CN107569753A - Breathing pipeline, lung ventilator and sensor data transmission method - Google Patents
Breathing pipeline, lung ventilator and sensor data transmission method Download PDFInfo
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- CN107569753A CN107569753A CN201710724490.3A CN201710724490A CN107569753A CN 107569753 A CN107569753 A CN 107569753A CN 201710724490 A CN201710724490 A CN 201710724490A CN 107569753 A CN107569753 A CN 107569753A
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Abstract
The invention discloses a kind of breathing pipeline, lung ventilator and sensor data transmission method, the breathing pipeline includes two binding posts, heating unit, controller and at least one sensor；Heating unit is connected between described two binding posts, and heating unit includes heating coil and the signal modulator being connected with heating coil；Each sensor exports the sensing data collected to controller；Controller encodes to the sensing data, and by signal modulator by the sensing data after coding in the form of AC signal through described two binding posts export.
Description
Technical field
The present invention relates to lung ventilator technical field, more particularly it relates to a kind of breathing pipeline used for respirators, one
Lung ventilator and a kind of sensor data transmission method for being used for this kind of breathing pipeline kind with this kind of breathing pipeline.
Background technology
The equipment that lung ventilator refers to treat the apnea and other disordered breathing phenomenons in sleep procedure, it passes through
The patient contacting portions such as mask provide barotropic gas to patient, to aid in patient respiratory, mitigate work of breathing ozone.
For lung ventilator when carrying out mechanical ventilation, gas must first pass through humidifying processing, could be entered by breathing pipeline and suffered from
Person's respiratory tract, if the gas without humidifying is directly entered respiratory tract, ventilation for a long time necessarily causes respiratory tract dehydration, mucous membrane to do
It is dry, secretion is dry and hard, ciliary movement decrease, expectoration be not smooth, it is concurrent that airway obstruction, atelectasis and scabies secondary infection etc. easily occurs
Disease.
Therefore, as shown in figure 1, the lung ventilator clinically used at present is equipped with humidification machine 2 ' substantially, to be carried out to gas
Humidifying processing, moistens the gas of suction patient's body, reduces stimulation of the dry gas to respiratory mucosa, is brought more for patient
Add comfortable usage experience.Specifically, lung ventilator mainly includes breathing machine host 1 ', humidification machine 2 ', breathing pipeline 3 ' and mask
4 ', breathing machine host 1 ' supplies gas into humidification machine 2 ', to carry out humidifying processing to gas by humidification machine 2 ', by humidifying
The gas of processing is carried to patient by breathing pipeline 3 ' and mask 4 '.
Here, because the gas by humidifying processing reaches breathing pipeline 3 ' afterwards it is possible that condensing phenomenon and exhaling
The middle formation ponding in suction pipe road 3 ', and then potential danger is caused to patient.In order to eliminate in breathing pipeline 3 ' because condense phenomenon and
Caused water, occur a kind of breathing pipeline with heating function at present, it is solidifying to be unlikely to produce while humidity is ensured
Tie phenomenon.
Fig. 2 shows a kind of equivalent structure schematic diagram of this kind of breathing pipeline.According to Fig. 2, this kind of breathing pipeline tool
There are heating coil and temperature sensor, wherein, heating coil is equivalent to resistance R1 ' and resistance R2 ' in fig. 2.This kind breathes
The action principle of pipeline is：Breathing machine host is by controlling supply unit to produce heat energy for heating coil power supply to eliminate respiratory siphon
The water condensed in road, and the temperature information gathered by temperature sensor in breathing pipeline is supplied to the master control list of breathing machine host
First U1, so that main control unit U1 carries out computer heating control.
The temperature for needing to collect by extra wire for sensors such as existing breathing pipeline, temperature sensors
Information transmission gives main control unit U1, and so, main control unit U1 just needs to increase a connector to connect temperature sensor, reduction
The stability of system.
The content of the invention
The embodiment of the present invention solve existing breathing pipeline existing for sensor need by extra wire to lung ventilator
The technical problem of the master unit transmissions sensing data of main frame.
According to the first aspect of the invention, there is provided a kind of breathing pipeline, it include two binding posts, heating unit,
Controller and at least one sensor；The heating unit is connected between described two binding posts, the heating unit bag
Include heating coil and the signal modulator being connected with the heating coil；The sensing data that each sensor will collect
Export to the controller；The controller encodes to the sensing data, and will be compiled by the signal modulator
Sensing data after code is exported in the form of AC signal through described two binding posts.
