CN104484986A

CN104484986A - Data transmission method, wireless transmitting device and wireless receiving device

Info

Publication number: CN104484986A
Application number: CN201410637126.XA
Authority: CN
Inventors: 章昌焕; 喻娅君
Original assignee: AMT WIRELESS EUROPE; WUHAN AMATE TECHNOLOGY Co Ltd
Current assignee: AMT WIRELESS EUROPE; WUHAN AMATE TECHNOLOGY Co Ltd
Priority date: 2014-11-12
Filing date: 2014-11-12
Publication date: 2015-04-01
Also published as: WO2016074220A1

Abstract

The invention discloses a data transmission method, a wireless transmitting device and a wireless receiving device, and belongs to the data transmission field. The method comprises the following steps: acquiring monitoring data measured by a sensor; carrying out spread spectrum orthogonal coding and redundant coding on the monitoring data by a predetermined spread spectrum factor, a spread spectrum sequence algorithm and a redundant coding rate; and sending the coded monitoring data to the wireless receiving device. The spread spectrum orthogonal coding and redundant coding on the monitoring data are carried out, after the monitoring data is subjected to the combination coding way of spread spectrum orthogonal coding and redundant coding, a lot of redundant information is increased, and the communication channel communication reliability, the signal receiving sensitivity and the link circuit stability are greatly enhanced, so that the communication distance is greatly extended and is suitable for small-data-size and long-distance transmission.

Description

Data transmission method, wireless launcher and radio receiver

Technical field

The present invention relates to field of data transmission, particularly a kind of data transmission method, wireless launcher and radio receiver.

Background technology

Along with the development and progress of science and technology, people apply the acquisition that on-line monitoring technique realizes collection capacity in increasing scene.Such as, container, chill car, medical box, refrigerator-freezer, the large-scale temperature monitoring freezing storehouse etc., the remote meter reading of gas meter, water meter, illumination in agricultural greenhouse, P in soil H value, soil CO ₂concentration and temperature-humidity monitoring, the monitoring of power high voltage switch in-cabinet temperature, electric current and voltage.

In order to obtain these collection capacities, normally in monitored scene, corresponding sensor being installed, then the collection capacity that sensor obtains being outputted to host computer.But in a lot of scene, owing to limiting by environment or cost, be possiblely inconvenient to connect up.Therefore at these environment, data (collection capacity) transmission can only be realized by adopting the wireless mode such as zigbee or radio frequency (English: Radio Frequency, to be called for short RF).

When adopting wireless mode to carry out data transmission, in monitored scene, installing wireless launcher, installing radio receiver at far-end, wireless launcher relies on battery as power supply.

Realizing in process of the present invention, inventor finds that prior art at least exists following problem:

The wireless transmission such as zigbee or RF, apart from limited, affect the application of on-line monitoring technique.

Summary of the invention

In order to solve the problem of prior art, embodiments provide a kind of data transmission method, wireless launcher and radio receiver.Described technical scheme is as follows:

On the one hand, embodiments provide a kind of data transmission method, be applicable to wireless launcher, described method comprises:

Obtain the Monitoring Data that sensor records;

Predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out spread-spectrum orthogonal coding and redundancy encoding to described Monitoring Data;

Described Monitoring Data after coding is sent to described radio receiver.

In a kind of implementation of the embodiment of the present invention, described by coding after described Monitoring Data send to described radio receiver, comprising:

Periodically detect electromagnetic wave, detecting the described electromagnetic time interval is very first time length;

If the electromagnetic wave that described radio receiver is launched detected, then receive the instruction message of described electromagnetic transmission, described instruction message comprises fills field and inquiry field, described inquiry field sends to described radio receiver for the Monitoring Data of asking described wireless launcher and being recorded by sensor, and described filling field is used for making described instruction message send duration used and is equal to, or greater than described very first time length;

Described Monitoring Data after coding is sent to described radio receiver.

In the another kind of implementation of the embodiment of the present invention, described by coding after described Monitoring Data send to described radio receiver, comprising:

Adopt real-time lowest power that the described Monitoring Data after coding is sent to described radio receiver, the minimum wireless signal strength that actual wireless signal intensity, emissive power and described wireless launcher when described real-time lowest power is the Monitoring Data transmission after described wireless launcher is encoded according to former frame send needed for data calculates, wherein, actual wireless signal intensity/emissive power=minimum wireless signal strength/lowest power in real time.

In the another kind of implementation of the embodiment of the present invention, described method also comprises:

Periodically the described Monitoring Data after coding is sent to described radio receiver, the cycle sending described Monitoring Data is the second time span, and described second time span is greater than described very first time length; Or,

When producing wake-up signal, described Monitoring Data after coding is sent to described radio receiver, described wake-up signal is the value of the described Monitoring Data that more described sensor exports and the size of the threshold range preset, and produce when the value of described Monitoring Data exceeds described default threshold range.

On the other hand, the embodiment of the present invention additionally provides a kind of data transmission method, is applicable to radio receiver, and described method comprises:

Receive the data that wireless launcher sends;

The decoding data adopting predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to send described wireless launcher, obtains the Monitoring Data that sensor records.

