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Apparatus for testing response speed of sensor, and test method thereof

A technology of response speed and sensor to be tested, which is applied to the construction details of measuring devices, gas analyzers, instruments, etc., can solve the problem of difficulty in obtaining response speed in milliseconds or microseconds, inability to accurately characterize the real performance of devices, and test systems Problems such as inability to be used universally achieve the effect of novel test methods, improved scope of use, and clear principles

Active Publication Date: 2018-10-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These systems generally have a slow response of the system itself, which cannot accurately characterize the real performance of the device; the system is complex in structure, inconvenient to use, and difficult to maintain; the performance is unstable; the test system cannot be used universally; Better cavity fast response and other disadvantages
For example, moving the sample quickly or using a fast gas valve will introduce mechanical and electromagnetic disturbances, which will be detrimental to the test results
It is also difficult for its own testing mechanism or organization to obtain a response speed of milliseconds or microseconds

Method used

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  • Apparatus for testing response speed of sensor, and test method thereof
  • Apparatus for testing response speed of sensor, and test method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a device for testing the response speed of a sensor includes three sets of air intake mechanisms, a test cavity, an air intake channel, and an exhaust mechanism. The air intake channels and exhaust mechanisms are respectively located on both sides of the test cavity. A reference sensor is provided in the test chamber, a sample holder is provided at the bottom, a temperature regulator, a position regulator and a sensor to be tested are provided on the sample holder; an air inlet extending into the test chamber is provided above the sample holder mechanism, the air intake structure includes an air supply tank, an air guide tube, a valve 2, an air guide tube azimuth adjustment mechanism, a valve 1 and a nozzle, and the air supply tank communicates with the valve 2, valve 1 and nozzle in sequence through the air guide tube The airway azimuth adjustment structure, valve 1 and nozzle are all in the test chamber, and the airway azimuth adjustment mec...

Embodiment 2

[0025] A test method for a device for testing the response speed of a sensor includes the following steps: Step 1, using software to simulate the size of the nozzle, the relative position of the nozzle and the sensor to be tested, and the switching speed of the valve 1, that is, analyze the pressure at the nozzle according to the fluid mechanics method Uniformity, so as to determine the size of the nozzle, the relative position of the nozzle and the sensor to be tested, and the switching speed of valve 1; step 2, connect all test signals; prepare to test the target gas and background gas, according to the analysis, select a nozzle with a suitable size and shape, and the size of the nozzle should be It is larger than the size of the sensitive surface of the sensor to be tested to ensure that the ejected gas can cover the entire sensing surface area; step 3, the background gas is introduced into the test cavity from the air inlet channel until the background gas is distributed sta...

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Abstract

The invention discloses an apparatus for testing the response speed of a sensor, and a test method thereof. The apparatus comprises at least a set of a test chamber, a gas inlet mechanism and a gas discharge mechanism, wherein a reference sensor and a sample holder are arranged in the test chamber, the position and the temperature of the sample holder can be adjusted, the gas inlet mechanism is arranged above the sample holder, and is sequentially communicated to a valve 2, a valve 1 and a spraying nozzle through a gas supply tank, and a gas guiding pipe orientation adjustment mechanism is positioned on a gas guiding pipe between the valve 2 and the valve 1 and is positioned inside the test chamber. According to the present invention, before the test, the position of the component and theopening degrees of each valve are determined by a software simulation device, all the test signals are connected, a background gas is introduced into the test chamber from a gas inlet hole channel, the test value of the sensor device is read, the relative position of the to-be-tested sensor and the spraying nozzle is adjusted, a to-be-tested target gas is sprayed, and the transient state responseof the to-be-tested sensor is tested; and the structure of the apparatus is simple, and the method is novel and efficient, and is not limited by the use environment.

Description

technical field [0001] The invention belongs to the technical field of advanced sensitive device testing, and in particular relates to a device for testing the response speed of a sensor and a testing method thereof. Background technique [0002] Sensors are widely used in daily life, high-tech applications and other fields and play an important role. One of the factors affecting the performance of the sensor depends on the response speed of the sensor, so the fast response of the sensor device is very important. Conventional gas sensing devices usually have a response speed of "second" level. It is suitable for some applications. For example, the detection of harmful gases in daily life does not require a very fast detection speed. However, it is not suitable for high-speed, large dynamic range, and fast response occasions, especially for millisecond or microsecond-level response occasions. At this time, it is necessary to develop sensor devices with fast response for...

Claims

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Application Information

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IPC IPC(8): G01N33/00
CPCG01N33/007G01N33/0072
Inventor 万能赵小康徐康邵志勇
Owner SOUTHEAST UNIV
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