CN106969876B - A dynamic total pressure probe with temperature correction - Google Patents
A dynamic total pressure probe with temperature correction Download PDFInfo
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- CN106969876B CN106969876B CN201710198363.4A CN201710198363A CN106969876B CN 106969876 B CN106969876 B CN 106969876B CN 201710198363 A CN201710198363 A CN 201710198363A CN 106969876 B CN106969876 B CN 106969876B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
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- G—PHYSICS
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L2019/0053—Pressure sensors associated with other sensors, e.g. for measuring acceleration, temperature
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Abstract
本发明属于温度、压力测试技术领域，公开了一种自带温度修正的动态总压探针。该探针包含探针头部和支杆(1)，探针头部圆柱面上开有压力孔(2)和温度传感器安装孔(3)，动态压力传感器安装在探针头部内靠近压力孔(2)的位置，温度传感器受感部安装在温度传感器安装孔(3)上，温度传感器引线(4)和压力传感器引线(5)由支杆(1)内部引出。现有的压力探针和温度探针相比，本发明经过标定，能够同时测量来流的温度，总压参数，由于组合探针尺寸相比于传统探针较小，有效降低了对流场的影响，同时还能利用温度测量结果修正总压测量，提高了测量结果的准确性。
The invention belongs to the technical field of temperature and pressure testing, and discloses a dynamic total pressure probe with temperature correction. The probe comprises a probe head and a support rod (1), a pressure hole (2) and a temperature sensor mounting hole (3) are opened on the cylindrical surface of the probe head, and the dynamic pressure sensor is installed in the probe head close to the pressure At the position of the hole (2), the sensing part of the temperature sensor is installed on the installation hole (3) of the temperature sensor, and the lead wire (4) of the temperature sensor and the lead wire (5) of the pressure sensor are led out from the inside of the support rod (1). Compared with the existing pressure probe and the temperature probe, the present invention is calibrated and can measure the temperature and total pressure parameters of the incoming flow at the same time. Since the size of the combined probe is smaller than that of the traditional probe, the convection field is effectively reduced. At the same time, the temperature measurement results can be used to correct the total pressure measurement, which improves the accuracy of the measurement results.
Description
技术领域technical field
本发明属于压力温度测试技术领域，涉及一种自带温度修正的动态总压探针，本发明可以同时测量流体的温度和动态总压参数，同时还可以对总压测量结果进行温度修正。The invention belongs to the technical field of pressure and temperature testing, and relates to a dynamic total pressure probe with temperature correction.
背景技术Background technique
温度和压力是流场的两个重要参数。压力探针，以其结构简单、结实耐用、易于操作等优点广泛应用于流场测量，而热电偶、热电阻则是温度测量的主要技术手段。然而，传统的压力探针或者温度探针只能对流场进行单一参数的测量，多参数的测量主要依赖多种探针的同时使用。航空发动机内部结构复杂，而且转子内部以及转/静间的轴向和径向空间十分狭窄，探针的使用尤其是多只探针同时使用不可避免地会对流场产生影响，造成堵塞现象，影响测量精度。Temperature and pressure are two important parameters of the flow field. Pressure probes are widely used in flow field measurement due to their simple structure, robustness and durability, and easy operation. Thermocouples and thermal resistances are the main technical means of temperature measurement. However, traditional pressure probes or temperature probes can only measure a single parameter of the flow field, and multi-parameter measurement mainly relies on the simultaneous use of multiple probes. The internal structure of the aero-engine is complex, and the axial and radial spaces inside the rotor and between the rotor and the static are very narrow. The use of probes, especially the simultaneous use of multiple probes, will inevitably affect the flow field and cause blockage. affect the measurement accuracy.
动态压力的测量过程中为了保证传感器的频响一般将传感器安装在探针头部，距离被测流场比较近，当流场温度变化剧烈时压力传感器可能会发生温度漂移，影响测量结果的准确性。因此，目前科学研究和实际工程应用中缺乏能兼顾多参数测量和温度修正的动态压力探针技术。In the process of dynamic pressure measurement, in order to ensure the frequency response of the sensor, the sensor is generally installed on the probe head, which is relatively close to the measured flow field. When the temperature of the flow field changes drastically, the pressure sensor may experience temperature drift, which affects the accuracy of the measurement results. sex. Therefore, there is currently a lack of dynamic pressure probe technology that can take into account multi-parameter measurement and temperature correction in scientific research and practical engineering applications.
发明内容SUMMARY OF THE INVENTION
本发明主要解决的技术问题是：针对目前科学研究和实际工程应用中缺乏能兼顾多参数测量和温度修正的动态压力探针技术，采用组合探针同时获得流场温度和动态总压等参数，减少多个探针对流场造成的不利影响，修正温度对压力传感器的不利影响，提高测量结果的准确性。The main technical problem solved by the present invention is: in view of the lack of dynamic pressure probe technology that can take into account multi-parameter measurement and temperature correction in current scientific research and practical engineering applications, the combined probe is used to obtain parameters such as flow field temperature and dynamic total pressure at the same time, Reduce the adverse effect of multiple probes on the flow field, correct the adverse effect of temperature on the pressure sensor, and improve the accuracy of the measurement results.
本发明的技术解决方案是：The technical solution of the present invention is:
本发明包含探针头部、支杆(1)，探针头部包含压力孔(2)和温度传感器安装孔(3)。温度传感器引线(4)和压力传感器引线(5)由支杆(1)内部引出。The present invention comprises a probe head, a support rod (1), and the probe head comprises a pressure hole (2) and a temperature sensor installation hole (3). The lead wire (4) of the temperature sensor and the lead wire (5) of the pressure sensor are led out from the inside of the support rod (1).
