment. Normal, it is possible to carry out maintenance and troubleshooting in advance to prevent accidents and provide a technical guarantee for the reliable operation of the power system.

In a multi-point signal system, the same frequency is often used to send wireless data in sequence, and the receiving end sends different address codes, and calls the collection devices at each point to send data in turn, forming a multi-point device that responds to each other with the central data receiving device. An orderly communication system, which is a technical principle in routine use. This technology is widely used and mature, but the multi-point acquisition device is in the receiving state most of the time, waiting for the address signal sent by the central receiving device, judging whether the address signal of the call matches the address, and responding with the same address, and then The collected data signal is sent, so most of the time is in the waiting state for receiving, and 99% of the power consumption of the device is here. If dry battery power supply is adopted, this method cannot guarantee that the device can work reliably for a long time.

In actual work, the main power consumption of the wireless data transceiver module is in receiving letters. Although the instantaneous power consumption is not greater than sending letters (12mA for receiving letters and 18mA for sending letters in this device), the receiving time lasts for a long time, and almost all the time is waiting for receiving , consumes a lot of power. If the acquisition device does not use the receiving and responding method, but uses the sending method in turn, it will cause an out-of-control situation. Multiple sending ends will send out of order with the extension of time, and the signals will be superimposed and sent. The receiving end cannot receive correct data. There will be confusion, which is not allowed.

Contents of the invention

The purpose of the present invention is to provide a wireless data transmission method with low power consumption, which can reduce power consumption in the wireless transmission process of temperature detection, is suitable for the occasion of using dry battery power supply, shortens the waiting time for data reception, saves electric energy, and makes temperature detection Wider application.

In order to solve the problems of the technologies described above, the technical solution of the present invention is:

The low-power wireless data sending and receiving method, the wireless data receiving module and the wireless data sending module on the multi-channel acquisition device are independently controlled, and each wireless data sending module adopts the method of sending in turn, and by delaying the respective sending time, each The wireless data signal of the road acquisition device is sent in an orderly manner, and its specific implementation steps are as follows:

1) During the receiving time of 50-500mS before the transmission time point of the wireless data transmission module of each acquisition device, the wireless data receiving module of the acquisition device searches whether the previous wireless data transmission module sends a signal;

2) If the signal is received, adjust the time interval between the wireless data transmission module on the collection device and the wireless data transmission module of the previous collection device to prevent the two signals from superimposing each other;

3) Repeat step 1) and step 2), and then sequentially determine the transmission timing of the wireless data signals of other acquisition devices.

The time interval is affected by the time interval determined by the one acquisition device with the lowest clock frequency, and finally remains in a relatively stable state, so that the wireless data signals of each acquisition device do not interfere with each other at all.

Compared with the prior art, the beneficial effects of the present invention are: 1) By shortening the power consumption of the receiving waiting time, the energy-saving effect is very significant, and 99% of the power can be saved in this system, which can greatly prolong the battery life, The device can ensure long-term reliable operation. 2) Designed with low-consumption devices, it can be powered by dry batteries. Due to the wireless connection, it has a wider range of applications. 3) It has the characteristics of simple structure, convenient use, economical and applicable, stable and reliable.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of an acquisition device of the present invention;

Fig. 2 is a schematic diagram of the data sending and receiving sequence of the four-way acquisition device of the present invention;

Fig. 3 is a partial enlarged view of A in Fig. 2 .

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

See Fig. 1, it is the structure schematic diagram of the embodiment of acquisition device of the present invention, low-power single-chip microcomputer is connected with wireless data receiving module, detection circuit, wireless data transmission module and storage chip respectively, the wireless data receiving module and wireless data transmission module on the acquisition device They are independently controlled, and the data detected by the detection circuit is stored in the memory chip through the data processing of the single-chip microcomputer.

