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CN-224231099-U - Testing device for warm air resistance test of infrared lane detector

CN224231099UCN 224231099 UCN224231099 UCN 224231099UCN-224231099-U

Abstract

The application provides a testing device for an infrared lane detector warm-air resistance test, which comprises a first temperature measuring device, a box body, a controller, a second temperature measuring device, a blowing device and a heating device, wherein the blowing device is used for generating air flow to guide air in the box body into a test space, the heating device is used for heating the air in the box body, the first temperature measuring device is used for measuring the ambient temperature in the test space and sending the ambient temperature to the controller, the second temperature measuring device is used for measuring the air flow temperature of the air flow generated by the blowing device and sending the air flow temperature to the controller, the controller is used for receiving the ambient temperature and the air flow temperature and calculating the current temperature rising rate of the test space according to the ambient temperature and the air flow temperature, and the heating power of the heating device is adjusted according to the temperature rising rate to control the temperature rising rate of the test space to be a target rate. The test device can maintain stable temperature rising rate and improve the reliability of test results.

Inventors

  • ZHANG YUANBIN

Assignees

  • 深圳市安室智能有限公司

Dates

Publication Date
20260512
Application Date
20250703

Claims (10)

  1. 1. The testing device for the warm air resistance test of the infrared lane detector is characterized by comprising a first temperature measuring device, a box body and a controller, wherein the box body comprises a second temperature measuring device, a blowing device and a heating device, the first temperature measuring device, the second temperature measuring device, the blowing device and the heating device are respectively connected with the controller, and the testing device comprises: the air blowing device is used for generating air flow to guide the air in the box body into the test space; the heating equipment is used for heating the air in the box body; the first temperature measurement device is used for measuring the ambient temperature in the test space and sending the ambient temperature to the controller; The second temperature measuring device is used for measuring the air flow temperature of the air flow generated by the air blowing device and sending the air flow temperature to the controller; The controller is used for receiving the environment temperature and the air flow temperature and calculating the current temperature rising rate of the test space according to the environment temperature and the air flow temperature; And adjusting the heating power of the heating equipment according to the heating rate so as to control the heating rate of the test space to be a target rate.
  2. 2. The test device of claim 1, further comprising a wind speed measurement apparatus, wherein the blower apparatus further comprises an adjustable fan, wherein the wind speed measurement apparatus and the adjustable fan are each connected to the controller; The wind speed measuring device is used for measuring the real-time wind speed of the air flow generated by the air blowing device and sending the real-time wind speed to the controller; the controller is further used for receiving the real-time wind speed and controlling the adjustable fan to maintain the air flow generated by the air blowing device at a target wind speed according to the real-time wind speed.
  3. 3. The test device according to claim 2, wherein the blower apparatus further comprises a ventilation pipe installed outside the case for communicating the case and the test space.
  4. 4. A testing device according to claim 3, wherein the ventilation tube is a hose, and the ventilation tube is further adapted to adjust the direction and the height of the air flow generated by the blower device.
  5. 5. The test apparatus of claim 1, wherein the housing further comprises a third temperature measurement device and a heat sink device, the third temperature measurement device and the heat sink device being respectively coupled to the controller, wherein: The third temperature measurement device is used for measuring the box temperature of the box and sending the box temperature to the controller; The controller is also used for acquiring the temperature of the box body and judging whether the temperature in the box body is too high according to the temperature of the box body; The heat dissipation device is used for dissipating heat of the box body under the condition that the temperature in the box body is too high.
  6. 6. The test apparatus according to claim 5, wherein the heat dissipating device includes a heat dissipating fan for generating an air flow to introduce air in the case into the heat dissipating space, an air temperature adjusting device for cooling air in the heat dissipating space, and a test apparatus according to claim 5.
  7. 7. The test device of any one of claims 1-6, further comprising a thermal shield mounted to a test surface of the housing, the test surface being an outer surface of a side of the housing facing the test space.
  8. 8. The test device of any one of claims 1-6, further comprising an air pressure measurement apparatus, the air pressure measurement apparatus being coupled to the controller; The air pressure measuring equipment is used for acquiring air pressure data and sending the air pressure data to the controller; The controller is also used for receiving the air pressure data, adjusting the heating equipment and/or adjusting the air blast equipment according to the air pressure data, and controlling the temperature rising rate of the ambient temperature to be a target rate.
  9. 9. The test apparatus of any one of claims 1-6, wherein the first temperature measurement device is a type K thermocouple thermometer.
  10. 10. The test apparatus according to claim 5 or 6, wherein the second temperature measuring device and the third temperature measuring device are thermistor thermometers.

