CN104158598A - Passive and wireless switching value status transmitting method and apparatus - Google Patents
Passive and wireless switching value status transmitting method and apparatus Download PDFInfo
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- CN104158598A CN104158598A CN201410412330.1A CN201410412330A CN104158598A CN 104158598 A CN104158598 A CN 104158598A CN 201410412330 A CN201410412330 A CN 201410412330A CN 104158598 A CN104158598 A CN 104158598A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention relates to the field of wireless information transmission, especially relates to passive and wireless switching value status transmitting method and apparatus. A sound wave sending apparatus encodes switching value channel and status information through utilizing a time sequence coding technique, and broadcasts sound wave signals representing the switching value status into the air by air bags; after receiving the sound wave signals, a sound sensitive device filters the sound wave signals and conducts AD conversion so as to enter a DSP module for decoding process, obtains binary codes in a specific form and displays by a display module or transfers to an upper computer for processing through a communication technique. The present invention realizes the wireless and passive transmission of single-switching value channels and multi-switching value channels, facilitates the implementation in industrial places which are difficult for wiring and unable to be monitored by labor, can isolate electromagnetic interference from other parts in the switching value transmitting process and the data loss caused by cable short circuit and can realize energy conservation and environment protection at the same time as the sending end is passively powered.
Description
Technical field
The present invention relates to wireless information transfer field, particularly relate to a kind of on-off state transmission method and device of passive and wireless.
Background technology
In industry spot, usually need to gather on-off state, and be delivered to man-machine interface, so that important informations such as the equipment that the obtains operation that staff can be accurately real-time, environmental parameter, security alarm, this has proposed very high requirement to the accuracy of data and real-time.At present, industry spot is all to transmit by telecommunication cable or radio signal switch amount state.But because industry spot situation is complicated, there is difficult wiring in some areas, situation about manually cannot monitor, and also industry spot communication protocol is complicated, while utilizing cable transmission, various wired and communication modes are easy to crosstalk mutually, and data are easy to be subject to interference in various degree in transmitting procedure; And the frequent disconnected core that can cause cable when many operational outfits and cable move simultaneously, affects the transmission of signal.And while utilizing radio output signal, can produce again in signal communication process the situation that the increase with distance decays, be unfavorable for the remote transmission of signal.Meanwhile, the switching value number of signals that industry spot needs is huge, if the send and receive of each switching value signal configures power supply, easily causes unnecessary energy waste.
For above-mentioned defect, find a kind of wireless switching amount state transfer, method that simultaneously again can energy savings is imperative.The present invention can be complicated for this class operational environment in well, in tower, and difficult wiring manually cannot enter the industry spot of exploration, favourable to the transmission of the signals such as its internal switch amount signal, alarm signal.
Summary of the invention
The object of the invention is to, a kind of on-off state passive and wireless transmission method and device are provided, the problem existing for solving existing on-off state process of transmitting, improves reliability and accuracy that switching value transmits.
For achieving the above object, the present invention proposes a kind of wireless passive switch amount state transfer device, comprise switching value sound wave dispensing device, switching value sound wave receiving system;
Described switching value sound wave dispensing device comprises connecting rod, two flexible members, two pistons, two air bags, two blow guns and two groups of reeds; Different two flexible members of length are the parallel two ends that are installed on connecting rod respectively; Two pistons are connected with two flexible member other ends respectively; Within two air bags lay respectively at the scope that the piston under flexible member effect can arrive; Two blow guns are positioned at two air bag gas outlets accordingly, and two groups of reeds are positioned at blow gun place accordingly; Piston the drive of connecting rod and flexible member next first after one towards or deviate from air pocket motion, make air bag compression or expansion, the air-flow in air bag is blown out or is sucked by suction nozzle, air-flow drives reed vibrates to send one group of acoustic signals;
Switching value sound wave receiving system comprises connected successively acoustic sensor, filter, AD converter, DSP and microprocessor.
One group of reed comprises an air-breathing sounding reed and an air blowing sounding reed, and air-breathing sounding reed is identical with air blowing sounding reed frequency; Specifications parameter difference between two groups of reeds causes frequency values not identical.
The specifications parameter of described reed comprises reed material, reed shape, reed thickness, length of spring leaf, the distance between reed stiff end and inflection point.