See Fig. 2 and Fig. 3, the timing diagram of the low-power wireless data sending and receiving method of the present invention, taking the four-way acquisition device as an example, each wireless data sending module adopts the mode of sending in turn, by delaying the respective sending time, to realize The wireless data signals of each acquisition device are sent in an orderly manner, and its specific implementation steps are as follows:

1) During the receiving time of 50-500mS before the transmission time point of the wireless data transmission module of each acquisition device, the wireless data receiving module of the acquisition device searches whether the previous wireless data transmission module sends a signal, and utilizes the dispersion of the frequency of multiple signals characteristics, slow changes between similar devices, small differences in frequency accuracy and frequency stability, and the deterministic condition of the sending time of this device, it is possible to search for various signals in a short time before the device sends;

2) If the previous signal is received, adjust the time interval between the wireless data transmission module on the acquisition device and the wireless data transmission module of the previous acquisition device to prevent the two signals from superimposing each other;

3) Repeat step 1) and step 2), and then sequentially determine the transmission timing of the wireless data signals of other acquisition devices.

Take the 4th wireless frequency transmitting device as an example, perform a reception within the range of t0=50-500mS, check whether there is a 3rd wireless signal near the sending time point of t4, if not, it indicates that the 3rd channel is compatible with The 4th signal has a certain time interval, the signal will not be superimposed, then continue to send the t4 signal; if the 3rd signal is received, it indicates that the interval between the 3rd and 4th signals is very close, and the sending time of the two signals Gradually approaching, it is possible to superimpose each other, and adjustments are required to prevent the signals from superimposing. Regardless of whether the signal of the third channel is lagging behind or the signal of the fourth channel is ahead, each acquisition device can only detect and adjust its own transmission time interval, that is, adjust the delay of the transmission of the fourth channel signal. There is a certain interval between the two signals , until the fourth device cannot detect the third signal within the range of t0. By repeating the above process, the signals of the third and fourth channels will never be superimposed. In the same way, it can be obtained that the time interval between the adjacent signals of the 1st, 2nd, 3rd, and 4th channels can realize that the signals will never be superimposed.

Since the 4 acquisition devices are independent of each other and cannot be controlled uniformly, the present invention adopts the power-on delay to control the sending and receiving work at different times, for example, the first delay is 10 minutes, the second delay is 30 minutes, and the third delay is 50 minutes. Minutes, the 4th channel is delayed for 70 minutes, and the time interval between them is about 20 minutes, so there is generally no signal superposition when starting up. Through the actual test, it can be known that the time interval of each signal transmission will continue to change, and finally the time interval of the system is affected by the time interval determined by the acquisition device with the lowest clock frequency, and finally remains in a relatively stable state, so that each acquisition The wireless data signals of the devices do not interfere with each other at all.

The communication mode that the system of the inventive method adopts is not access type, and the central receiving device only receives and does not send, and each collection device only uses very short receiving time to search whether there is a sending signal near the sending time point, due to the shortening of the receiving waiting time , the energy-saving effect is very significant.

Claims (2)

1. the wireless data transceiving method of low-power consumption, it is characterized in that, receive data by wireless module on the multi-path acquisition device and wireless data sending module be independent control respectively, each road wireless data sending module adopts the mode that sends in turn, by time-delay transmitting time separately, realize that each road harvester wireless data signal sends in an orderly manner, its specific implementation step is as follows:

1) in the time of reception of each road harvester 50-500mS before wireless data sending module transmitting time point, whether the last road of the receive data by wireless block search wireless data sending module of this road harvester transmitted signal;

2) if receive signal, then adjust the time interval that sends between the wireless data sending module and last road harvester wireless data sending module on this road harvester, prevent that two paths of signals from superposeing mutually;

3) circulation step 1) and step 2), and then determine successively the transmission timing of the wireless data signal of other each road harvesters.

2. the wireless data transceiving method of low-power consumption according to claim 1, it is characterized in that, the time interval that the described time interval is determined by a road minimum harvester of clock frequency affects, remain at last metastable state, make the complete non-interference of wireless data signal of each road harvester.

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