CN101614575B - Method for correcting relation of voltage and airflow speed of mass flow sensor - Google Patents

Method for correcting relation of voltage and airflow speed of mass flow sensor Download PDF

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CN101614575B
CN101614575B CN 200810115690 CN200810115690A CN101614575B CN 101614575 B CN101614575 B CN 101614575B CN 200810115690 CN200810115690 CN 200810115690 CN 200810115690 A CN200810115690 A CN 200810115690A CN 101614575 B CN101614575 B CN 101614575B
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mass flow
sensor
flow rate
voltage
flow sensor
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CN101614575A (en
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丛玉孟
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北京谊安医疗系统股份有限公司
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Abstract

The invention provides a method for correcting a relation of voltage and airflow speed of a mass flow sensor. The method comprises the following steps: step one, placing a first mass flow sensor and a second mass flow sensor at an air suction port and an exhalation port of an anesthesia machine respectively; step two, setting the anesthesia machine so that the air can enter only from the exhalation port and can be exhausted only from the air suction port; and step three, providing gas of different flow speeds to the exhalation port, and synchronously correcting respective relation of the voltage and the airflow speed of the first mass flow sensor and the second mass flow sensor according to the voltage value corresponding to the measured airflow flowing through the first mass flow sensor and the second mass flow sensor respectively. Therefore, compared with separate correction, by adopting the method of the invention, the correction can keep better consistency, and the correction precision can be improved; and simultaneously, the correction method is simplified, unnecessary workload is reduced, and the correction efficiency is improved.

Description

CN 101614575 B 说明书 1/4 页 CN 101614575 B specification 1/4

校正质量流量传感器的电压与气流速度关系的方法 The method of the relationship between voltage and gas flow rate corrected mass flow rate sensor

技术领域 FIELD

[0001] 本发明涉及麻醉机,更具体地,涉及一种校正质量流量传感器的电压与气流速度关系的方法。 [0001] The present invention relates to an anesthesia machine, and more particularly, relates to the relationship between the voltage and the flow velocity sensor correcting method for mass flow.

背景技术 Background technique

[0002] 在对麻醉机等的质量流量传感器进行气体流量监测时,首先需要对吸入和呼出质量流量传感器进行校正;目前麻醉机中的质量流量传感器的校正通常使用两种方法:一是认为一种质量流量传感器的特性曲线在所有的麻醉机中具有一致性,按照特性曲线的方法来校正,使用这种监测方法相对比较简单,但是精度难以保证;二是对传感器进行多点校正,这种方法能够保证精度,但是校正的工作量大。 [0002] In the anesthesia machine or the like when mass flow rate sensor monitors the gas flow rate, inhalation and exhalation first need to be corrected mass flow sensor; a correction current anesthesia machines mass flow sensors typically use two methods: one is that a species mass flow sensor has a characteristic consistency of all anesthesia machine, the method according to the characteristic curve is corrected using this monitoring method is relatively simple, but difficult to ensure accuracy; the second is multi-point calibration sensor, which a method to ensure accuracy, but the calibration workload.

发明内容 SUMMARY

[0003] 本发明所要解决的问题是,提供一种校正质量流量传感器的电压与气流速度关系的方法,其能够同时校正呼气流量传感器和吸气流量传感器的电压与气流速度关系,简化了校正方法并且提高了校正效率。 [0003] The present invention is to solve the problem is to provide a correction method for mass flow sensor voltage vs. speed air flow, which can be corrected and the expiratory flow sensor and a voltage sensor inspiratory flow relationship between the gas flow velocity while simplifying correction the method of correcting and improving the efficiency.

[0004] 为了解决上述技术问题,本发明提出了一种校正质量流量传感器的电压与气流速度关系的方法,该方法包括以下步骤:步骤一,将第一质量流量传感器与第二质量流量传感器分别置于麻醉机的吸气口和呼气口处;步骤二,设置麻醉机,使气体只能从呼气口进入并只能从吸气口排出;以及步骤三,向呼气口提供不同流速的气体,并根据所测量的分别流过第一质量流量传感器和第二质量流量传感器的气流所对应的电压值来同时校正第一质量流量传感器和第二质量流量传感器各自的电压与气流速度关系。 [0004] To solve the above problems, the present invention provides a method and a voltage for correcting the relationship between flow velocity mass flow rate sensor, the method comprising the following steps: First, the mass flow rate of the first sensor and the second sensor are respectively mass flow exhalation port disposed at the intake port and the anesthesia machine; step two, anesthesia machine is provided, the gas can only enter from the exhalation port and discharged from the suction port only; and step three different flow rates provided to the exhalation port gas stream according to the respective voltage value relationship between the voltage and the flow velocity of the first gas through mass flow sensor and a second mass flow sensor is corrected corresponding to the mass flow rate sensor while the first and second mass flow rate measured by the sensor, respectively, .