Near reed, place the acoustic resonator that natural frequency is identical with reed frequency, by resonance, make sound strengthen amplifying.
DSP or microprocessor module or host computer connect alarm device, set in advance alert consitions, and when on-off state meets alert consitions, alarm device sends alarm signal; Described alert consitions is the particular state of single switch amount, the variable condition of single switch amount, the combined state of a plurality of switching values, or the single or multiple variable condition of the interior switching value of set time section.
Wireless passive switch amount state transfer device is applied to the industry spot of complex environment, in the position that needs pilot switch amount signal and alarm signal, lay sound wave dispensing device, and at well head or tower bottom, sound wave receiving system is installed, sound wave dispensing device constantly transmits sound wave or the alarm signal with switching value information, by the sound wave receiving system at the bottom of well head or tower, receive acoustic signals, it is decoded and sends on-off state information to host computer, thus realize in well or tower in the transmission of switching value signal and alarm signal.
Wireless passive switch amount state transfer device is applied to calculate seat in classroom and uses number, to judge messenger's quantity; Sound wave dispensing device is placed under the seat of seat in classroom, seat is used and does not use these two states corresponding to two states of switching value, by the processing of sound wave receiving system and host computer, realizes classroom demographics.
A wireless passive switch amount state transfer method, comprises the code sending method of sound wave transmitting terminal and the receive decoding method of sound wave receiving terminal;
The code sending method of described sound wave transmitting terminal, comprises the following steps:
Step 101, definite number of channels x that needs the switching value of sign, wherein, x is natural number and x >=1;
Step 102, according to the number of channels of switching value, sets up high-frequency signal group and low frequency signal group; High-frequency signal group is consistent with reed vibrates audible frequency with signal frequency value in low frequency signal group;
Step 103, determines high-frequency signal group medium-high frequency sine wave signal quantity m according to number of channels x, and low frequency signal group medium and low frequency sine wave signal quantity n; The value of m and n meets the < x of m * n > x and (m-1) * n < x and m * (n-1); Wherein, m, n are natural number and m >=1, n >=1;
Step 104, for the switching value of different passages is distributed a class frequency, a described class frequency comprises two frequency signals, is selected from high-frequency signal group and/or low frequency signal group; The described class frequency that the switching value of different passages is distributed is different;
Step 105, because flexible member length is different, causes it to drive piston action different in the sequencing of air bag, makes first compression or the expansion after of air bag one, and the piston that first acts on air bag first fails, after fail after acting on the piston of air bag; Air-flow in air bag is blown out or is sucked by suction nozzle, and air-flow drives the acoustic signals that sends described two frequencies after reed vibrates one first;
Step 106, the transmission of two frequency acoustic signals starts when different and stops when different, must cause a transmission cycle to be divided into three phases, and two frequency acoustic signals occupy respectively in a signal transmission cycle continuously but not identical two sections;
Step 107, in use signal transmission cycle, the different transmission sequences of two frequency signals characterize " 0 " and " 1 " of on-off state information; With the frequency values of two frequency signals, characterize switching value channel information;
The receive decoding method of described and sound wave receiving terminal, comprises the following steps:
Step 201, matching and decoding frequency used is identical with the frequency in low frequency signal group with the high-frequency signal group who selects in coding;
Step 202, the encoded acoustic signals transmitting in described acoustic sensor admission of air, is translated into the signal of telecommunication, and filter filters out the acoustic signals of the characteristic frequency in acoustic signals, by sending DSP after AD converter to, processes,
Step 203, with respect to the three phases of signal transmission cycle, DSP module is translated into input signal the binary code of three groups, every group m+n+2 position form; M position continuous in every group of binary code is corresponding one by one with m high_frequency sine wave signal, and continuous n position is corresponding one by one with n low-frequency sine signal, and all the other two are respectively high frequency flag position and low frequency flag bit, and wherein, m, n are natural number and m >=1, n >=1;
Step 204, while not receiving signal, by whole figure place resets or the set of the binary code of every group of m+n+2 position;
Step 205, in step 204 during by whole figure place reset of binary code: the signal of resolving each stage, the frequency information comprising in analytic signal, when described frequency information being detected and only comprise a high fdrequency component, by the correspondence position " 1 " in the m position of this high fdrequency component, and by high frequency flag place value " 1 "; When described frequency information being detected and only comprise a low frequency component, by the correspondence position " 1 " in the n position of this low frequency component, and by low frequency sign place value " 1 "; When described frequency information being detected and comprise a high fdrequency component and a low frequency component, by the correspondence position " 1 " in the n position of the corresponding position in the m position of this high fdrequency component and this low frequency component, and by high frequency flag position and the set of low frequency flag bit;
In step 204 during by whole figure place set of binary code, its resolving with by whole figure place resets of binary code, just by position reset corresponding to frequency component;
Step 206, comprehensive relatively three groups of binary codes, according to the information of the high frequency flag position in three groups of binary codes and low frequency flag bit, the transmission sequence of judgement high_frequency sine wave signal and low-frequency sine signal, and then obtain " 0 " and " 1 " that its different transmission sequence characterizes on-off state information;
Step 207, judges high fdrequency component in three groups of binary codes and the frequency values of low frequency component, judges the switching value channel information that this class frequency value characterizes.