On the other hand, the embodiment of the present invention additionally provides a kind of wireless launcher, and described device comprises:

Sensor;

Transceiver, for communicating with radio receiver;

Processor, for obtaining the Monitoring Data that described sensor records; Predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out spread-spectrum orthogonal coding and redundancy encoding to described Monitoring Data; By described transceiver, the described Monitoring Data after coding is sent to described radio receiver.

In a kind of implementation of the embodiment of the present invention, described processor, for periodically detecting electromagnetic wave by described transceiver, detecting the described electromagnetic time interval is very first time length;

Described processor, also for when the electromagnetic wave that described radio receiver is launched being detected, by the instruction message of electromagnetic transmission described in described transceivers, described instruction message comprises fills field and inquiry field, the Monitoring Data that described sensor records is sent to described radio receiver for asking described wireless launcher by described inquiry field, and described filling field is used for making described instruction message send duration used and is equal to, or greater than described very first time length;

By described transceiver, the described Monitoring Data after coding is sent to described radio receiver.

In the another kind of implementation of the embodiment of the present invention, described transceiver,

For adopting real-time lowest power, the described Monitoring Data after coding is sent to described radio receiver, the minimum wireless signal strength that actual wireless signal intensity, emissive power and described wireless launcher when described real-time lowest power is the Monitoring Data transmission after described wireless launcher is encoded according to former frame send needed for data calculates, wherein, actual wireless signal intensity/emissive power=minimum wireless signal strength/lowest power in real time.

In the another kind of implementation of the embodiment of the present invention, described processor, also for periodically the described Monitoring Data after coding being sent to described radio receiver by described transceiver, the cycle sending described Monitoring Data is the second time span, and described second time span is greater than described very first time length; Or,

When producing wake-up signal, by described transceiver, the described Monitoring Data after coding is sent to described radio receiver, described wake-up signal is the value of the described Monitoring Data that more described sensor exports and the size of the threshold range preset, and produce when the value of described Monitoring Data exceeds described default threshold range.

On the other hand, the embodiment of the present invention additionally provides a kind of radio receiver, and described device comprises:

Transceiver, for communicating with wireless launcher;

Processor, for the data sent by described transceivers wireless launcher;

The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:

By carrying out spread-spectrum orthogonal coding and redundancy encoding to Monitoring Data, Monitoring Data is after the coded system that spread-spectrum orthogonal coding and redundancy encoding combine, add a lot of redundant information, greatly strengthen the communication reliability of channel, signal receiving sensitivity and link stable, thus communication distance is extended greatly, be applicable to small data quantity long-distance transmissions.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the application scenarios figure that the embodiment of the present invention provides;

Fig. 2 is the data transmission method process flow diagram that the embodiment of the present invention one provides;

Fig. 3 is the data transmission method process flow diagram that the embodiment of the present invention two provides;

Fig. 4 is the data transmission method process flow diagram that the embodiment of the present invention three provides;

Fig. 5 is the structural representation of the wireless launcher that the embodiment of the present invention four provides;

Fig. 6 is the structural representation of the wireless launcher that the embodiment of the present invention five provides;

Fig. 7 is the structural representation of the wireless launcher that the embodiment of the present invention six provides;

Fig. 8 is the structural representation of the radio receiver that the embodiment of the present invention seven provides;

Fig. 9 is the structural representation of the radio receiver that the embodiment of the present invention eight provides; .

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

For the ease of the description of embodiment, below first simply introduce the application scenarios of the embodiment of the present invention.See Fig. 1, this scene comprises wireless launcher 10, radio receiver 20, local 30 and server 40, wherein wireless launcher 10 is connected by wireless transmission method with radio receiver 20, radio receiver 20 both can by local 30 and server 40 wired connection, radio receiver 20 also directly and server 40 wireless connections, wherein can be provided with sensor in wireless launcher 10.Concrete scheme is shown in following embodiment.

Embodiment one

Embodiments provide a kind of data transmission method, see Fig. 2, the method can be performed by wireless launcher, and the method comprises:

Step 101: obtain the Monitoring Data that sensor records.

Step 102: adopt predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to carry out spread-spectrum orthogonal coding and redundancy encoding to Monitoring Data.

Particularly, in step 102, both first can carry out spread-spectrum orthogonal coding to Monitoring Data, then redundancy encoding be carried out to the Monitoring Data after spread-spectrum orthogonal coding; Also first can carry out redundancy encoding to Monitoring Data, then spread-spectrum orthogonal coding be carried out to the Monitoring Data after redundancy encoding.

Particularly, step 102 comprises following process: first Monitoring Data is modulated into digital signal; Then predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out coded modulation with the frequency spectrum of broadened signal to above-mentioned digital signal.Then in subsequent step, then radiofrequency signal is become to send the signal madulation after broadening.And after radio receiver side receives radiofrequency signal, first be converted to intermediate frequency, then go despreading by predetermined spreading factor, frequency expansion sequence algorithm and the redundancy encoding rate identical with wireless launcher side, more original Monitoring Data output can be reverted to through demodulation.

Wherein, adopt predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to carry out coded modulation to above-mentioned digital signal, comprising:

Original spreading sequence is carried out spread spectrum by spreading factor, and frequency expansion sequence algorithm comprises original spreading sequence;

Sequence after spread spectrum is multiplied with digital signal (baseband signal), obtains pseudo-random code sequence;

Adopt above-mentioned redundancy encoding rate to carry out redundancy encoding to pseudo-random code sequence, obtain modulation signals.

