Oxygen monitor and oxygen concentrator supporting self-detection of oxygen partial pressure sensor

Abstract

The invention provides an oxygen monitor and an oxygen concentrator supporting self-detection of an oxygen partial pressure sensor. The oxygen monitor comprises a self-detection gas circuit, an electromagnetic valve, the oxygen partial pressure sensor and a control unit, an inlet of the self-detection gas path is connected with an onboard compressed air pipeline, an outlet of the self-detection gas path is connected with the oxygen partial pressure sensor through a first inlet of the electromagnetic valve, and a second inlet of the electromagnetic valve receives concentrated product gas; the control unit is connected with the electromagnetic valve and is used for opening a first inlet of the electromagnetic valve, closing a second inlet of the electromagnetic valve and communicating an onboard compressed air pipeline with the oxygen partial pressure sensor for self-detection when self-detection is needed; and when self-detection is not needed, the first inlet of the electromagnetic valve is closed, and the second inlet of the electromagnetic valve is opened. A detection gas circuit is additionally arranged on a structural part, so that in-situ oxygen partial pressure sensor precision detection of a product can be realized on a machine, the oxygen partial pressure sensors are ensured to be qualified products in the flight process, and the oxygen partial pressure sensors are detected outside a regular checking period of the product.

Description

Technical Field

[0001] The invention belongs to the field of oxygen subsystem of aircraft system, and relates to an oxygen monitor and an oxygen concentrator supporting self-detection of an oxygen partial pressure sensor. Background Art

[0002] The oxygen monitor is a component of the oxygen concentrator. It is used to detect the oxygen partial pressure during the oxygen production process of the oxygen concentrator. The high-concentration oxygen generated in the oxygen production process of the oxygen concentrator is introduced into the oxygen monitor to detect the oxygen partial pressure in the gas. Therefore, when the oxygen monitor detects high-concentration gas, there are certain requirements for the accuracy of the oxygen partial pressure sensor inside the oxygen monitor. Once the detection error of the oxygen partial pressure sensor deviates too much, the detection result of the oxygen monitor will be inaccurate, causing some misjudgments. Summary of the invention

[0003] The purpose of the present invention is to propose an oxygen monitor and an oxygen concentrator with oxygen partial pressure sensor self-detection technology, to add a detection gas path to the structural parts so that the product can realize in-situ oxygen partial pressure sensor accuracy detection on the aircraft, to ensure that the oxygen partial pressure sensors are all qualified products during the flight, and to detect the oxygen partial pressure sensors outside the product regular inspection cycle.

[0004] The present invention provides an oxygen monitor supporting self-detection of an oxygen partial pressure sensor, comprising: a self-detection gas circuit, a solenoid valve, an oxygen partial pressure sensor and a control unit;

[0005] The inlet of the self-detection gas circuit is connected to the compressed air pipeline on the aircraft, the outlet of the self-detection gas circuit is connected to the oxygen partial pressure sensor through the first inlet of the solenoid valve, and the second inlet of the solenoid valve receives the concentrated product gas;

[0006] The control unit is connected to the solenoid valve and is used to open the first inlet of the solenoid valve and close the second inlet of the solenoid valve when self-detection is required, connect the on-board compressed air pipeline with the oxygen partial pressure sensor, and perform self-detection; when self-detection is not required, close the first inlet of the solenoid valve and open the second inlet of the solenoid valve.

[0007] Optionally, the control unit is also connected to an oxygen partial pressure sensor;

[0008] The control unit is specifically used to obtain the oxygen partial pressure detection result of the oxygen partial pressure sensor on the compressed air pipeline on the aircraft when self-detection is required, compare the oxygen partial pressure detection result with the preset threshold range, and determine whether the self-detection is passed.

[0009] Optionally, the control unit is specifically configured to determine that the self-test has passed when the oxygen partial pressure test result is within a preset threshold range.

[0010] Optionally, the control unit is specifically configured to receive a self-detection instruction input by a user, and upon receiving the self-detection instruction, determine that a self-detection is required.

[0011] Optionally, the control unit is specifically used to determine that self-detection is required when it is detected that the wheel-borne signal indicates the ground, the cumulative flight time is greater than a preset cumulative time, and the engine is in a started state.

[0012] Optionally, the preset cumulative duration is 100 hours.

[0013] Optionally, the oxygen monitor is in the shape of a square box, and the self-detection gas circuit, solenoid valve, oxygen partial pressure sensor and control unit are arranged in the square box.

[0014] The present invention also provides an oxygen concentrator, comprising the oxygen monitor according to any one of the first aspects.

[0015] The present invention provides an oxygen monitor and an oxygen concentrator supporting self-detection of an oxygen partial pressure sensor. The oxygen monitor with the self-detection technology of the oxygen partial pressure sensor can automatically detect the oxygen partial pressure sensor after the oxygen monitor has worked for a certain period of time, and screen out oxygen partial pressure sensors with unqualified accuracy, thereby improving the quality of the product and reducing false alarms. The present invention has the advantages that during the actual flight of an aircraft, the product can ensure in real time that the oxygen partial pressure sensor is detected before each flight, ensure that the detection accuracy of the oxygen partial pressure sensor meets the use requirements, and reduce the false alarm rate on board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 Diagram of internal piping layout of oxygen monitor;

[0018] Figure 2 Software detection control logic principle block diagram. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. The following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the protection scope of the specific claims of the present invention.

[0020] The oxygen monitor supporting the self-detection of the oxygen partial pressure sensor provided by the present invention is explained below with reference to the accompanying drawings.