Signal frequency value in described high-frequency signal group and low frequency signal group, determines according to the actual audible frequency value of selected reed; Or according to preassigned signal frequency value in high-frequency signal group and low frequency signal group, adjust reed parameter, and then adjust its audible frequency.
Switching value channel information and state information show by display module or send host computer to by the communication technology to be processed; Host computer to the binary code of described particular form store, demonstration or reminder alarm.
The invention has the beneficial effects as follows and be conducive in difficult wiring, the industrial occasions that manually cannot monitor is implemented, the loss of data causing from otherwise electromagnetic interference and electric discontinuity of cable in can isolating switch amount signals transmission, because transmitting terminal is passive power supply, can realize energy-conserving and environment-protective simultaneously.
Accompanying drawing explanation
Fig. 1 is sounding module operation principle schematic diagram;
Fig. 2 is one-way switch amount state passive and wireless transmission system structure chart;
Fig. 3 is multi-way switching values state passive and wireless transmission system structure chart;
Fig. 4 is that on-off state is " 1 " coding schematic diagram;
Fig. 5 is that on-off state is " 0 " coding schematic diagram;
Fig. 6 is sound wave receipt decoding flow chart.
Number in the figure: 1-adjustable piston device, 2-connecting rod, 3-composite air bag, 4-blow gun, 5-reed.
Embodiment
The present invention proposes a kind of wireless passive switch amount state transfer method and device.Below in conjunction with accompanying drawing and specific embodiments, this invention is described in further details.
As shown in Figure 1, be sound-producing device operation principle schematic diagram.
Sound-producing device shown in Fig. 1 comprises adjustable piston device 1,4, two groups of reeds 5 of 3, two blow guns of 2, two air bags of connecting rod.Every group of reed comprises that an air blowing sounding reed and one are air-breathing sounding reeds.Adjustable piston device 1 comprises two pistons, is connected respectively by two different spring or expansion links of length with connecting rod 2, makes two piston initial positions different; Each air bag 3 comprises 1 blow gun 4, and reed 5 is positioned at the place, gas outlet of blow gun 4.Can the placement acoustic resonator identical with reed 5 vibration frequencies with natural frequency near reed 5, by resonating, make sound strengthen amplifying.
When on-off state changes, drive connecting rod 2 to exert pressure to piston 1, force the gas in piston 1 compression bladder 3, the gas in air bag 3 blows out by blow gun 4, makes reed 5 vibrations in blow gun 4 exits, sends the audio signal of certain frequency.By changing the give vent to anger size of bore and the specification of reed 5 of blow gun 4, produce the acoustic signals of different frequency.Because two piston initial positions are different, the time order and function of its compressing or release air bag 3 sounding is also different.
Suppose that right hand piston 1 and air bag 3 spacings are short, left hand piston 1 is long with air bag 3 spacings, and reed 5 vibrations of right side air bag 3 send high-frequency signal, and the reed 5 of left side air bag 3 vibrates and sends low frequency signal.