In other words, coded modulation comprise spread-spectrum orthogonal coding and redundancy encoding two parts, below just to spread-spectrum orthogonal encode and redundancy encoding be described in detail:

The essence of spread-spectrum orthogonal coding is a kind of (N, m) coding, and the pseudo-random code that namely m position information code (Monitoring Data) is N by length represents.M position information code has M=2 ^mindividual state, is referred to as M system spread spectrum system, and M system spread spectrum system needs the long mutually orthogonal pseudo-random code c for N of M bar _i, i=0,1,2,3 ..., M-1 represents M state of m position information code, and M bar length is the pseudo-random code of N and M state of m position information code is one-to-one relationship.In actual implementation procedure, be multiplied with baseband signal (digital signal) by frequency expansion sequence (namely do mould two and add computing) obtains the long pseudo-random code for N, and after baseband signal spread spectrum, bandwidth obtains increase, and transmission range is farther.

Frequency expansion sequence can be calculated by predetermined spreading factor and frequency expansion sequence algorithm.Wherein need in frequency expansion sequence algorithm to define original spreading sequence.Such as, current spreading factor is 6, and original spreading sequence is 1111, be then 64 bits by original spreading sequence by every 1 bit expanded of spreading factor, be then multiplied with baseband signal, export the pseudo-random code that final length is N.

Redundancy encoding be actually to input data carries out encoding rate process, such as redundancy encoding rate be 4/6 namely input 4 codes time export 6 codes.Redundancy encoding rate is larger, and efficiency is higher.When channel quality is poor time, need to increase more redundant information to ensure that radio receiver can correct restituted signal, more redundant information means low encoding rate, and minimum is that 1 code needs increase by 1 redundanat code, i.e. 4/5 coding.When channel quality is good time, need the just energy demodulation of little redundancy check bit, just can improve encoding rate.System can select suitable encoding rate according to the change of channel, and the user that channel quality can be made so good obtains higher speed, improves the stability of communication.Redundancy encoding, by selecting suitable encoding rate, increases redundant information, such as, is encoded to 11101111 by 1101, enhances the communication reliability of channel, make transmission range farther.

Spread-spectrum orthogonal coding and the core concept of redundancy encoding treatment mechanism are, by applying these coded treatment mechanism, and reduction radio frequency practical communication speed, thus significantly raising radio transmission distance.

In traditional RF radio-frequency technique, adopt Gaussian Frequency Shift Keying (English: Gauss Frequency ShiftKeying more, be called for short: GFSK), frequency shift keying is (English: Frequency Shift Keying, be called for short: FSK) and scale-of-two on off keying (English: On-Off Keying, OOK) etc. be called for short: mode is modulated, receiving sensitivity is up to-122dBm, adjacent channel rejection ratio is less than 32dB, during based on 10mW peak RF emissive power, spacious transmission range reaches 700 ~ 800m.

And after carrying out spread-spectrum orthogonal coding and redundancy encoding, the receiving sensitivity of radio frequency can be made to reach-148dBm, and adjacent channel rejection ratio reaches 69dB, and during based on 10mW peak RF transmitted power, spacious transmission range reaches 3km simultaneously.Visible, although traffic rate has partial sacrifice after carrying out spread-spectrum orthogonal coding and redundancy encoding, but radio frequency communication distance and antijamming capability all significantly promote, these parameters determine the small data quantity remote-wireless data transmission that it can realize under complex environment, are particularly suitable for collection capacity (Monitoring Data) monitoring in some complicated place and transmission, such as: closed occupancy inside (container, chill car, medical box, refrigerator-freezer, large cold storage) temperature-humidity monitoring and transmission; The humiture of intensive community household internal; The remote meter reading of gas meter, water meter; The monitoring of illumination in agricultural greenhouse, P in soil H value, humiture, Soil microbes etc. and remote transmission; The on-line monitoring of power high voltage switch in-cabinet temperature, electric current, voltage and transmission etc.

Step 103: the Monitoring Data after coding is sent to radio receiver.

The embodiment of the present invention is by carrying out spread-spectrum orthogonal coding and redundancy encoding to Monitoring Data, Monitoring Data is after the coded system that spread-spectrum orthogonal coding and redundancy encoding combine, add a lot of redundant information, greatly strengthen the communication reliability of channel, signal receiving sensitivity and link stable, thus communication distance is extended greatly, be applicable to small data quantity long-distance transmissions.

Embodiment two

Embodiments provide a kind of data transmission method, see Fig. 3, the method can be performed by wireless launcher, and the method comprises:

Step 201: obtain the Monitoring Data that sensor records.

Further, the method can also comprise:

Before the Monitoring Data that acquisition sensor records, the type of the automatic determination and analysis sensor of wireless launcher, carries out interface switching, and sensor is connected with corresponding testing circuit.Thus realize different sensors and connect from different testing circuits, to complete the acquisition of Monitoring Data.Particularly, the type of the automatic determination and analysis sensor of wireless launcher comprises: when wireless launcher power-up initializing, (English: Micro Control Unit by the micro-control unit in wireless launcher, be called for short: MCU) control electronic switch and switch sensor institute connection circuit, notify which kind of interface MCU current sensor is by corresponding testing mechanism.Such as, MCU controls electronic switch and is connected with a small resistor by sensor, measures pressure drop simultaneously, as pressure drop is less, then substantially can judge that sensor is 4 ~ 20mA electric current loop interface sensor at small resistor two ends; Otherwise, as pressure drop is comparatively large, then tentatively can judge that sensor is voltage interface sensor or RS485 interface sensor, wherein, when detecting voltage and reaching 5V, can think that sensor is RS485 interface sensor, otherwise can think that sensor is voltage interface sensor.After detected corresponding sensor type, then carry out corresponding testing circuit switching, MCU is connected with sensor by correct interface.