Optionally, the signal modulator has the switching device for being controlled by the controller, so that the heating is single
It is the second of cut-off state that member, which has the first resistance that the corresponding switching device is conducting state and the corresponding switching device,
Resistance；The controller is by controlling the on off state of the switching device, by the sensing data after coding with AC signal
Form exported through described two binding posts.
Optionally, the relative change between first resistance and second resistance is less than or equal to 5 percent.
Optionally, the signal modulator also includes basic resistance, and the basic resistance and the switching device are simultaneously
Connection connection, the signal modulator are connected in series with the heating coil.
Optionally, the signal modulator also includes basic resistance, and the basic resistance and the switching device string
Connection connection, a part for the signal modulator and the heating coil are connected in parallel.
Optionally, the switching device is metal-oxide-semiconductor, and the grid of the metal-oxide-semiconductor is connected with the controller.
Optionally, the signal modulator includes coupling transformer, the secondary coil of the coupling transformer with it is described
Heating coil is connected in series, and the sensor output after coding is applied to the coupling by the controller in the form of AC signal
On the primary coil of transformer.
Optionally, the breathing pipeline is also included for the power supply of all the sensors of the controller and the breathing pipeline
Voltage conversion unit, the voltage input end of the voltage conversion unit is connected with a potential point of the heating unit.
Optionally, at least one sensor is included in temperature sensor, humidity sensor and pressure sensor
At least one sensor.
Optionally, the controller is encoded using Manchester code to the sensing data.
According to the second aspect of the invention, there is provided a kind of lung ventilator, the lung ventilator include breathing machine host and according to
Breathing pipeline described in the first aspect of the present invention, the breathing machine host include：
Supply unit, apply constant current to the heating unit for two binding posts via the breathing pipeline and drive
It is dynamic；
Signal processing unit, for filtering out AC signal from the voltage signal exported through described two binding posts, obtain
The data flow of sensing data after to presentation code, and the stream compression is changed to digital coding；And
Main control unit, for being decoded to the digital coding, obtain corresponding sensing data.
According to the third aspect of the invention we, there is provided a kind of sensor data transmission method for breathing pipeline, it is described
Breathing pipeline includes two binding posts, the heating coil being connected between described two connection terminals and at least one sensing
Device；The sensor data transmission method includes：
Receive the sensing data of each sensor output；
The sensing data is encoded；
Sensing data after coding is exported in the form of AC signal through described two binding posts.
The beneficial effect of the present invention is that the breathing pipeline with heating function of the invention is except with heater wire
Outside circle, also it is connected to form heating unit with heating coil with signal modulator, controller will be right by the signal modulator
The coding of inductive sensing device data is modulated in the form of AC signal on the voltage signal between described two binding posts.It is based on
This kind of structure, when heating unit is applied in constant current driving by two binding posts and heated, controller can pass through letter
Number modulator causes the voltage between two binding posts to change, and so, controller can be by this kind of mode via two
Output is corresponding with sensing data encodes to the main control unit for breathing machine host for individual binding post (i.e. heating unit in itself), with
The transmission for arranging that extra wire carries out sensing data is saved, decreases the number for the connector that main control unit needs are arranged
Amount, there is provided the stability of a system.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
It is combined in the description and the accompanying drawing of a part for constitution instruction shows embodiments of the invention, and even
It is used for the principle for explaining the present invention together with its explanation.
Fig. 1 is the basic composition structural representation according to lung ventilator；
Fig. 2 is a kind of existing equivalent structure schematic diagram of the breathing pipeline with heating function；
Fig. 3 is the equivalent structure schematic diagram according to a kind of embodiment of breathing pipeline of the present invention；
Fig. 4 is a kind of equivalent circuit structure schematic diagram of embodiment of breathing pipeline in Fig. 3；
Fig. 5 is based on a kind of data flow caused by circuit structure shown in Fig. 4；
Fig. 6 is the equivalent circuit structure schematic diagram of another embodiment of breathing pipeline in Fig. 3；
Fig. 7 is the equivalent circuit structure schematic diagram of the third embodiment of breathing pipeline in Fig. 3；
Fig. 8 is the frame principle figure according to a kind of embodiment of lung ventilator of the present invention.