When connecting rod 2 drives piston 1 towards the direction motion of air bag 3, first right hand piston 1 contacts and oppresses right side air bag 3, and now whole sound-producing device only sends high-frequency signal; When connecting rod 2 continues towards air bag 3 motions, right side reed 5 continues sounding, and left hand piston 1 starts to contact and oppresses left side air bag 3 simultaneously, and now whole sound-producing device sends the composite signal of high and low frequency; When connecting rod 2 continues towards air bag 3 motions, right hand piston 1 is discharged the air in right side air bag 3 substantially, and the sounding of right side reed 5 stops, and left hand piston 1 continues compressing left side air bag 3, maintain left side reed 5 and continue sounding, now whole sound-producing device only sends low frequency signal.When piston stop motion or left side air bag air are discharged substantially, whole device stops sounding.
When connecting rod 2 drives piston 1 towards the direction motion away from air bag 3, left hand piston 1 is first away from left side air bag 3, and the air-breathing expansion of air bag 3 causes left side reed 5 to vibrate, and now whole sound-producing device only sends low frequency signal; When connecting rod 2 continues away from air bag 3 motions, left side reed 5 continues to send low-frequency sound wave, right hand piston 1 starts away from right side air bag 3 simultaneously, and air bag air-breathing expansion in right side causes right side reed 5 to send high frequency sound wave, and now whole sound-producing device sends the composite signal of low frequency and high frequency; When connecting rod 2 continues away from air bag 3 motions, left side air bag restores to the original state, and left hand piston 1 no longer contacts left side air bag, left side reed 5 stops sounding, and right side air bag continues air-breathing expansion, right side reed 5 continues to send high frequency sound wave, and now whole sound-producing device only sends high-frequency signal.When right hand piston no longer contacts right side air bag or piston stop motion, whole device stops sounding.
Whole sound-producing device can horizontal positioned, also can vertically place.In the process of a compressing or release, in two springs, longer spring length at least needs to guarantee the gas in its corresponding air bag to be discharged substantially in compression process; In two springs, shorter spring length will guarantee can make its corresponding air bag air-breathing to uncompressed state in the air-breathing expansion process of air bag at the most.
As shown in Figure 2, be one-way switch amount wireless and passive transmission structure figure.
One-way switch amount state is only " 0 ", and " 1 " two states, without to its channel number information.Therefore, signal sound-producing device is according to on-off state, the different sending orders of setting height frequency represent state " 0 " and state " 1 ", send the compound acoustic signals of different sequencings, compound sound wave is propagated in air, by sound sensing device, receive acoustic signals group, and this signal group is conveyed in decoding signals, according to the difference of one group of height frequency sending order, it is carried out to decipher, and send decipher result to microprocessor, analyze and extract the state information of current switching value, finally send to communicator by this way switch amount state transfer to host computer.
Host computer receiving key amount state, passage and the state information of switch amount are stored, and adopt the mode display switch amount information of figure or text, can adopt 3D Display Technique, on host computer, simulate the true geographical position relationship of each switching value, switching value information can show on this 3D rendering, people can be seen intuitively in host computer and be similar to the effect of monitoring camera by the state of each switching value under simulated scenario; Meanwhile, host computer can transmit switching value information by the network communications technology, makes monitoring behavior not be subject to the constraint of time, position.
The configurable alarm device of microprocessor and host computer, for extremely crucial on-off state or want the on-off state of special concern, arranges alert consitions, and when the state of these switching values meets alert consitions, alarm device sends predefined signal; These signals can be for alert song, the tinkle of bells, the voice of prerecording or by the long-range note of sending of gsm module.Alert consitions comprises channel information and the switching information of switching value, can also comprise temporal information, as regular time section is set, if on-off state changes, repeatedly changes or become a certain particular state in this time period, can alarm illustrate; Even can also comprise the combined state condition of a plurality of switching values, as stipulated, the state of certain A switch is 0, and the state of certain B switch is 1, and the state of certain C is 1 o'clock, sends a warning just now.
As shown in Figure 3, be multi-way switching values wireless and passive transmission structure figure.
Multi-way switching values information not only comprises its state information, also has switching value channel number information, so first will choose according to the channel number of switching value the combination of one group of height frequency, form one group of height frequency composite signal, the height combination of frequency that different switching value channel number is corresponding different, " 0 " or the one state information of the order representation switch amount of height frequency signal in composite signal.Air bag sends compound acoustic signals, compound sound wave is propagated in air, by sound sensing device, receive acoustic signals group, and this signal group is conveyed in decoding signals, according to the difference of one group of height frequency sending order, it is carried out to decipher, and send decipher result to microprocessor, analyze and extract the state information of current switching value, finally send to communicator by this way switch amount state transfer to host computer.As shown in Figure 4, for on-off state is " 1 " coding schematic diagram; As shown in Figure 5, for on-off state is " 0 " coding schematic diagram.