By the application of this technical scheme, make wireless launcher can multiple main flow interface sensor on compatible market, to realize different types of Monitoring Data collection.

Step 202: adopt predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to carry out spread-spectrum orthogonal coding and redundancy encoding to Monitoring Data.

Particularly, in step 202, both first can carry out spread-spectrum orthogonal coding to Monitoring Data, then redundancy encoding be carried out to the Monitoring Data after spread-spectrum orthogonal coding; Also first can carry out redundancy encoding to Monitoring Data, then spread-spectrum orthogonal coding be carried out to the Monitoring Data after redundancy encoding.

Wherein, particularly, step 202 comprises following process: first Monitoring Data is modulated into digital signal; Then predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out coded modulation with the frequency spectrum of broadened signal to above-mentioned digital signal.Then in subsequent step, then radiofrequency signal is become to send the signal madulation after broadening.And after radio receiver side receives radiofrequency signal, first be converted to intermediate frequency, then go despreading by predetermined spreading factor, frequency expansion sequence algorithm and the redundancy encoding rate identical with wireless launcher side, more original Monitoring Data output can be reverted to through demodulation.

In traditional RF radio-frequency technique, adopt GFSK, FSK and OOK mode to modulate, receiving sensitivity is up to-122dBm, and adjacent channel rejection ratio is less than 32dB more, and during based on 10mW peak RF emissive power, spacious transmission range reaches 700 ~ 800m.

Step 203: adopt real-time lowest power that the Monitoring Data after coding is sent to radio receiver, the minimum wireless signal strength that actual wireless signal intensity, emissive power and wireless launcher when real-time lowest power is the Monitoring Data transmission after wireless launcher is encoded according to former frame send needed for data calculates, wherein, actual wireless signal intensity/emissive power=minimum wireless signal strength/lowest power in real time.

Wherein, minimum wireless signal strength refers to the minimum signal intensity required for wireless launcher transmission information, and this minimum wireless signal strength can be the effective value according to drawing after a large amount of simulation test.

Gather in scene in general Monitoring Data, although the position of wireless launcher is fixed, but the position of radio receiver is unfixed, or even be in movement (as being arranged in monitor vehicle), therefore the distance between wireless launcher and radio receiver is unknown in fact, so can by before sending one frame coding after Monitoring Data time, distance is calculated according to actual wireless signal intensity and emissive power, then adopt the minimum wireless signal strength of Distance geometry to calculate and send the required lowest power in real time of Monitoring Data, this real-time lowest power is adopted to send in the transmission of the Monitoring Data after next frame coding, thus the power consumption of wireless launcher can be reduced, make the average current <10uA under the duty of equipment, single battery can ensure that wireless launcher work is greater than 3 years.

Wherein, when when each transmission Monitoring Data, the Monitoring Data after the first frame coding both can adopt the power of systemic presupposition to send, and the real-time lowest power calculated according to last frame when once sending before also can adopting sends.Wherein, the power preset is the default power set in advance according to actual scene.

In the present embodiment, radio receiver is sent to realize in the following ways the Monitoring Data after coding in step 203:

Step one, periodically detect electromagnetic wave, to confirm that radio receiver is current whether at transmission instruction message, detecting the electromagnetic time interval is very first time length.

Wherein, detecting the electromagnetic time interval can be arranged according to actual needs, such as, be set to 6S.

When detecting electromagnetic wave, can determining according to predetermined idle sequence code that radio receiver is current whether at transmission instruction message, such as, when carrying 0XFF in the electromagnetic wave received, confirming that this electromagnetic wave is that radio receiver sends.

If step 2 detects the electromagnetic wave that radio receiver is launched, then receive the instruction message of electromagnetic transmission, instruction message comprises fills field and inquiry field, inquiry field sends to radio receiver for the Monitoring Data of asking wireless launcher and being recorded by sensor, fills field and is used for making instruction message send duration used and is equal to, or greater than very first time length.

Under normal circumstances, if want to realize two-way wireless communication, then need wireless launcher and radio receiver to be in wireless receiving state simultaneously, need when sending, to be switched to radio frequency when there being data and send state, but when wireless launcher and radio receiver are in wireless receiving state, electric current is comparatively large, and power consumption is higher.For radio receiver, because it can adopt external power supply to power, do not need the problem worrying that power consumption is high, but for wireless launcher, owing to being employing powered battery, so need to reduce the time that it is in wireless receiving state, to reduce power consumption.

Therefore, in the present embodiment, wireless launcher adopts periodically mode to detect electromagnetic wave, to carry out the reception of instruction message, thus decreases the time being in wireless receiving state, reduces power consumption.