[0005] 其中,步骤二还包括:在手动模式下,堵住麻醉机中的呼吸回路中的手动皮囊接口,并将呼吸回路中的气路压力限制阀调到最大;以及摘掉呼吸回路中的活瓣罩内的吸气活瓣和呼气活瓣。 [0005] wherein two further comprising the step of: in a manual mode, block anesthesia machine in a manual bladder breathing circuit interface and the gas line pressure limiting valve in the breathing circuit to maximum; and remove the breathing circuit inspiratory and expiratory flap within the flap cover flap.

[0006] 步骤三还包括:将到达呼气口的气流速度调到预定速度,分别测量流过第一质量流量传感器和第二质量流量传感器的气体所对应的电压值,判断两个电压值的差是否大于预定值,如果大于预定值,则确定麻醉机出现故障,否则,同时对第一质量流量传感器和第二质量流量传感器各自的电压与气流速度关系进行校正。 [0006] Step Three further comprising: a gas flow velocity was adjusted to reach the predetermined speed of the exhalation port, were measured voltage value of the gas flowing through the first and second mass flow sensor of the mass flow rate sensor corresponding to the determined voltage values ​​of two difference is greater than a predetermined value, if greater than a predetermined value, it is determined anesthesia machine fails, otherwise, while the air flow rate of each of the voltage relationship between the first and second mass flow sensor is corrected mass flow sensor.

[0007] 对第一质量流量传感器和第二质量流量传感器各自的电压与气流速度关系进行校正包括:调节位于气源与呼气口之间的质量流量控制器,使气体分别以不同流速到达呼气口,并由麻醉机中的电气单元分别记录第一质量流量传感器和第二质量流量传感器在不同流速下的气流所对应的多个电压值,以同时更新记录在电气单元中的流经第一质量流量传感器和第二质量流量传感器各自的气流速度与所检测到的电压值之间的关系曲线。 [0007] The respective voltages of a first gas flow velocity relationship between mass flow rate sensor and the second sensor is corrected mass flow rate comprising: adjusting a mass flow controller positioned between a gas source and the exhalation port, the gas flow rates are different call arrival flowing through the first port, the anesthesia machine by means of electrical voltage values ​​are recorded a plurality of first and second mass flow rate sensor mass flow sensor of the air flow at different flow rates corresponding to simultaneously update records in the electrical unit curve between a mass flow sensor and a second sensor mass flow rate of each gas flow velocity and the detected voltage value.

[0008] 根据本发明的方法,预定速度为70L/min,预定值为500mV。 [0008] The method of the present invention, the predetermined rate of 70L / min, the predetermined value is 500mV.

[0009] 流经第一质量流量传感器和第二质量流量传感器各自的气流速度与所检测到的电压值之间的关系曲线在低流速情况下为非线性,在高流速情况下为线性。 The relationship between the curves [0009] The mass flow rate through the first sensor and the second sensor mass flow rate of each stream and the voltage value detected in the case of low linear velocity, at a high linear flow rates. [0010] 此外,在吸气口处接螺纹管。 [0010] Further, the intake pipe connected to the threaded opening.

[0011] 本发明具有以下有益效果: [0011] The present invention has the following advantages:

[0012] 采用本发明的方法,与单独校正相比,由于能够同时校正呼气流量传感器和吸气流量传感器,所以使校正保持更良好的一致性,提高校正的精度;同时还简化校正的方法, 减少不必要的工作量,提高校正的效率,并且进一步地克服了单独校正无法发现质量流量传感器损坏或曲线偏移的问题。 [0012] The method of the present invention, compared with the individual correction, it is possible to simultaneously correct inspiratory flow sensor and the expiratory flow sensor, so that the correction can maintain better consistency and improve the calibration accuracy; also a simplified method of correcting the , reduce unnecessary work, improve the efficiency of the correction, and further individual correction can not overcome the mass flow rate sensor found damaged or curve offset problems.