Setting an acoustic signals cycle is T, and its transmission cycle is divided into 3 parts, is respectively the part 1, part 2 and the part 3 that in figure, mark.Each acoustic signals must comprise this 3 parts in the cycle, but the time span of these 3 parts can be identical, also can be not identical.
Low frequency signal in compound acoustic signals and high-frequency signal respectively in a signal transmission cycle continuously but not identical two sections (they being respectively 1-2 section and 2-3 section).Order after the first high frequency of regulation low frequency represents state " 0 ", and after low frequency, the order of high frequency elder generation represents state " 1 "; Vice versa.For better explanation the present invention, in execution mode, select the order after the first high frequency of low frequency to represent state " 1 ", after low frequency, the order of high frequency elder generation represents the mode of state " 0 ".
When on-off state is " 1 ", as shown in Figure 4, in part 1, by high frequency composite air bag, first send high frequency sound wave, low frequency composite air bag does not send sound wave; In part 2, high frequency composite air bag continues to send high frequency sound wave, and low frequency composite air bag also sends low-frequency sound wave simultaneously; In part 3, high frequency composite air bag does not send sound wave, and low frequency composite air bag continues to send low-frequency sound wave.
When on-off state is " 0 ", as shown in Figure 5, in part 1, by low frequency composite air bag, first send low-frequency sound wave, high frequency composite air bag does not send sound wave; In part 2, low frequency composite air bag continues to send low-frequency sound wave, and compound sound wave air bag also sends high frequency sound wave simultaneously; In part 3, low frequency composite air bag does not send sound wave, and high frequency composite air bag continues to send high frequency sound wave.
Shown in accompanying drawing 6, be sound wave receipt decoding flow chart, the 16 way switch amount state sound wave receipt decodings of take are example.
First the frequency information of being chosen by sound-producing device in high frequency group and low frequency group is set in sound wave receiving system.In circuit, configuration can leach the filter of selected frequencies signal, and filter quantity is identical with the frequency signal quantity of choosing.Compound acoustic signals is converted into electric signal transmission to filter by acoustic sensor, filter filters out the acoustic signals of the characteristic frequency in acoustic signals group, avoid hum to disturb, filtering gained signal is converted to digital signal by AD converter and sends DSP to and process, be translated into the binary code of 10, because acoustic signals component is three parts, accordingly, processor is also translated into this signal group the binary code of three groups 10, according to the sequencing of three groups of binary codes, the current state of judgement switching value.
The process that DSP carries out decoding to signal is: stipulate that in 10 binary codes of each group, high 5 represent high-frequency signal group, low 5 represent low frequency signal group; Wherein in high 5, each in first 4 represents a high-frequency signal, when receiving, represents that this is frequently during the high-frequency signal of value, in DSP by this position 1, all the other positions 0; The 5th is high-frequency signal flag bit, represent whether to have received high-frequency signal, if received frequency signal corresponding to arbitrary frequency value in first four, in DSP by this position 1, otherwise set to 0.Low 5 with high 5 similar.According to the channel informations of front 4 judgement switching values of front four and low 5 of high 5, by the flag bit of high 5 and the flag bit of low 5 in three groups of decoded informations, the transmission sequence of judgement acoustic signals group, can judge the state information of switching value thus.If the 1st group code medium-high frequency flag bit is 1, the 1st is 1 in first four, low frequency flag bit 0; The 2nd group code medium-high frequency flag bit and low frequency are masked as and are 1, and in front 4 and 6-9 position, the 1st and the 7th is 1; The 3rd group code medium-high frequency flag bit is 0, and it is 1 that low frequency flag bit is 1, the 7; Can judge clearly, high-frequency signal first transmits, and the switching value of sending this sound wave is the 1st and the 7th the corresponding switching value that value characterizes frequently.According in specification, describe circuit unit form, signal flows to and DSP decode procedure, can implement this decoding circuit.
Acoustic sensor can change audio signal into device or the device of the signal of telecommunication, including but not limited to resistance conversion type sound sensing device, piezoelectric acoustic device, condenser type sound sensing device or moving-coil microphone.