In addition, the instruction message that radio receiver sends forms by filling field and inquiring about field, and wherein filling field has two effects: the first, and owing to inquiring about, field is too short may only have several bit, if only send inquiry field, easily cause the loss of instruction message, it two is, because wireless launcher is the reception periodically carrying out instruction message, if instruction message is too short, instruction message may be caused cannot to be transmitted wirelessly device receive (time as sent instruction message is between wireless launcher twice detection), and can increase by filling field the duration that instruction message sends needs, when this duration is equal to or greater than the wireless launcher detection electromagnetic time interval, the electromagnetic wave sending this instruction message be certain to be transmitted wirelessly device monitoring to, the instruction message that then radio receiver sends is certain to be received, and due to radio receiver be adopt external power supply, therefore the problem of power consumption need not be considered completely.

Wherein, fill field to fill by insignificant bit section, as a series of 0; And inquire about field and can represent with 4 bits, as 1010.

In other embodiments, instruction message can also be made up of filling field and setting field, sets field for revising the parameter on wireless launcher, as very first time length etc.

Step 3, by coding after Monitoring Data send to radio receiver.

In addition, this Monitoring Data can also be stored when sending Monitoring Data, in extreme cases, if because interference or radio receiver powered-off fault cause single data to send unsuccessfully, wireless launcher can when communication link recovers, the Monitoring Data of storage is resend to radio receiver, or carries out breakpoint transmission from beginning, failed position, fully to ensure the reliability that whole Monitoring Data is transmitted.

In order to the situation reducing above-mentioned re-transmission sends, the method can also comprise: before Monitoring Data sends, adopt frequency sweep listening mode to monitor communication channel, during if any identical frequency undesired signal, then automatic frequency-hopping carries out the transmission of Monitoring Data to adjacent channel.In addition, software also uses anticollision simultaneously and automatically evade algorithm, make communication link can keep reliable and stable, to ensure the reliability that whole Monitoring Data is transmitted.

Further, except when when receiving the instruction message of radio receiver transmission, carry out outside the transmission of Monitoring Data, the method can also comprise: periodically the Monitoring Data after coding is sent to radio receiver, the cycle sending Monitoring Data is the second time span, and the second time span is greater than very first time length; Or,

When producing wake-up signal, the Monitoring Data after coding is sent to radio receiver, wake-up signal compares the value of the Monitoring Data that sensor exports and the size of the threshold range preset, and produce when the value of Monitoring Data exceeds default threshold range.As, in Monitoring Data, temperature is 80 degree, and the threshold range arranged is for being no more than 70 degree, then now can produce wake-up signal, thus this Monitoring Data is sent to radio receiver.

Wherein, the second time span also can be arranged according to actual scene, such as 30 minutes or one hour.

Embodiment three

Embodiments provide a kind of data transmission method, see Fig. 4, the method can be performed by radio receiver, and the method comprises:

Step 301: receive the data that wireless launcher sends.

Radio receiver can also by the Monitoring Data that receives by general packet radio service technology (English: General Packet Radio Service, GPRS) etc. be called for short: long-distance transmissions mode sends to server.

Because the transmission range of RF limits, by GPRS, Monitoring Data is sent to server when hypertelorism, the region that server can be made to cover is enough large.

Step 302: the decoding data adopting predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to send wireless launcher, obtains the Monitoring Data that sensor records.

Further, the method can also comprise: send instruction message to wireless launcher, instruction message comprises fills field and inquiry field, inquiry field sends to radio receiver for the Monitoring Data of asking wireless launcher and being recorded by sensor, fills field and is used for making instruction message to send duration used being equal to, or greater than wireless launcher and detecting the electromagnetic time interval.

Under normal circumstances, if want to realize two-way wireless communication, then need wireless launcher and radio receiver to be in wireless receiving state simultaneously, need when sending, to be switched to radio frequency when there being data and send state, but when wireless launcher and radio receiver are in wireless receiving state, electric current is comparatively large, and power consumption is higher.For radio receiver, because it can adopt external power supply to power, do not need the problem worrying that power consumption is high, but for wireless launcher, owing to being employing powered battery, so need to reduce the time that it is in wireless receiving state, to reduce power consumption.Therefore, in the present embodiment, wireless launcher adopts periodically mode to detect electromagnetic wave, to carry out the reception of instruction message, thus decreases the time being in wireless receiving state, reduces power consumption.The instruction message that radio receiver sends forms by filling field and inquiring about field, wherein fill field and have two effects: the first, owing to inquiring about, field is too short may only have several bit, if only send inquiry field, easily causes the loss of instruction message, it two is, because wireless launcher is the reception periodically carrying out instruction message, if instruction message is too short, instruction message may be caused cannot to be transmitted wirelessly device receive (time as sent instruction message is between wireless launcher twice detection), and can increase by filling field the duration that instruction message sends needs, when this duration is equal to or greater than the wireless launcher detection electromagnetic time interval, the electromagnetic wave sending this instruction message be certain to be transmitted wirelessly device monitoring to, the instruction message that then radio receiver sends is certain to be received, and due to radio receiver be adopt external power supply, therefore the problem of power consumption need not be considered completely.

Embodiment four

Embodiments provide a kind of wireless launcher, see Fig. 5, this device comprises:

Sensor 401;

Transceiver 402, for communicating with radio receiver;

Processor 403, for obtaining the Monitoring Data that sensor 401 records; Predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out spread-spectrum orthogonal coding and redundancy encoding to Monitoring Data; By transceiver 402, the Monitoring Data after coding is sent to radio receiver.