进一步，探针支杆(1)为圆柱柱状中空结构，支杆(1)直径选择4到10毫米，支杆(1)内径比外径小1毫米。Further, the probe support rod (1) is a cylindrical hollow structure, the diameter of the support rod (1) is 4 to 10 mm, and the inner diameter of the support rod (1) is 1 mm smaller than the outer diameter.
进一步，压力孔(2)与温度传感器安装孔(3)大小一致，孔径0.1到5毫米，两孔位于探针头部圆柱面同一周向位置，两孔圆心距离为1.2到1.5倍孔径，压力孔(2)可在温度传感器安装孔(3)上方或者下方。Further, the pressure hole (2) is the same size as the temperature sensor mounting hole (3), the diameter of which is 0.1 to 5 mm, the two holes are located at the same circumferential position on the cylindrical surface of the probe head, and the distance between the centers of the two holes is 1.2 to 1.5 times the diameter of the hole. The hole (2) can be above or below the temperature sensor mounting hole (3).
进一步，温度传感器受感部安装在温度传感器安装孔(3)上，压力传感器安装在探针头部内靠近压力孔(2)的位置。Further, the temperature sensor sensing part is installed on the temperature sensor installation hole (3), and the pressure sensor is installed in the probe head at a position close to the pressure hole (2).
进一步，温度传感器选择热电偶或者热电阻。Further, the temperature sensor selects a thermocouple or a thermal resistance.
本发明的有益效果是：不仅对被测流场的影响较小，能同时获得流场的总温总压参数，而且能够对动态压力测量结果进行温度修正，提高了测量结果的准确性。The invention has the beneficial effects that not only has less influence on the measured flow field, but also can obtain the total temperature and total pressure parameters of the flow field at the same time, and can perform temperature correction on the dynamic pressure measurement result, thereby improving the accuracy of the measurement result.
附图说明Description of drawings
图1是一种自带温度修正的动态总压探针示意图。Figure 1 is a schematic diagram of a dynamic total pressure probe with temperature correction.
其中，1-探针支杆，2-压力孔，3-温度传感器安装孔，4-温度传感器引线，5-压力传感器引线。Among them, 1-probe rod, 2-pressure hole, 3-temperature sensor mounting hole, 4-temperature sensor lead wire, 5-pressure sensor lead wire.
具体实施方式Detailed ways
下面结合附图和具体实施例对本发明进行详细阐述。The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
如图1所示，本发明包含探针头部、支杆(1)，探针头部包含压力孔(2)和温度传感器安装孔(3)。温度传感器引线(4)和压力传感器引线(5)由支杆(1)内部引出。As shown in Fig. 1, the present invention includes a probe head, a support rod (1), and the probe head includes a pressure hole (2) and a temperature sensor installation hole (3). The lead wire (4) of the temperature sensor and the lead wire (5) of the pressure sensor are led out from the inside of the support rod (1).
探针支杆(1)为圆柱柱状中空结构，支杆(1)直径选择4毫米，支杆(1)内径比外径小1毫米。The probe support rod (1) is a cylindrical hollow structure, the diameter of the support rod (1) is 4 mm, and the inner diameter of the support rod (1) is 1 mm smaller than the outer diameter.
压力孔(2)与温度传感器安装孔(3)大小一致，孔径0.4毫米，两孔位于探针头部圆柱面同一周向位置，两孔圆心距离为1.2孔径，两安装孔位置可互换。The pressure hole (2) is the same size as the temperature sensor mounting hole (3), with a diameter of 0.4 mm. The two holes are located at the same circumferential position on the cylindrical surface of the probe head.
温度传感器受感部安装在温度传感器安装孔(3)上，压力传感器安装在探针头部内靠近压力孔(2)的位置。The temperature sensor sensing part is installed on the temperature sensor installation hole (3), and the pressure sensor is installed in the probe head at a position close to the pressure hole (2).
温度传感器选择热电偶。The temperature sensor selects a thermocouple.
本发明实施例中介绍的一种自带温度修正的动态总压探针，经过校准标定，可以获得标定数据。实际流场测量时，通过压力传感器的引线可以获得压力传感器电压信号，通过温度传感器引线可以获得温度传感器的电压信号，利用获得的标定数据，进行数据处理，可以获得流场的温度、动态总压等稳态信息，同时能对动态压力测量结果进行温度修正。A dynamic total pressure probe with temperature correction introduced in the embodiment of the present invention can obtain calibration data after calibration and calibration. In the actual flow field measurement, the voltage signal of the pressure sensor can be obtained through the lead of the pressure sensor, the voltage signal of the temperature sensor can be obtained through the lead of the temperature sensor, and the temperature and dynamic total pressure of the flow field can be obtained by data processing using the obtained calibration data. and other steady-state information, and at the same time, it can perform temperature correction on the dynamic pressure measurement results.
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| CN111366296B (en) * | 2020-05-07 | 2024-09-24 | 北京航空航天大学 | A steady-state pressure probe using plasma jet to reduce support rod interference |
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| CN201662459U (en) * | 2009-09-07 | 2010-12-01 | 天津空中代码工程应用软件开发有限公司 | Combined measuring tool for flow field pressure and speed |
| CN101788313B (en) * | 2010-03-23 | 2011-06-29 | 上海交通大学 | High Response Fluid Transient Flowmeter |
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Application publication date: 20170721 Assignee: Yangcan (Beijing) Technology Development Co.,Ltd. Assignor: BEIHANG University Contract record no.: X2025980004930 Denomination of invention: A dynamic total pressure probe with built-in temperature correction Granted publication date: 20200925 License type: Common License Record date: 20250310 |