The present invention can be applied in well, Ta Nei and the similar industry spot of complex environment, in well or in tower, need the position of pilot switch amount signal and alarm signal to lay sound wave dispensing device, and at well head or tower bottom, sound wave receiving system is installed, sound wave dispensing device constantly transmits sound wave or the alarm signal with switching value information, by the sound wave receiving system at the bottom of well head or tower, receive acoustic signals, it is decoded and sends on-off state information to host computer, thus realize in well or tower in the transmission of switching value signal and alarm signal.
The present invention also can be applicable to calculate seat in classroom and uses number, to judge messenger's quantity.At present, the seat using in classroom, for the formula seat that can automatically rebound, therefore, can be placed on the present invention under the seat of seat in classroom, and when using seat, it is 1 that on-off state is set, and is 0 while not using.Can solve the problem of statistical number of person inconvenience in classroom, help teacher to determine class student's quantity.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a wireless passive switch amount state transfer device, comprises switching value sound wave dispensing device, switching value sound wave receiving system, it is characterized in that,
Described switching value sound wave dispensing device comprises connecting rod, two flexible members, two pistons, two air bags, two blow guns and two groups of reeds; Different two flexible members of length are the parallel two ends that are installed on connecting rod respectively; Two pistons are connected with two flexible member other ends respectively; Within two air bags lay respectively at the scope that the piston under flexible member effect can arrive; Two blow guns are positioned at two air bag gas outlets accordingly, and two groups of reeds are positioned at blow gun place accordingly; Piston the drive of connecting rod and flexible member next first after one towards or deviate from composite air bag motion, make air bag compression or expansion, the air-flow in air bag is blown out or is sucked by suction nozzle, air-flow drives reed vibrates to send one group of acoustic signals;
Described switching value sound wave receiving system comprises connected successively acoustic sensor, filter, AD converter, DSP and microprocessor.
2. wireless passive switch amount state transfer device according to claim 1, is characterized in that, one group of reed comprises an air-breathing sounding reed and an air blowing sounding reed, and air-breathing sounding reed is identical with air blowing sounding reed frequency; Specifications parameter difference between two groups of reeds causes frequency values not identical.
3. wireless passive switch amount state transfer device according to claim 2, is characterized in that, the specifications parameter of described reed comprises reed material, reed shape, reed thickness, length of spring leaf, the distance between reed stiff end and inflection point.
4. according to the arbitrary described wireless passive switch amount state transfer device of claim 1-3, it is characterized in that, near reed, place the acoustic resonator that natural frequency is identical with reed frequency, by resonance, make sound strengthen amplifying.
5. according to the arbitrary described wireless passive switch amount state transfer device of claim 1-3, it is characterized in that, DSP or microprocessor module or host computer connect alarm device, set in advance alert consitions, when on-off state meets alert consitions, alarm device sends alarm signal; Described alert consitions is the particular state of single switch amount, the variable condition of single switch amount, the combined state of a plurality of switching values, or the single or multiple variable condition of the interior switching value of set time section.
6. according to the arbitrary described wireless passive switch amount state transfer device of claim 1-3, it is characterized in that, be applied to the industry spot of complex environment, in the position that needs pilot switch amount signal and alarm signal, lay sound wave dispensing device, and at well head or tower bottom, sound wave receiving system is installed, sound wave dispensing device constantly transmits sound wave or the alarm signal with switching value information, by the sound wave receiving system at the bottom of well head or tower, receive acoustic signals, it is decoded and sends on-off state information to host computer, thereby realize in well or tower in the transmission of switching value signal and alarm signal.
7. according to the arbitrary described wireless passive switch amount state transfer device of claim 1-3, it is characterized in that, be applied to calculate seat in classroom and use number, to judge messenger's quantity; Sound wave dispensing device is placed under the seat of seat in classroom, seat is used and does not use these two states corresponding to two states of switching value, by the processing of sound wave receiving system and host computer, realizes classroom demographics.