[0013] 本发明的其它特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显而易见,或者通过实施本发明而了解。 [0013] Other features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or learned by practice of the present invention. 本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。 The objectives and other advantages of the invention may be realized and attained by the written description, claims, and drawings structure particularly pointed out.

附图说明 BRIEF DESCRIPTION

[0014] 附图用来提供对本发明的进一步理解,并且构成说明书的一部分,与本发明的实施例一起用于解释本发明,并不构成对本发明的限制。 [0014] The accompanying drawings provide a further understanding of the present invention, and constitute part of this specification, the embodiments of the invention, serve to explain the invention, not to limit the present invention. 在附图中: In the drawings:

[0015] 图1是根据本发明方法的流程图;以及 [0015] FIG. 1 is a flowchart of a method according to the invention; and

[0016] 图2是麻醉机系统的框图。 [0016] FIG. 2 is a block diagram of an anesthesia machine systems.

具体实施方式 Detailed ways

[0017] 以下结合附图对本发明的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明。 [0017] Hereinafter, the preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0018] 图1是根据本发明方法的流程图。 [0018] FIG. 1 is a flowchart of a method according to the invention.

[0019] 如图1所示,该方法包括以下步骤: [0019] As shown in FIG 1, the method comprising the steps of:

[0020] S102,将第一质量流量传感器与第二质量流量传感器分别置于麻醉机的吸气口和呼气口处; [0020] S102, the mass flow rate of the first sensor and the second mass flow sensors were placed at the intake port and exhalation port anesthesia machine;

[0021] S104,设置麻醉机,使气体只能从呼气口进入并只能从吸气口排出;以及 [0021] S104, anesthesia machine is provided, the gas can only enter from the exhalation port and discharged from the suction port only; and

[0022] S106,向呼气口提供不同流速的气体,并根据所测量的分别流过第一质量流量传感器和第二质量流量传感器的气流所对应的电压值来同时校正第一质量流量传感器和第二质量流量传感器各自的电压与气流速度关系。 [0022] S106, supplying gas at different flow rates to the exhalation port, and to simultaneously correct the first mass flow rate sensor according to the voltage value flows through the first gas stream and a second mass flow sensor of the mass flow rate sensor corresponding to the respectively measured and a second mass flow sensor and air flow rate of each voltage relationship.

[0023] 其中,S104还包括:在手动模式下,堵住麻醉机中的呼吸回路中的手动皮囊接口, 并将呼吸回路中的气路压力限制阀调到最大;以及摘掉呼吸回路中的活瓣罩内的吸气活瓣和呼气活瓣。 [0023] wherein, S104 further comprising: manual mode, block anesthesia machine in a manual bladder breathing circuit interface and the gas line pressure limiting valve in the breathing circuit to maximum; and remove the breathing circuit inspiratory and expiratory flap in the flap cover flap.

[0024] S106还包括:将到达呼气口的气流速度调到预定速度,分别测量流过第一质量流量传感器和第二质量流量传感器的气体所对应的电压值,判断两个电压值的差是否大于预定值,如果大于预定值,则确定麻醉机出现故障,否则,同时对第一质量流量传感器和第二质量流量传感器各自的电压与气流速度关系进行校正。 [0024] S106 further comprising: a gas flow rate reaches a predetermined speed is adjusted to the exhalation port, a first difference voltage value flowing through the mass flow sensor and the second gas mass flow sensor corresponding to the determined voltage values ​​were measured two is greater than a predetermined value, if greater than a predetermined value, it is determined anesthesia machine fails, otherwise, while the air flow rate of each of the voltage relationship between the first and second mass flow sensor is corrected mass flow sensor.