Description of reference numerals：
U1- main control units；S1- temperature sensors；
H1- humidity sensors；P1- pressure sensors；
U2- controllers；The equivalent resistance of R1- first paragraph coils；
The equivalent resistance of R2- second segment coils；RT- signal modulators；
The basic resistance of R3-；Q1- switching devices；
D1- voltage conversion units；V1- potential points；
Mono- binding post of J1-；Another binding post of J2-；
710th, 1 '-breathing machine host；2 '-humidification machine；
3 '-breathing pipeline；4 '-mask；
The equivalent resistance of R1 ', R2 '-heating coil.
Embodiment
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless have in addition
Body illustrates that the unlimited system of part and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The scope of invention.
The description only actually at least one exemplary embodiment is illustrative to be never used as to the present invention below
And its application or any restrictions that use.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
The present invention in order to solve existing for existing breathing pipeline, sensor need by extra wire to breathing machine host
Master unit transmissions sensing data the problem of, there is provided a kind of sensor data transmission method for breathing pipeline, its
In, the breathing pipeline includes two binding posts, the heating coil being connected between two connection terminals and at least one sensing
Device.This method includes：Receive the sensing data of each sensor output；Sensing data is encoded；By the coding with
The form of AC signal is modulated on the voltage signal between two binding posts, and specifically, the AC signal is superimposed upon constant current
It is driven through two binding posts to act on heating coil on caused direct current signal, forms the voltage signal.
Fig. 3 is the structural representation according to a kind of embodiment of breathing pipeline of the present invention.
According to Fig. 3 and Fig. 4, the breathing pipeline includes two binding posts J1, J2, heating unit, controller U2, and
At least one sensor.
Two binding posts J1, J2 are used to carry out breathing pipeline and breathe the connection between machine host.
The heating unit is connected between two binding posts J1, J2, so that breathing machine host can pass through two wiring
Terminal J1, J2 apply constant current driving to heating unit.
The heating unit includes heating coil and the signal modulator RT being connected with heating coil.
In one embodiment of the invention, the heating unit, controller U2 and at least one sensor can be built-in
In the body of breathing pipeline.
In the further embodiment of the present invention, at least heating coil part of the heating unit can be arranged on body
Outside, such as be attached on the outer wall of body, and at least one sensor is built in the body of breathing pipeline, to detect body
Interior ambient condition.
Above-mentioned at least one sensor can include in temperature sensor S1, humidity sensor H1, pressure sensor P1
It is at least one.
In the embodiment that breathing pipeline sets at least two sensors, at least two sensor can be a variety of differences
The sensor of type and/or the sensor that multiple same types are set.
Sensor for setting multiple same types, by taking temperature sensor S1 as an example, breathing pipeline of the present invention can be set
Two or more (including two) temperature sensor is put, to carry out the collection of the temperature information in body at diverse location, Jin Erti
The precision of high computer heating control.
Each sensor S1, H1, P1 and controller U2 connection, by the sensing of gas station in the reflection body collected
Device data transfer is to controller U2.The gas station is, for example, gas temperature, gas humidity, gas pressure etc..
In one particular embodiment of the present invention, the breathing pipeline is provided with temperature sensor S1, humidity sensor H1
With pressure sensor P1.
It is humidity and the coefficient knot of temperature because condensation occurs in breathing pipeline for the gas after humidifying is handled
Fruit, therefore, it is supplied to the main control unit of lung ventilator main body (attached by increasing the humidity information in humidity sensor H1 collection bodys
Not shown in figure), main control unit combination temperature information and humidity information can be enabled to carry out the control of acid extraction
System, more reliably to avoid producing condensate, and avoid the occurrence of reheating problem.
Pressure sensor P1 is the necessary device of lung ventilator, in the prior art, for the ease of carrying out pressure sensor
The transmission for the pressure information that P1 is collected, pressure sensor P1 are generally arranged at the air outlet of breathing machine host.And for
The breathing pipeline of the present invention, pressure sensor P1 can be arranged on completely from mask closer to breathing pipeline in, or even just set
Put in the end of the neighbouring mask of breathing pipeline, this can more precisely collect output to the gas pressure of human body.
Controller U2 is encoded to the sensing data received, and the sensing data after coding is sent to letter
Number modulator RT.Signal modulator RT by the sensing data after encoding in the form of AC signal it is defeated through two binding posts
Go out, i.e. sensing data after coding is superimposed to and exported through two binding posts by signal modulator RT in the form of AC signal
Reference voltage signal on export the sensing data, the reference voltage signal be signal modulator RT not by sensing data with
When AC signal is superimposed, the voltage signal through two binding post output.