8. the switching value transmission method based on device described in claim 2, is characterized in that, comprises the code sending method of sound wave transmitting terminal, and the receive decoding method of sound wave receiving terminal;
The code sending method of described sound wave transmitting terminal, comprises the following steps:
Step 101, definite number of channels x that needs the switching value of sign, wherein, x is natural number and x >=1;
Step 102, according to the number of channels of switching value, sets up high-frequency signal group and low frequency signal group; High-frequency signal group is consistent with reed vibrates audible frequency with signal frequency value in low frequency signal group;
Step 103, determines high-frequency signal group medium-high frequency sine wave signal quantity m according to number of channels x, and low frequency signal group medium and low frequency sine wave signal quantity n; The value of m and n meets the < x of m * n > x and (m-1) * n < x and m * (n-1); Wherein, m, n are natural number and m >=1, n >=1;
Step 104, for the switching value of different passages is distributed a class frequency, a described class frequency comprises two frequency signals, is selected from high-frequency signal group and/or low frequency signal group; The described class frequency that the switching value of different passages is distributed is different;
Step 105, because flexible member length is different, causes it to drive piston action different in the sequencing of air bag, makes first compression or the expansion after of air bag one, and the piston that first acts on air bag first fails, after fail after acting on the piston of air bag; Air-flow in air bag is blown out or is sucked by suction nozzle, and air-flow drives the acoustic signals that sends described two frequencies after reed vibrates one first;
Step 106, the transmission of two frequency acoustic signals starts when different and stops when different, must cause a transmission cycle to be divided into three phases, and two frequency acoustic signals occupy respectively in a signal transmission cycle continuously but not identical two sections;
Step 107, in use signal transmission cycle, the different transmission sequences of two frequency signals characterize " 0 " and " 1 " of on-off state information; With the frequency values of two frequency signals, characterize switching value channel information;
The receive decoding method of described sound wave receiving terminal, comprises the following steps:
Step 201, matching and decoding frequency used is identical with the frequency in low frequency signal group with the high-frequency signal group who selects in coding;
Step 202, the encoded acoustic signals transmitting in described acoustic sensor admission of air, is translated into the signal of telecommunication, and filter filters out the acoustic signals of the characteristic frequency in acoustic signals, by sending DSP after AD converter to, processes,
Step 203, with respect to the three phases of signal transmission cycle, DSP module is translated into input signal the binary code of three groups, every group m+n+2 position form; M position continuous in every group of binary code is corresponding one by one with m high_frequency sine wave signal, and continuous n position is corresponding one by one with n low-frequency sine signal, and all the other two are respectively high frequency flag position and low frequency flag bit, and wherein, m, n are natural number and m >=1, n >=1;
Step 204, while not receiving signal, by whole figure place resets or the set of the binary code of every group of m+n+2 position;
Step 205, in step 204 during by whole figure place reset of binary code: the signal of resolving each stage, the frequency information comprising in analytic signal, when described frequency information being detected and only comprise a high fdrequency component, by the correspondence position " 1 " in the m position of this high fdrequency component, and by high frequency flag place value " 1 "; When described frequency information being detected and only comprise a low frequency component, by the correspondence position " 1 " in the n position of this low frequency component, and by low frequency sign place value " 1 "; When described frequency information being detected and comprise a high fdrequency component and a low frequency component, by the correspondence position " 1 " in the n position of the corresponding position in the m position of this high fdrequency component and this low frequency component, and by high frequency flag position and the set of low frequency flag bit;
In step 204 during by whole figure place set of binary code, its resolving with by whole figure place resets of binary code, just by position reset corresponding to frequency component;
Step 206, comprehensive relatively three groups of binary codes, according to the information of the high frequency flag position in three groups of binary codes and low frequency flag bit, the transmission sequence of judgement high_frequency sine wave signal and low-frequency sine signal, and then obtain " 0 " and " 1 " that its different transmission sequence characterizes on-off state information;
Step 207, judges high fdrequency component in three groups of binary codes and the frequency values of low frequency component, judges the switching value channel information that this class frequency value characterizes.
9. wireless passive switch amount state transfer method according to claim 8, is characterized in that, the signal frequency value in described high-frequency signal group and low frequency signal group is determined according to the actual audible frequency value of selected reed; Or according to preassigned signal frequency value in high-frequency signal group and low frequency signal group, adjust reed parameter, and then adjust its audible frequency.
10. wireless passive switch amount state transfer method according to claim 8, is characterized in that, switching value channel information and state information show by display module or send host computer to by the communication technology to be processed; Host computer to the binary code of described particular form store, demonstration or reminder alarm.
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