Description

Testing device for warm air resistance test of infrared lane detector Technical Field The application relates to the technical field of infrared sensor testing, in particular to a testing device for testing the warm air resistance of an infrared lane detector. Background The infrared lane detector is passive detection equipment for realizing vehicle detection through a pyroelectric infrared sensor (PASSIVE INFRARED RAY, PIR), and the infrared lane detector needs to have immunity to hot air flow, namely warm air resistance, and is required to operate in an environment with constant rising rate of ambient temperature, so that warm air resistance test is realized according to the operation data of the detected infrared lane detector. In the prior art, the warm air resistance test for the infrared lane detector is usually realized by using a heatable fan, but the temperature rising rate of the heatable fan in the prior art cannot be controlled, so that the problem of low reliability of test results is caused. Disclosure of utility model Aiming at the problems, the embodiment of the application provides a testing device for the warm air resistance test of an infrared lane detector, which is beneficial to solving the problem of low reliability of a testing result caused by uncontrollable heating rate in the prior art. The testing device comprises a first temperature measuring device, a box body and a controller, wherein the box body comprises a second temperature measuring device, a blowing device and a heating device, the first temperature measuring device, the second temperature measuring device, the blowing device and the heating device are respectively connected with the controller, the blowing device is used for generating air flow to guide the air in the box body into a testing space, the heating device is used for heating the air in the box body, the first temperature measuring device is used for measuring the ambient temperature in the testing space and sending the ambient temperature to the controller, the second temperature measuring device is used for measuring the air flow temperature of the air flow generated by the blowing device and sending the air flow temperature to the controller, the controller is used for receiving the ambient temperature and the air flow temperature and calculating the current temperature rising rate of the testing space according to the ambient temperature and the air flow temperature, and adjusting the heating power of the heating device according to the temperature rising rate to control the temperature rising rate of the testing space to be the target rate. It can be seen that by arranging the box body, two relatively closed box body inner spaces and test spaces are isolated in the warm air resistance test of the infrared detector, and a temperature detection device is respectively arranged in the box body inner spaces and the test spaces, so that the controller can control the heating power of the heating device according to the real-time temperature in the box body inner spaces and the test spaces, thereby maintaining the stable heating rate in the test spaces and improving the reliability of test results. In a possible embodiment, the testing device further comprises a wind speed measuring device, the air blowing device further comprises an adjustable fan, the wind speed measuring device and the adjustable fan are respectively connected with the controller, the wind speed measuring device is used for measuring the real-time wind speed of the air flow generated by the air blowing device and sending the real-time wind speed to the controller, and the controller is further used for receiving the real-time wind speed and controlling the adjustable fan according to the real-time wind speed to maintain the air flow generated by the air blowing device at the target wind speed. It can be seen that by configuring the wind speed measuring device and the adjustable fan, the controller can acquire the real-time wind speed of the currently generated warm air of the testing device based on the wind speed measuring device, so that the wind speed of the warm air can be controlled by the adjustable fan based on the real-time wind speed, the warm air can be kept to enter the testing space according to the stable fan, and the reliability of the testing result is further improved. In a possible embodiment the blowing device further comprises a ventilation tube mounted outside the housing for conducting the housing and the test space. In a possible embodiment the ventilation tube is a hose, the ventilation tube also being used for adjusting the direction and the height of the air flow generated by the blower device. It can be seen that by configuring the vent tube with a hose structure on the box, the direction and the height of the air flow generated by the blower device can be adjusted based on the test requirements, thereby improving the flexibility of the test device. In one possible e