In the embodiment that breathing pipeline sets two or more sensor, controller U2 can transmit week in each signal
In phase, according to the order of agreement, successively by the sensing data after the coding of corresponding each sensor in the form of AC signal
Exported through two binding posts.I.e. in each signal transmission cycle, the current sensor data of each sensor is completed
Transmission.Similarly, as being three sensors, then the output of sensing data can be sequentially completed according to default order.
Based on this kind of structure, apply constant current to heating unit by two binding posts J1, J2 in breathing machine host and drive,
And then open breathing pipeline heating function when, controller U2 can by signal modulator RT by the sensing data after coding with
The form of AC signal exports through two binding posts, and then realizes the main control unit output transducer data to breathing machine host
Purpose.This kind of structure to breathe machine host without by setting extra connector to connect sensor S1 with extra wire
Sensing data corresponding to acquisition, and then external connection structure is not only simplify, also improve the stability of a system.
Further, breathing pipeline of the invention increases in the case where setting two or more sensor also without extra
More wires and connector are added to carry out the transmission for the information that each sensor collects.And this is for existing breathing pipeline,
External circuit structure will be caused very numerous and diverse.
Fig. 4 is a kind of equivalent circuit structure schematic diagram of embodiment of breathing pipeline in Fig. 3.
According to Fig. 4, in this embodiment, signal modulator RT has the switching device Q1 for being controlled by controller U2,
I.e. switching device Q1 control terminal is connected with controller U2 control signal output.So, controller U2 can be controlled with passing through
The resistance of switching device Q1 processed on off state regulation heating unit so that heating unit has corresponding switching device Q1 for conducting
First resistance RT of state1With the second resistance RT that corresponding switching device Q1 is cut-off state2。
Further, above-mentioned first resistance RT1With the second resistance RT2Between relative change can be less than or equal to percentage
Five.Wherein, if the first resistance RT1More than the second resistance RT2, then the relative change is to be equal to (RT1-RT2)/RT2Percentage
Than；If the first resistance RT1Less than the second resistance RT2, then the relative change is to be equal to (RT2-RT1)/RT1Percentage.So,
It will be encoded in controller U2 controlling switch device Q1 on off state in a manner of AC signal, be modulated at two terminals
When on the voltage signal between sub- J1, J2, minor variations can only occur for the voltage signal, and this will ensure that heating function substantially will not
Influenceed by signal transmission, improve the stability of heating function, therefore, for this kind of embodiment, heating is transmitted with signal
In the case where not influenceing heating effect while it can carry out.
Above-mentioned first resistance RT1With the second resistance RT2Between relative change can also further be less than or equal to percent
Three.
In the embodiment shown in fig. 4, above-mentioned signal modulator RT also includes basic resistance R3, and the basic resistance R3 with
Switching device Q1 is connected in parallel, and signal modulator RT is connected in series with heating coil.
Because heating unit is connected between two binding posts J1, J2, therefore, heating unit is U-shaped on the whole, in order to
Improve the uniformity that the heating coil of heating unit is heated to tubular body, in the embodiment shown in fig. 4, the heater wire
Circle may further include separate first paragraph coil and second segment coil, wherein, the equivalent resistance of first paragraph coil is
Resistance R1, the equivalent resistance of second segment coil is resistance R2, and the first end of first paragraph coil is connected with a binding post J1, the
The first end of two sections of coils is connected with another binding post J2, and signal modulator RT is then connected in series in the of first paragraph coil
Between two ends and the second end of second segment coil.
Further, the first paragraph coil and second segment coil have essentially identical length, with respectively from body
One end extends to the other end of body, and signal modulator RT is then connected in the end of body between two sections of coils, to enter one
Step improves the uniformity heated to tubular body.
For this kind of embodiment, in order to meet the first resistance RT1With the second resistance RT2Between relative change be less than or wait
In 5 percent requirement, the conducting resistance of basic the resistance R3 and switching device should be significantly less than resistance R1, R2.
Certainly, the embodiment or signal modulator RT being connected in series for signal modulator RT and heating coil
It is connected between heating coil and any binding post J1, J2.