[0025] 对第一质量流量传感器和第二质量流量传感器各自的电压与气流速度关系进行校正包括:调节位于气源与呼气口之间的质量流量控制器,使气体分别以不同流速到达呼气口,并由麻醉机中的电气单元分别记录第一质量流量传感器和第二质量流量传感器在不同流速下的气流所对应的多个电压值,以同时更新记录在电气单元中的流经第一质量流量传感器和第二质量流量传感器各自的气流速度与所检测到的电压值之间的关系曲线。 [0025] The respective voltages of a first gas flow velocity relationship between mass flow rate sensor and the second sensor is corrected mass flow rate comprising: adjusting a mass flow controller positioned between a gas source and the exhalation port, the gas flow rates are different call arrival flowing through the first port, the anesthesia machine by means of electrical voltage values ​​are recorded a plurality of first and second mass flow rate sensor mass flow sensor of the air flow at different flow rates corresponding to simultaneously update records in the electrical unit curve between a mass flow sensor and a second sensor mass flow rate of each gas flow velocity and the detected voltage value. [0026] 根据本发明的方法,预定速度为70L/min,预定值为500mV。 [0026] The method of the present invention, the predetermined rate of 70L / min, the predetermined value is 500mV.

[0027] 流经第一质量流量传感器和第二质量流量传感器各自的气流速度与所检测到的电压值之间的关系曲线在低流速情况下为非线性,在高流速情况下为线性。 The relationship between the curves [0027] The mass flow rate through the first sensor and the second sensor mass flow rate of each stream and the voltage value detected in the case of low linear velocity, at a high linear flow rates.

[0028] 此外,在吸气口处接螺纹管。 [0028] Further, the intake pipe connected to the threaded opening.

[0029] 接下来描述本发明的实施例。 [0029] Example embodiments of the present invention are described next.

[0030] 图2是麻醉机系统的框图。 [0030] FIG. 2 is a block diagram of an anesthesia machine systems.

[0031] 如图2所示,实现本实施例的设备为麻醉机系统,其包括呼吸回路、APL阀、质量流量控制器、电路模块,以及连接各模块和部件之间的管路和接线。 [0031] As shown in FIG 2, the present embodiment apparatus implement embodiments of anesthesia system, comprising piping and wiring between the breathing circuit, APL valves, mass flow controller, a circuit module, and connecting the modules and components.

[0032] 本实施例的原理为两个质量流量传感器分别位于吸气口和呼气口,用来监测吸气和呼气流速。 Principle [0032] The present embodiment is a two mass flow sensors are located in the intake port and exhalation port for monitoring inspiratory and expiratory flow. 堵住呼吸回路上除吸气口和呼气口外的所有接口,摘除吸气和呼气活瓣,使气流从呼气口进从吸气口出,且流速稳定。 In addition to blocking all breathing loop interfaces intake port and exhalation extraoral, removal flap inhalation and exhalation, the exhalation gas stream from the inlet port from the intake port, and the flow rate stable. 调节不同的流速,记录不同流速对应的两个质量流量传感器的电压值,则得到两个质量流量传感器的校正曲线。 Adjusting different flow rates, different flow rates corresponding to the recorded voltage values ​​of the two mass flow sensors, a calibration curve is obtained of the two mass flow sensors. 比较曲线上同一个点处的两个质量流量传感器的电压值,则可以对两个质量流量传感器的损坏或曲线偏移进行判断。 Comparing the voltage curve with two mass flow sensors at one point, the damage can be determined offset or curved two mass flow sensor.

[0033] 基于上述工作原理,本实施例包括以下步骤: [0033] Based on the above principle, this embodiment comprises the steps of:

[0034] (1)使两个质量流量传感器分别位于吸气口和呼气口,用来监测吸气和呼气流速; [0034] (1) the two mass flow sensors are located in the intake port and exhalation port for monitoring inspiratory and expiratory flow;

[0035] (2)将麻醉机切换到手动模式,堵住手动皮囊接口,气路压力限制(APL)阀调到最大,使麻醉机回路系统上除吸气口和呼气口外全部堵住不漏气,这样仅从呼气口进气从吸气口出气; [0035] (2) The anesthesia machine is switched to the manual mode, the interface block manual bladder, airway pressure limiting (APL) valve to maximum, the upper loop anesthesia machine systems other intake port is not blocked and expiratory all extraoral leakage, so that only the intake port exhalation air from the air inlet;

[0036] (3)摘掉活瓣罩内的吸气和呼气活瓣,使呼气口到吸气口的气路畅通,流速稳定; [0036] (3) remove the inspiratory and expiratory inner flap cover flap, so that the gas passage opening to the intake port of the exhalation flow, the flow rate stability;

[0037] (4)将稳定气源通过质量流量控制器接到呼气口上,用质量流量控制器来调节流速; [0037] (4) by the stable air mass flow controller connected to the exhalation port, with a mass flow controller regulating the flow rate;