Particularly, processor 403 both first can carry out spread-spectrum orthogonal coding to Monitoring Data, then carried out redundancy encoding to the Monitoring Data after spread-spectrum orthogonal coding; Also first can carry out redundancy encoding to Monitoring Data, then spread-spectrum orthogonal coding be carried out to the Monitoring Data after redundancy encoding.

Wherein, processor 403 may be used for: first Monitoring Data is modulated into digital signal; Then predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out coded modulation with the frequency spectrum of broadened signal to above-mentioned digital signal.Then in subsequent step, then radiofrequency signal is become to send the signal madulation after broadening.And after radio receiver side receives radiofrequency signal, first be converted to intermediate frequency, then go despreading by predetermined spreading factor, frequency expansion sequence algorithm and the redundancy encoding rate identical with wireless launcher side, more original Monitoring Data output can be reverted to through demodulation.

Wherein, adopt predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to carry out coded modulation to above-mentioned digital signal, processor 403 can adopt following manner to realize, and namely processor 403 can be used for:

In traditional RF radio-frequency technique, adopt the modes such as GFSK, FSK and OOK to modulate, receiving sensitivity is up to-122dBm more, and adjacent channel rejection ratio is less than 32dB, and during based on 10mW peak RF emissive power, spacious transmission range reaches 700 ~ 800m.

Embodiment five

Embodiments provide a kind of wireless launcher, see Fig. 6, this device comprises:

Sensor 501;

Transceiver 502, for communicating with radio receiver;

Processor 503, for obtaining the Monitoring Data that sensor 501 records; Predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out spread-spectrum orthogonal coding and redundancy encoding to Monitoring Data; By transceiver 502, the Monitoring Data after coding is sent to radio receiver.

Particularly, processor 503 both first can carry out spread-spectrum orthogonal coding to Monitoring Data, then carried out redundancy encoding to the Monitoring Data after spread-spectrum orthogonal coding; Also first can carry out redundancy encoding to Monitoring Data, then spread-spectrum orthogonal coding be carried out to the Monitoring Data after redundancy encoding.

Wherein, processor 503 may be used for: first Monitoring Data is modulated into digital signal; Then predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out coded modulation with the frequency spectrum of broadened signal to above-mentioned digital signal.Then in subsequent step, then radiofrequency signal is become to send the signal madulation after broadening.And after radio receiver side receives radiofrequency signal, first be converted to intermediate frequency, then go despreading by predetermined spreading factor, frequency expansion sequence algorithm and the redundancy encoding rate identical with wireless launcher side, more original Monitoring Data output can be reverted to through demodulation.

Wherein, adopt predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to carry out coded modulation to above-mentioned digital signal, processor 503 can adopt following manner to realize, and namely processor 503 can be used for:

In the present embodiment, processor 503, may be used for periodically detecting electromagnetic wave by transceiver 502, and detecting the electromagnetic time interval is very first time length;

When the electromagnetic wave that radio receiver is launched being detected, receive the instruction message of electromagnetic transmission, instruction message comprises fills field and inquiry field, inquiry field sends to radio receiver for the Monitoring Data of asking wireless launcher and being recorded by sensor, fills field and is used for making instruction message send duration used and is equal to, or greater than very first time length; Obtain the Monitoring Data that sensor records, and by transceiver 502, the Monitoring Data after coding is sent to radio receiver.

Processor 503, can the type of determination and analysis sensor automatically when obtaining the Monitoring Data that sensor records, and carries out interface switching, thus realizes different sensors and connect from different testing circuits, to complete the acquisition of Monitoring Data.Particularly, processor 503 can adopt MCU to realize, namely, when wireless launcher power-up initializing, control electronic switch by the MCU in wireless launcher and switch sensor institute connection circuit, notify which kind of interface MCU current sensor is by corresponding testing mechanism.Such as, MCU controls electronic switch and is connected with a small resistor by sensor, measures pressure drop simultaneously, as pressure drop is less, then substantially can judge that sensor is 4 ~ 20mA electric current loop interface sensor at small resistor two ends; Otherwise, as pressure drop is comparatively large, then tentatively can judge that sensor is voltage interface sensor or RS485 interface sensor, wherein, when detecting voltage and reaching 5V, can think that sensor is RS485 interface sensor, otherwise can think that sensor is voltage interface sensor.After detected corresponding sensor type, then carry out corresponding testing circuit switching, MCU is connected with sensor by correct interface.

In the present embodiment, transceiver 502, for adopting real-time lowest power, the Monitoring Data after coding is sent to radio receiver, the minimum wireless signal strength that actual wireless signal intensity, emissive power and wireless launcher when real-time lowest power is the Monitoring Data transmission after wireless launcher is encoded according to former frame send needed for data calculates, wherein, actual wireless signal intensity/emissive power=minimum wireless signal strength/lowest power in real time.

Wherein, minimum wireless signal strength refers to the minimum signal intensity required for wireless launcher transmission information.