In the further embodiment of the present invention, the signal modulator can also use basic resistance R3 and switching device Q1
Signal modulator RT structure is connected in series to form, so, signal modulator RT should be a part of in parallel with heating coil
Connection.For this kind of embodiment, in order to meet the first resistance RT1With the second resistance RT2Between relative change be less than or equal to hundred
/ five requirement, the basic resistance R3 should be significantly greater than resistance R1, R2.
In a further embodiment, the signal modulator can also only include switching device Q1, and make signal modulator with
The very small part of heating coil is connected in parallel.
Because metal-oxide-semiconductor can have less conducting resistance, therefore, in the embodiment shown in fig. 4, the switching device is
Metal-oxide-semiconductor, and the grid of metal-oxide-semiconductor is connected with controller U2.
So that switching device is NMOS tube as an example, the direction that the collector and emitter of NMOS tube drive according to constant current it is corresponding and
High potential one end connects with low potential one end.
In the further embodiment of the present invention, the switching device can also be the components such as triode.
Signal modulator RT based on more than uses the structure of switching device, passes through two binding posts in breathing machine host
J1, J2 apply constant current driving to heating unit, and then during the heating function of unlatching breathing pipeline, controller U2 can be opened by control
The mode of the resistance of device Q1 on off state change heating unit is closed, by the sensing data after coding with the shape of AC signal
Formula exports through two binding posts J1, J2, and this explanation can be extracted from the voltage signal of two binding post J1, J2 output
Sensing data to after the coding.For this kind of signal transmission form, following steps can be performed in controller U2 one end：
Step S101, receive the sensing data that each sensor S1, H1, P1 are collected.
Step S102, in the way of arranging with main control unit, sensing data is encoded.
In this step, in order to improve the reliability of information transfer, can be encoded using Manchester code.With according to
With the agreement of main control unit, the binary codings of respective sensor data is exemplified by 10100111001, if making Manchester
Code is in the case of 1 corresponding 10 and 0 corresponding 01, then the binary coding switchs to Manchester code and is
1001100101101010010110；If in the case where making Manchester code as 1 corresponding 01 and 0 corresponding 10, this two enters
Coding processed switchs to Manchester code for 0110011010010101101001.
The advantages of using Manchester code be not in data encoding it is constant for 1 or it is constant be 0 situation, can
It is modulated exactly, it is possible to increase the reliability of data transfer.
In the further embodiment of the present invention, other coding structures can also be used.
Step S103, by controlling switch device Q1 on off state by the sensing data after encoding with AC signal
Mode exported through two binding posts J1, J2, that is, encode after sensing data be included in through two binding posts J1, J2 it is defeated
In the voltage signal gone out.
And following steps can be performed in breathing machine host one end：
Step S201, the voltage signal between collection two binding posts J1, J2.
Step S202, AC signal is filtered out from voltage signal, that is, filters out the flip-flop in voltage signal, is represented
The data flow of sensing data after coding.
For example, when carrying out constant current driving to heating unit, voltage signal is the first resistance RT in heating unit1When number
It is worth for 19.8V, and is the second resistance RT in heating unit2When numerical value be 20.2V, then filter out direct current in voltage signal into
Point, i.e. 20V flip-flop can obtain the data flow of the sensing data after presentation code, the data flow have -0.2V and
Two kinds of magnitudes of voltage of 0.2V, waveform configuration may refer to a kind of data flow of data encoding of correspondence shown in Fig. 5.
Step S203, it is the digital coding that main control unit can identify, i.e. binary coding by data stream.
Still by it is above-mentioned with the data flow of two kinds of magnitudes of voltage of -0.2V and 0.2V exemplified by, this can be according to agreement by -0.2V
Low level 0 is converted to, and 0.2V is converted into high level 1, -0.2V can also be converted to by high level 1 according to agreement, and will
0.2V is converted to low level 0.
The step of can also including carrying out enhanced processing to data stream among these, in order to change.
Step S204, main control unit receives the digital coding after conversion, and is decoded, and obtains corresponding sensor number
According to.
Fig. 6 is the equivalent circuit structure schematic diagram of another embodiment of breathing pipeline in Fig. 3.
According to Fig. 6, the main distinction between the embodiment and embodiment illustrated in fig. 4 is, above-mentioned signal modulator
RT includes coupling transformer T1, and coupling transformer T1 secondary coil SC connects with heating coil, coupling transformer T1's
Primary coil PC receives AC signals of the controller U2 according to the output of the sensing data after coding.
