Summary of the invention
For above-mentioned technical matters, the object of the present invention is to provide check system and the method for sensor in a kind of lung ventilator, it does not need the support of third party's flow detection device, and the gas exporting firm discharge by controlling lung ventilator just can complete the periodic check of sensor in lung ventilator.
For achieving the above object, the present invention is achieved through the following technical solutions:
A check system for sensor in lung ventilator, it comprises: flow controlling unit, modulus value reading unit and verification unit, and described flow controlling unit exports the gas of firm discharge for controlling lung ventilator, and imports the value of described firm discharge into verification unit; Described modulus value reading unit is converted to the data after digital signal for the simulating signal of read sensor collection, and imports described data into verification unit; Described verification unit is connected with modulus value reading unit, and the simulating signal for the value and sensor collection that receive and store firm discharge is converted to the data after digital signal, and the graph of a relation both generating, complete the verification of sensor.
Especially, described flow controlling unit comprises: reduced pressure control unit and output control unit, and described reduced pressure control unit is used for carrying out Decompression Controlling to the gas of input lung ventilator, controls the stable of gaseous tension; Described output control unit is connected with reduced pressure control unit, exports the gas of firm discharge for controlling lung ventilator.
Especially, described reduced pressure control unit is reduction valve; Described output control unit is throttling valve.
Especially, described throttling valve is driven by stepper motor.
Especially, described system also comprises: checkpoint control module, and described checkpoint control module is connected with flow controlling unit, needs the point of verification for controlling output transducer, i.e. checkpoint, and order flow controlling unit exports the gas of the firm discharge corresponding with checkpoint.
The invention also discloses the method for calibration of sensor in a kind of lung ventilator, described method comprises the steps:
A, flow controlling unit control the gas that lung ventilator exports firm discharge, and import the value of described firm discharge into verification unit;
The simulating signal of collection is converted to the data after digital signal, and imports described data into verification unit by B, modulus value reading unit read sensor;
C, verification unit receive and the simulating signal of the value and sensor collection that store firm discharge is converted to the data after digital signal, and the graph of a relation of both generations, completes the verification of sensor.
Especially, also comprise before described steps A: checkpoint control module controls the point of output transducer needs verification, i.e. checkpoint, and order flow controlling unit exports the gas of the firm discharge corresponding with checkpoint.
Especially, described steps A specifically comprises: the gas of reduced pressure control unit to input lung ventilator carries out Decompression Controlling, controls the stable of gaseous tension; Then, output control unit controls the gas that lung ventilator exports firm discharge.
Especially, the reduced pressure control unit in described steps A is reduction valve, and output control unit is the throttling valve that stepper motor drives.
Beneficial effect of the present invention is, the check system of sensor and method in described a kind of lung ventilator, and it is according to the checkpoint arranged, and carries out Decompression Controlling, control the stable of gaseous tension by the gas of reduction valve to input lung ventilator; The gas of the firm discharge corresponding with checkpoint is exported by the throttle valve control lung ventilator driven by stepper motor; The data after digital signal are converted to by the simulating signal of modulus value reading unit read sensor collection; Verification unit is converted to the data after digital signal, the graph of a relation of both generations according to the value of firm discharge received and the simulating signal of sensor collection, completes the verification of sensor; Compared with the method for calibration of sensor in traditional lung ventilator, the present invention does not need dependence the 3rd flow detection device, by the different checkpoint arranged, just regularly automatically can complete verification to all points of verification that needs of sensor in lung ventilator, improve checking precision and verification efficiency, save verification cost.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.Please refer to shown in Fig. 1, Fig. 1 is the block diagram of the check system of sensor in lung ventilator of the present invention.
In the present embodiment, the check system of sensor in a kind of lung ventilator, comprising: checkpoint control module, flow controlling unit, modulus value reading unit and verification unit, and described flow controlling unit comprises: reduced pressure control unit and output control unit; Described reduced pressure control unit is precise pressure-reducing valve, and described output control unit is the throttling valve driven by stepper motor.
Described checkpoint control module needs the point of verification for controlling delivery rate sensor, also be the checkpoint of flow sensor, after checkpoint exports, checkpoint control module sends instruction to flow controlling unit, orders it to export the gas of the firm discharge corresponding with checkpoint.According to actual conditions, first checkpoint control module controls output checkpoint, and after a checkpoint verification terminates, checkpoint control module will export another checkpoint automatically, proceed verification, complete all verifications needing the point of verification in flow sensor successively.