[0021] The present invention provides an oxygen monitor supporting self-detection of an oxygen partial pressure sensor, comprising: a self-detection gas circuit, a solenoid valve, an oxygen partial pressure sensor and a control unit;

[0022] The inlet of the self-detection gas circuit is connected to the compressed air pipeline on the aircraft, the outlet of the self-detection gas circuit is connected to the oxygen partial pressure sensor through the first inlet of the solenoid valve, and the second inlet of the solenoid valve receives the concentrated product gas;

[0023] The control unit is connected to the solenoid valve and is used to open the first inlet of the solenoid valve and close the second inlet of the solenoid valve when self-detection is required, connect the on-board compressed air pipeline with the oxygen partial pressure sensor, and perform self-detection; when self-detection is not required, close the first inlet of the solenoid valve and open the second inlet of the solenoid valve.

[0024] Optionally, the control unit is also connected to an oxygen partial pressure sensor;

[0025] The control unit is specifically used to obtain the oxygen partial pressure detection result of the oxygen partial pressure sensor on the compressed air pipeline on the aircraft when self-detection is required, compare the oxygen partial pressure detection result with the preset threshold range, and determine whether the self-detection is passed.

[0026] Optionally, the control unit is specifically configured to determine that the self-test has passed when the oxygen partial pressure test result is within a preset threshold range.

[0027] Optionally, the control unit is specifically configured to receive a self-detection instruction input by a user, and upon receiving the self-detection instruction, determine that a self-detection is required.

[0028] Optionally, the control unit is specifically used to determine that self-detection is required when it is detected that the wheel-borne signal indicates the ground, the cumulative flight time is greater than a preset cumulative time, and the engine is in a started state.

[0029] Optionally, the preset cumulative duration is 100 hours.

[0030] Optionally, the oxygen monitor is in the shape of a square box, and the self-detection gas circuit, solenoid valve, oxygen partial pressure sensor and control unit are arranged in the square box.

[0031] like Figure 1 and 2As shown, the present invention provides an oxygen monitor with oxygen partial pressure sensor self-detection technology. A self-detection air circuit is added inside the monitor for product self-detection. The self-detection air inlet is connected to the on-board compressed air pipeline. At this time, the electromagnetic control of the air circuit is in a closed stage. When the actual work reaches 100 flight hours and is on the ground, the product reaches the on-board self-detection condition, and the solenoid valve is opened using software control. Then the software enters the self-detection mode, and the oxygen partial pressure value in the current compressed gas is collected through the oxygen partial pressure sensor, and the value is compared with the standard threshold value. If it is within the threshold range, it is determined that the oxygen partial pressure sensor has passed the self-detection, otherwise it has not passed.

[0032] The technical solution of the present invention is: an oxygen monitor with oxygen partial pressure sensor self-detection technology, based on the optimized design of the structural design, so that this type of oxygen monitor can realize the self-detection function of the oxygen partial pressure sensor on the aircraft, and its main application functions are as follows:

[0033] 1) Design a detection gas channel, connect it to the compressed air pipeline on the aircraft, and when the oxygen monitor needs to self-detect, turn on the internal gas circuit switch of the oxygen monitor to pass the self-detection gas into the oxygen monitor.

[0034] 2) Design the on-off control of the solenoid valve switch of the software to detect the switch of the air circuit and the oxygen partial pressure sensor to collect and compare with the set threshold, and judge whether the self-detection is passed based on the comparison error.

[0035] It has the functions of state selection and state monitoring.

[0036] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An oxygen monitor supporting self-detection of oxygen partial pressure sensor, characterized in that: include: Self-test gas circuit, solenoid valve, oxygen partial pressure sensor and control unit; The inlet of the self-detection gas circuit is connected to the compressed air pipeline on the aircraft, the outlet of the self-detection gas circuit is connected to the oxygen partial pressure sensor through the first inlet of the solenoid valve, and the second inlet of the solenoid valve receives the concentrated product gas; The control unit is connected to the solenoid valve and is used to open the first inlet of the solenoid valve and close the second inlet of the solenoid valve when self-detection is required, connect the on-board compressed air pipeline with the oxygen partial pressure sensor, and perform self-detection; when self-detection is not required, close the first inlet of the solenoid valve and open the second inlet of the solenoid valve.

2. The oxygen monitor according to claim 1, characterized in that: The control unit is also connected to the oxygen partial pressure sensor; The control unit is specifically used to obtain the oxygen partial pressure detection result of the oxygen partial pressure sensor on the compressed air pipeline on the aircraft when self-detection is required, compare the oxygen partial pressure detection result with the preset threshold range, and determine whether the self-detection is passed.

3. The oxygen monitor according to claim 2, characterized in that: The control unit is specifically configured to determine that the self-test has passed when the oxygen partial pressure test result is within a preset threshold range.

4. The oxygen monitor according to claim 1, characterized in that: The control unit is specifically used to receive a self-detection instruction input by a user, and when receiving the self-detection instruction, determine that a self-detection is required.

5. The oxygen monitor according to claim 1, characterized in that: The control unit is specifically used to determine that self-detection is required when it is detected that the wheel-load signal indicates the ground, the cumulative flight time is greater than a preset cumulative time, and the engine is in a starting state.

6. The oxygen monitor according to claim 5, characterized in that: The preset cumulative duration is 100 hours.

7. The oxygen monitor according to claim 1, characterized in that: The oxygen monitor is in the shape of a square box, and a self-detection gas circuit, a solenoid valve, an oxygen partial pressure sensor and a control unit are arranged in the square box.

8. An oxygen concentrator, characterized in that: Comprising an oxygen monitor as claimed in any one of claims 1-7.

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