Potential isolation can be realized due to carrying out coupling by coupling transformer T1, therefore, the embodiment supports primary line
Enclose PC and the secondary coil SC not designs on ground altogether.
In this embodiment, controller U2 one end can perform following steps：
Step S301, receive the sensing data that each sensor S1, H1, P1 are collected.
Step S302, in the way of arranging with main control unit, sensing data is encoded.
Step S303, the sensing data after coding is applied to coupling transformer T1 primary in the form of AC signal
On coil PC, so that the AC signal is loaded onto between two binding posts J1, J2 by transformer T1 secondary coil SC
On voltage signal, and then exported through two binding posts J1, J2.
Secondary coil SC and primary coil PC turn ratio can be less than 1, equal to 1 or more than 1.
In embodiment of the secondary coil SC and primary coil PC turn ratio more than 1, this can be incited somebody to action in secondary coil SC
Voltage reduction, Current amplifier are obtained while the AC signal is loaded onto on the voltage signal between two binding posts J1, J2
Effect.So, the sensing data after coding is passed through in a manner of AC signal coupling transformer T1 in controller U2
During two binding post J1, J2 output, minor variations can only occur for the voltage signal, such as change is less than or equal to percent
Five, this, which will ensure that heating function will not be transmitted by signal substantially, is influenceed, and improves the stability of heating function.Fig. 7 is Fig. 3
The equivalent circuit structure schematic diagram of another embodiment of middle breathing pipeline.
According to Fig. 7, a kind of self-powered structure is provided in this embodiment, and in this embodiment, breathing pipeline is also
Include the voltage conversion unit D1 of the power supplies such as all the sensors S1, H1, P1 for controller U2 and breathing pipeline, the voltage conversion
One potential point V1 connections of the voltage input end and heating unit of cells D 1, i.e., in this embodiment, breathing pipeline are single from heating
Power taking uses for controller U2 and each sensor S1, H1, P1 in member, and this allows breathing pipeline only to have two binding posts
J1, J2 enormously simplify external connection structure as the interface between breathing machine host.
Potential point V1 position can combine operating voltage and the voltage that controller U2 and each sensor S1, H1, P1 need
The type selecting of switching device is selected.
In controller U2 and each sensor S1, H1, P1 need the embodiment of identical operating voltage, for example, 3.3V, the electricity
Pressure converting unit D1 can include one piece of voltage conversion chip.
In controller U2 and each sensor S1, H1, P1 need the embodiment of two or more (including two kinds) operating voltages,
Such as 3.3V, 5V, voltage conversion unit D1 can include each voltage conversion chip for carrying out corresponding voltage conversion.
In a further embodiment, breathing pipeline of the invention can also pass through breathing when being connected with breathing machine host
Machine host is that controller U2 and each sensor S1, H1, P1 power, and this is with by breathing machine host being in the prior art TEMP
The structure of device power supply is similar.
Fig. 8 shows a kind of frame principle figure of embodiment according to lung ventilator of the present invention.
According to Fig. 8, the lung ventilator includes breathing machine host 710 and the breathing pipeline 720 according to the present invention.
The breathing machine host 710 includes main control unit U1 and supply unit B1, and supply unit B1 is via breathing pipeline 720
Two binding posts J1, J2 apply constant current driving to heating unit.
Supply unit B1 can be controlled by main control unit U1.This allows the breathing pipeline 720 of the present invention to support to lead
The sensing data that control unit U1 collects according to each sensor, by controlling supply unit B1 break-makes, enters to breathing pipeline 720
The control program of the automatic computer heating control of row.
Further, because data flow is the small alternating component that is modulated on voltage signal, therefore, constant current driving is changed
Current value can't influence information transfer, so the present invention breathing pipeline 720 can also support main control unit U1 according to respectively
The sensing data that sensor collects, breathing pipeline is adjusted by the size of the constant current driving of regulation power supply device B1 outputs
Heating power automatic computer heating control control program.
Main control unit U1 is connected by signal processing circuit T1 with two binding posts J1, J2.
Signal processing circuit T1 according to above-mentioned steps S201 to step S203 can include filter circuit, amplifying circuit,
Digital signaling conversion circuit etc., to filter out exchange from the voltage signal between two binding posts J1, J2 by filter circuit
Signal, data flow is obtained, and enhanced processing is carried out to data stream by amplifying circuit, then will put by digital signaling conversion circuit
The high and low level digital coding that data stream after big can identify for main control unit.The digital signaling conversion circuit is for example
Voltage comparator etc. can be included but is not limited to.