In addition, this Monitoring Data can also be stored in storer 504 when sending Monitoring Data, in extreme cases, if because interference or radio receiver powered-off fault cause single data to send unsuccessfully, wireless launcher can when communication link recovers, the Monitoring Data be stored in storer 504 is resend to radio receiver, or carries out breakpoint transmission from beginning, failed position, fully to ensure the reliability that whole Monitoring Data is transmitted.

In order to the situation reducing above-mentioned re-transmission sends, processor 503, also for adopting frequency sweep listening mode to monitor communication channel before Monitoring Data sends, during if any identical frequency undesired signal, then automatic frequency-hopping carries out the transmission of Monitoring Data to adjacent channel.In addition, software also uses anticollision simultaneously and automatically evade algorithm, make communication link can keep reliable and stable, to ensure the reliability that whole Monitoring Data is transmitted.

Further, processor 503, also for periodically the Monitoring Data after coding being sent to radio receiver by transceiver 502, the cycle sending Monitoring Data is the second time span, and the second time span is greater than very first time length; Or,

When producing wake-up signal, by transceiver 502, the Monitoring Data after coding is sent to radio receiver, wake-up signal compares the value of the Monitoring Data that sensor exports and the size of the threshold range preset, and produce when the value of Monitoring Data exceeds default threshold range.

Embodiment six

Embodiments provide a kind of wireless launcher, see Fig. 7, this device can comprise following one or more assembly: the assemblies such as processor 601, storer 602, transceiver 603, battery 604, voltage monitoring unit 605, Power Management Unit 606, sensor 607, interface switching control circuit 608.These assemblies are communicated by one or more bus.It will be understood by those skilled in the art that the structure of the mobile terminal shown in figure does not form limitation of the invention, it both can be busbar network, also can be hub-and-spoke configuration, can also comprise the parts more more or less than diagram, or combine some parts, or different parts are arranged.

Wherein, storer 602 is for storing computer executed instructions, processor 601 is connected by bus with storer 602, when wireless launcher runs, the computer executed instructions that processor 601 execute store 602 stores, to make the data transmission method of wireless launcher execution as described in embodiment one or two.

Particularly, the Monitoring Data that records for obtaining sensor of processor 601; Predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate is adopted to carry out spread-spectrum orthogonal coding and redundancy encoding to Monitoring Data; By transceiver, the Monitoring Data after coding is sent to radio receiver

Further, processor 601 can also be used for periodically detecting electromagnetic wave, and detecting the electromagnetic time interval is very first time length;

If the electromagnetic wave that radio receiver is launched detected, then receive the instruction message of electromagnetic transmission, instruction message comprises fills field and inquiry field, inquiry field sends to radio receiver for the Monitoring Data of asking wireless launcher and being recorded by sensor, fills field and is used for making instruction message send duration used and is equal to, or greater than very first time length;

By transceiver, the Monitoring Data after coding is sent to radio receiver.

When obtaining the Monitoring Data that sensor records, processor 601 can the type of determination and analysis sensor automatically, interface switching control circuit 608 carries out interface switching under controlling at processor 601, is connected by different sensors, to complete the acquisition of Monitoring Data from different testing circuits.Particularly, processor 601 can be MCU, when wireless launcher power-up initializing, switch sensor 607 connection circuits by the electronic switch in the MCU control interface commutation circuit 608 in wireless launcher, notify which kind of interface MCU current sensor is by corresponding testing mechanism.Such as, MCU controls electronic switch and is connected with a small resistor by sensor, measures pressure drop simultaneously, as pressure drop is less, then substantially can judge that sensor is 4 ~ 20mA electric current loop interface sensor at small resistor two ends; Otherwise, as pressure drop is comparatively large, then tentatively can judge that sensor is voltage interface sensor or RS485 interface sensor, wherein, when detecting voltage and reaching 5V, can think that sensor is RS485 interface sensor, otherwise can think that sensor is voltage interface sensor.After detected corresponding sensor type, then carry out corresponding testing circuit switching, MCU is connected with sensor by correct interface.

Particularly, transceiver 603 can be used for adopting real-time lowest power that the Monitoring Data after coding is sent to radio receiver, the minimum wireless signal strength that actual wireless signal intensity, emissive power and wireless launcher when real-time lowest power is the Monitoring Data transmission after wireless launcher is encoded according to former frame send needed for data calculates, wherein, actual wireless signal intensity/emissive power=minimum wireless signal strength/lowest power in real time.

This Monitoring Data can also be stored in the memory 602 when sending Monitoring Data, in extreme cases, if because interference or radio receiver powered-off fault cause single data to send unsuccessfully, wireless launcher can when communication link recovers, the Monitoring Data of storage is resend to radio receiver, or carry out breakpoint transmission from beginning, failed position, fully to ensure the reliability that whole Monitoring Data is transmitted.

In order to the situation reducing above-mentioned re-transmission sends, processor 601 can also adopt frequency sweep listening mode to monitor communication channel before Monitoring Data sends, and during if any identical frequency undesired signal, then automatic frequency-hopping carries out the transmission of Monitoring Data to adjacent channel.In addition, software also uses anticollision simultaneously and automatically evade algorithm, make communication link can keep reliable and stable, to ensure the reliability that whole Monitoring Data is transmitted.

Further, processor 601 can be used for periodically the Monitoring Data after coding being sent to radio receiver, and the cycle sending Monitoring Data is the second time span, and the second time span is greater than very first time length; Or, when producing wake-up signal, Monitoring Data after coding is sent to radio receiver, and wake-up signal compares the value of the Monitoring Data that sensor exports and the size of the threshold range preset, and produce when the value of Monitoring Data exceeds default threshold range.