[0038] (5)在吸气口处接一根1米长的螺纹管,使吸气口的气流稳定;以及 [0038] (5) connected to a one meter long threaded pipe at the intake port, the intake port of the air flow stability; and

[0039] (6)分别调节质量流量控制器使气流达到不同的速度,通过记录与不同流速对应的两个质量流量传感器的电压值,来获得两个质量流量传感器的校正曲线,比较同一个点处的两个质量流量传感器的电压值,根据比较的结果来对两个质量流量传感器的损坏或曲线偏移进行判断。 [0039] (6) mass flow controllers were adjusted to achieve a gas stream at different speeds, with different flow rates by recording a voltage value corresponding to two mass flow sensor, the calibration curve to obtain the two mass flow sensors, compared with a point two voltage values ​​at a mass flow sensor, according to the result of the comparison of the two curves or damage to the mass flow rate sensor offset determination.

[0040] 分别调节质量流量控制器使气流速度达到0L/min、lL/min、2L/min、3L/min、4L/ min、5L/min、6L/min、7L/min、8L/min、9L/min、10L/min、30L/min、50L/min、70L/mino 所选的质量流量传感器的特性在低流速时为非线性,在高流速时为线性,所以低流速时需要多标定几个点,高流速时可以只标定几个点。 [0040] The mass flow controllers were adjusted so that the airflow speed reaches 0L / min, lL / min, 2L / min, 3L / min, 4L / min, 5L / min, 6L / min, 7L / min, 8L / min, 9L / min, 10L / min, 30L / min, 50L / min, characteristic of the mass flow rate sensor 70L / mino selected non-linear at low flow rates, is linear at high flow rates, it is necessary to calibrate several multiple low flow rates point, high flow rates can be calibrated only a few points. 通过记录不同流速对应的两个质量流量传感器的电压值,来获得两个质量流量传感器的校正曲线。 By recording different flow rates corresponding to the voltage values ​​of the two mass flow sensors, to obtain a calibration curve of the two mass flow sensors. 比较同一个点处的两个质量流量传感器的电压值,根据比较的结果来对两个质量流量传感器的损坏或曲线偏移进行判断。 Compared with a two-point voltage value at the mass flow sensor, according to the result of the comparison of the two curves or damage to the mass flow rate sensor offset determination.

[0041 ] 综上所述,采用本发明的方法,与单独校正相比,由于能够同时校正呼气流量传感器和吸气流量传感器,所以使校正保持更良好的一致性,提高校正的精度;同时还简化校正的方法,减少不必要的工作量,提高校正的效率,并且进一步地克服了单独校正无法发现质量流量传感器损坏或曲线偏移的问题。 [0041] In summary, the method of the present invention, compared with the individual correction, it is possible to correct inspiratory flow sensor and the expiratory flow sensor simultaneously, the correction can maintain better consistency and improve the calibration accuracy; while the method of correction is also simplified, reducing unnecessary workload, to improve correction efficiency, and further individual correction can not overcome the mass flow rate sensor found damaged or curve offset problems.

[0042] 以上仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。 [0042] The above is merely illustrate the preferred embodiments of the present invention, not intended to limit the present invention, those skilled in the art, the present invention may have various changes and variations. 凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 Any modification within the spirit and principle of the present invention, made, equivalent substitutions, improvements, etc., should be included within the scope of the present invention.

Claims (7)