Main control unit U1 is used to decode the digital coding received, obtains corresponding sensing data.
In order that breathing pipeline 720 can be plugged easily, the humidification machine of the lung ventilator can have and two
One-to-one two connection terminals of binding post J1, J2, the grafting that is used for that this two connection terminals are arranged on humidification machine breathe
At the interface of pipeline；Supply unit B1 two output ends for being used for output constant current driving are corresponding with two connection terminals to be connected
Connect, signal processing circuit T1 two inputs also connection corresponding with two connection terminals.
Further, can also be connected between supply unit B1 and signal processing circuit T1 for example including diode every
From circuit.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Point cross-reference, what each embodiment stressed is the difference with other embodiment, and each embodiment
It can be used alone or be combined with each other as needed.
Although some specific embodiments of the present invention are described in detail by example, the skill of this area
Art personnel it should be understood that example above merely to illustrating, the scope being not intended to be limiting of the invention.The skill of this area
Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This hair
Bright scope is defined by the following claims.
Claims (12)
1. a kind of breathing pipeline, it is characterised in that including two binding posts, heating unit, controller and at least one sensing
Device；The heating unit is connected between described two binding posts, and the heating unit includes heating coil and added with described
The signal modulator of heat coil connection；Each sensor exports the sensing data collected to the controller；Institute
Controller is stated to encode the sensing data, and by the signal modulator by the sensing data after coding to hand over
The form of stream signal exports through described two binding posts.
2. breathing pipeline according to claim 1, it is characterised in that the signal modulator, which has, is controlled by the control
The switching device of device, so that the heating unit is with the first resistance that the corresponding switching device is conducting state and correspondingly
The switching device is the second resistance of cut-off state；The controller, will by controlling the on off state of the switching device
Sensing data after coding is exported in the form of AC signal through described two binding posts.
3. breathing pipeline according to claim 2, it is characterised in that the phase between first resistance and second resistance
5 percent are less than or equal to change.
4. breathing pipeline according to claim 2, it is characterised in that the signal modulator also includes basic resistance, and
The basic resistance is connected in parallel with the switching device, and the signal modulator is connected in series with the heating coil.
5. breathing pipeline according to claim 2, it is characterised in that the signal modulator also includes basic resistance, and
The basic resistance is connected in series with the switching device, a part of company in parallel of the signal modulator and the heating coil
Connect.
6. breathing pipeline according to claim 2, it is characterised in that the switching device is metal-oxide-semiconductor, the metal-oxide-semiconductor
Grid is connected with the controller.
7. breathing pipeline according to claim 1, it is characterised in that the signal modulator includes coupling transformer, institute
The secondary coil and the heating coil for stating coupling transformer are connected in series, and the controller is by the sensor number after the coding
The form of AC signal is applied on the primary coil of the coupling transformer according to this.
8. breathing pipeline according to any one of claim 1 to 7, it is characterised in that the breathing pipeline is also including being
The voltage conversion unit of all the sensors of the controller and breathing pipeline power supply, the voltage of the voltage conversion unit
Input is connected with a potential point of the heating unit.
9. breathing pipeline according to any one of claim 1 to 7, it is characterised in that at least one sensor bag
Include at least one of temperature sensor, humidity sensor and pressure sensor sensor.
10. breathing pipeline according to any one of claim 1 to 7, it is characterised in that the controller uses Man Chesi
Special code encodes to the sensing data.
11. a kind of lung ventilator, including breathing machine host, it is characterised in that the lung ventilator also includes appointing in claim 1 to 10
Breathing pipeline described in one, the breathing machine host include：
Supply unit, apply constant current driving to the heating unit for two binding posts via the breathing pipeline；
Signal processing unit, for filtering out AC signal from the voltage signal exported through described two binding posts, obtain table
Show the data flow of the sensing data after coding, and the stream compression is changed to digital coding；And
Main control unit, for being decoded to the digital coding, obtain corresponding sensing data.
12. a kind of sensor data transmission method for breathing pipeline, the breathing pipeline includes two binding posts, connection
Heating coil and at least one sensor between described two connection terminals；Characterized in that, the sensing data passes
Transmission method includes：
Receive the sensing data of each sensor output；
The sensing data is encoded；
Sensing data after coding is exported in the form of AC signal through described two binding posts.
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