Described precise pressure-reducing valve is connected with checkpoint control module, according to the checkpoint that checkpoint control module is arranged, precise pressure-reducing valve is used for carrying out Decompression Controlling to the gas of input lung ventilator, control the stable of gaseous tension, output error when lung ventilator exports the gas of the gas of firm discharge and standard flow rate can be reduced like this.
The described throttling valve driven by stepper motor is connected with precise pressure-reducing valve, the gas of the firm discharge corresponding with checkpoint is exported for controlling lung ventilator, also be the gas of standard flow rate, and ensure under same parity point, the consistance of each output gas, and import the value of described firm discharge into verification unit.Described throttling valve, according to the difference of checkpoint, controls the gas that lung ventilator exports the firm discharge of various flows value, but can not exceed the maximum flow of lung ventilator.
Described modulus value reading unit is connected with verification unit, for real-time reading flow quantity sensor, the simulating signal of collection is converted to the data after digital signal, and imports described data into verification unit.The simulating signal of described flow sensor collection is the relevant information of gas flow, then through analog to digital conversion, simulating signal is converted to digital signal, and described digital signal is the flow value of the gas that bit traffic sensor records.
The data that described verification unit is imported into for the value of firm discharge that receives and store throttling valve and import into and modulus value reading unit, and generate the graph of a relation of the flow value of the gas that the value of firm discharge and sensor record, the flow speed characteristic curve of this graph of a relation i.e. flow sensor, completes the automatic Verification of flow sensor.
Please refer to shown in Fig. 2, Fig. 2 is the process flow diagram of the method for calibration of flow sensor in lung ventilator of the present invention.
In the present embodiment, in a kind of lung ventilator, the method for calibration of flow sensor, comprises the steps:
Step 101, checkpoint control module control the point that output transducer needs verification, i.e. checkpoint, and order flow controlling unit exports the gas of the firm discharge corresponding with checkpoint.According to actual conditions, first checkpoint control module controls output checkpoint, and after a checkpoint verification terminates, checkpoint control module will export another checkpoint automatically, proceed verification, complete all verifications needing the point of verification in flow sensor successively.
The checkpoint that step 102, precise pressure-reducing valve are arranged according to checkpoint control module, carries out Decompression Controlling to the gas of input lung ventilator, controls the stable of gaseous tension; Output error when lung ventilator exports the gas of the gas of firm discharge and standard flow rate can be reduced like this.
Step 103, the throttle valve control lung ventilator driven by stepper motor export the gas of the firm discharge corresponding with checkpoint, also be the gas of standard flow rate, and ensure under same parity point, each consistance exporting gas, and import the value of described firm discharge into verification unit.Described throttling valve, according to the difference of checkpoint, controls the gas that lung ventilator exports the firm discharge of various flows value, but can not exceed the maximum flow of lung ventilator.
The simulating signal of collection is converted to the data after digital signal by the real-time reading flow quantity sensor of step 104, modulus value reading unit, and imports described data into verification unit.The simulating signal of described flow sensor collection is the relevant information of gas flow, and after analog to digital conversion, simulating signal is converted to digital signal, and described digital signal is the flow value of the gas that bit traffic sensor records.
Step 105, verification unit receive and store the data that the value of the firm discharge that throttling valve imports into and modulus value reading unit import into, then, the graph of a relation of the flow value of the gas that the value of generation firm discharge and sensor record, the i.e. flow speed characteristic curve of flow sensor, be easy to the result finding out that each checkpoint verifies according to flow speed characteristic curve, complete the automatic Verification of flow sensor in lung ventilator.
The check system of sensor and method in described a kind of lung ventilator, it comprises: checkpoint control module, precise pressure-reducing valve, the throttling valve driven by stepper motor, modulus value reading unit and verification unit; Described throttling valve, under the cooperation of precise pressure-reducing valve, controls the different check point exported according to checkpoint control module, control the gas that motor exports firm discharge; Described modulus value reading unit is used for real-time read sensor and the simulating signal of collection is converted to the numerical value after digital signal, is also the flow value of the gas that sensor detects; The flow value of the gas of the sensor detection that described verification unit is imported into for the value of firm discharge that receives and store throttling valve and import into and modulus value reading unit, and the graph of a relation both generating, the i.e. rating curve of sensor, completes the automatic Verification of flow sensor in lung ventilator; Technical scheme of the present invention, compared with the method for calibration of sensor in traditional lung ventilator, it does not need dependence the 3rd flow detection device, by the different checkpoint arranged, just regularly automatically can complete verification to all points of verification that needs of sensor in lung ventilator, improve checking precision and verification efficiency, save verification cost.
Above are only preferred embodiment of the present invention and institute's application technology principle, be anyly familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed in protection scope of the present invention.