1. 一种校正质量流量传感器的电压与气流速度关系的方法,其特征在于,所述方法包括以下步骤:步骤一,将第一质量流量传感器与第二质量流量传感器分别置于麻醉机的吸气口和呼气口处;步骤二,设置所述麻醉机,使气体只能从所述呼气口进入并只能从所述吸气口排出;以及步骤三,向所述呼气口提供不同流速的气体,并根据所测量的分别流过所述第一质量流量传感器和所述第二质量流量传感器的气流所对应的电压值来同时校正所述第一质量流量传感器和所述第二质量流量传感器各自的电压与气流速度关系。 Voltage flow velocity relationship 1. A method of correcting the mass flow sensor, characterized in that the method comprises the following steps: Step one, the first mass flow rate sensor and the second mass flow sensors were placed suction anesthetic machine mouth and exhalation port; step two, the anesthesia machine is provided, the gas can only enter from the exhalation port and discharged from the suction port only; and step three, providing the exhalation port different flow rates of gases, and in accordance with the measured flow through each voltage value of the first sensor and the mass flow rate of the second gas stream mass flow rate sensor while correcting corresponding to said first and said second mass flow rate sensor mass flow sensor and air flow rate of each voltage relationship.
2.根据权利要求1所述的方法,其特征在于,所述步骤二还包括:在手动模式下,堵住所述麻醉机中的呼吸回路中的手动皮囊接口,并将所述呼吸回路中的气路压力限制阀调到最大;以及摘掉所述呼吸回路中的活瓣罩内的吸气活瓣和呼气活瓣。 2. The method according to claim 1, characterized in that said two further comprising the step of: in a manual mode, a manual bladder block anesthesia machine interface of the breathing circuit, the breathing circuit and the pressure limiting valve air passage to maximum; and remove the flap inspiratory and expiratory respiratory flap within the flap shroud circuit.
3.根据权利要求2所述的方法,其特征在于,所述步骤三还包括:将到达所述呼气口的气流速度调到预定速度,分别测量流过所述第一质量流量传感器和所述第二质量流量传感器的气流所对应的电压值,判断两个电压值的差是否大于预定值,如果大于所述预定值,则确定所述麻醉机出现故障,否则,同时对所述第一质量流量传感器和所述第二质量流量传感器各自的电压与气流速度关系进行校正。 3. The method according to claim 2, wherein said three further comprising the step of: the gas flow velocity was adjusted to reach the predetermined speed of the exhalation port, were measured flowing through the flow sensor and the first mass said second mass flow rate sensor voltage value corresponding to the gas flow, the voltage difference between the two values ​​determined is greater than a predetermined value, if greater than the predetermined value, it is determined that the anesthetic machine failure, otherwise, while the first and the respective mass flow sensor voltage relationship of the second flow velocity sensor is corrected mass flow rate.
4.根据权利要求3所述的方法,其特征在于,对所述第一质量流量传感器和所述第二质量流量传感器各自的电压与气流速度关系进行校正包括:调节位于气源与所述呼气口之间的质量流量控制器,使气体分别以所述不同流速到达所述呼气口,并由所述麻醉机中的电气单元分别记录所述第一质量流量传感器和所述第二质量流量传感器在所述不同流速下的气流所对应的多个电压值,以同时更新记录在所述电气单元中的流经所述第一质量流量传感器和所述第二质量流量传感器各自的气流速度与所检测到的电压值之间的关系曲线。 4. The method according to claim 3, wherein each of the voltage relationship between the first gas flow rate and the second mass flow sensor is corrected mass flow sensor comprising: adjusting the respiratory gas source is located mass flow controller between the air inlet and the gas flow rate respectively reaching the different said exhalation port, said anesthesia machine by electric means are recorded in the first mass and the second mass flow rate sensor a plurality of flow rate sensor voltage values ​​in the stream at different flow rates corresponding to simultaneously updating the record of the electric unit through the first mass flow sensor and the second sensor mass flow rate of each stream the relationship between the voltage curve and the detected values.
5.根据权利要求4所述的方法,其特征在于,所述预定速度为70L/min,所述预定值为500mV。 5. The method as claimed in claim 4, wherein said predetermined rate is 70L / min, the predetermined value is 500mV.
6.根据权利要求5所述的方法,其特征在于,流经所述第一质量流量传感器和所述第二质量流量传感器各自的气流速度与所检测到的电压值之间的关系曲线在低流速情况下为非线性,在高流速情况下为线性。 6. The method according to claim 5, characterized in that the relationship curve between the mass flow through the first sensor and the second sensor mass flow rate of each gas flow velocity and the voltage value detected at low where the flow rate is non-linear at high linear flow rates.
7.根据前述权利要求中任一项所述的方法,其特征在于,在所述吸气口处接螺纹管。 7. A method according to any one of the claims, characterized in that the threaded tube connected to the suction mouth.
CN 200810115690 2008-06-26 2008-06-26 Method for correcting relation of voltage and airflow speed of mass flow sensor CN101614575B (en)

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CN104874057A (en) * 2014-02-28 2015-09-02 北京谊安医疗系统股份有限公司 Respirator fault detection method and system
CN105371925A (en) * 2014-08-08 2016-03-02 北京谊安医疗系统股份有限公司 An anaesthesia machine flow sensor calibration method
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