In addition, voltage monitoring unit 605 and Power Management Unit 606 are respectively used to monitor battery 604 and manage.

Embodiment seven

Embodiments provide a kind of radio receiver, see Fig. 8, this device comprises:

Transceiver 701, for communicating with wireless launcher;

Processor 702, for receiving the data that wireless launcher sends by transceiver 701;

The decoding data adopting predetermined spreading factor, frequency expansion sequence algorithm and redundancy encoding rate to send wireless launcher, obtains the Monitoring Data that sensor records.

Further, processor 702 can also be used for sending instruction message by transceiver 701 to wireless launcher, instruction message comprises fills field and inquiry field, inquiry field sends to radio receiver for the Monitoring Data of asking wireless launcher and being recorded by sensor, fills field and is used for making instruction message to send duration used being equal to, or greater than wireless launcher and detecting the electromagnetic time interval.

Embodiment eight

Embodiments provide a kind of radio receiver, see Fig. 9, this device can comprise following one or more assembly: processor 801, storer 802, transceiver 803, input block 804, display unit 805, GPRS unit 806, GPS (English: Global Positioning System, be called for short: the GPS) assembly such as unit 807, battery 808, Charge Management unit 809, Power Management Unit 810, external power interface 811, detection of power loss unit 812, acousto-optic warning unit 813, communication interface 814.These assemblies are communicated by one or more bus.It will be understood by those skilled in the art that the structure of the mobile terminal shown in figure does not form limitation of the invention, it both can be busbar network, also can be hub-and-spoke configuration, can also comprise the parts more more or less than diagram, or combine some parts, or different parts are arranged.

Wherein, storer 802 is for storing computer executed instructions, processor 801 is connected by bus with storer 802, when radio receiver runs, the computer executed instructions that processor 801 execute store 802 stores, to make the data transmission method of radio receiver execution as described in embodiment three.

Particularly, processor 801 is for receiving the data of wireless launcher transmission by transceiver 803;

Further, processor 801 can also be used for sending instruction message by receiving device 803 to wireless launcher, instruction message comprises fills field and inquiry field, inquiry field sends to radio receiver for the Monitoring Data of asking wireless launcher and being recorded by sensor, fills field and is used for making instruction message to send duration used being equal to, or greater than wireless launcher and detecting the electromagnetic time interval.

In the present embodiment, input block 804 for obtaining the input such as user key-press, voice information, to obtain instruction message.

In the present embodiment, display unit 805 shows the Monitoring Data received.

In the present embodiment, GPRS unit 806 is for sending to server by the Monitoring Data received by GPRS transmission mode.

In the present embodiment, detection of power loss unit 812 is for external power supply whether power-off being detected, when external power supply power-off, processor 801 can control radio receiver and reduce power consumption, such as, close the modules such as display unit 805, GPRS unit 806 and GPS unit 807.

In the present embodiment, when radio receiver is in movement, GPS unit 807 can be used for carrying out satnav to radio receiver.

In the present embodiment, Charge Management unit 809 and Power Management Unit 810 are for managing the charging of battery 808 and use.

In the present embodiment, external power interface 811 can be used for being connected with external power supply.

In the present embodiment, processor 801 controls acousto-optic warning unit 813 and reports to the police when Monitoring Data exceedes respective threshold, thus reminds staff.

In the present embodiment, communication interface 814 can be used for being connected with local, with transmission of monitoring data.

It should be noted that: the wireless launcher that above-described embodiment provides and radio receiver are when transmitting data, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, inner structure by equipment is divided into different functional modules, to complete all or part of function described above.In addition, the wireless launcher that above-described embodiment provides and radio receiver and data transmission method embodiment belong to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a data transmission method, is characterized in that, is applicable to wireless launcher, and described method comprises:

Obtain the Monitoring Data that sensor records;

Described Monitoring Data after coding is sent to described radio receiver.

2. method according to claim 1, is characterized in that, described by coding after described Monitoring Data send to described radio receiver, comprising:

Described Monitoring Data after coding is sent to described radio receiver.

3. method according to claim 1 and 2, is characterized in that, described by coding after described Monitoring Data send to described radio receiver, comprising:

4. method according to claim 1 and 2, is characterized in that, described method also comprises:

5. a data transmission method, is characterized in that, is applicable to radio receiver, and described method comprises:

Receive the data that wireless launcher sends;

6. a wireless launcher, is characterized in that, described device comprises:

Sensor;

Transceiver, for communicating with radio receiver;

7. device according to claim 6, is characterized in that, described processor, and for periodically detecting electromagnetic wave by described transceiver, detecting the described electromagnetic time interval is very first time length;

8. the device according to claim 6 or 7, is characterized in that, described transceiver,

9. the device according to claim 6 or 7, it is characterized in that, described processor, also for periodically the described Monitoring Data after coding being sent to described radio receiver by described transceiver, the cycle sending described Monitoring Data is the second time span, and described second time span is greater than described very first time length; Or,

10. a radio receiver, is characterized in that, described device comprises:

Transceiver, for communicating with wireless launcher;

Processor, for the data sent by described transceivers wireless launcher;