Testing device for warm air resistance test of infrared lane detector

Abstract

The utility model provides a testing device for a warm air resistance test of an infrared lane detector, and the device comprises a first temperature measurement device, a box body, a controller, a second temperature measurement device, an air blowing device, and a heating device. Wherein the blast equipment is used for generating airflow to guide air in the box body into the test space; the heating equipment is used for heating air in the box body; the first temperature measuring equipment is used for measuring the environment temperature in the test space and sending the environment temperature to the controller; the second temperature measuring equipment is used for measuring the airflow temperature of the airflow generated by the air blowing equipment and sending the airflow temperature to the controller; the controller is used for receiving the environment temperature and the airflow temperature and calculating the current heating rate of the test space according to the environment temperature and the airflow 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. The test device can maintain a stable temperature rise rate and improve the reliability of a test result.

Description

Technical Field

[0001] This application relates to the field of infrared sensor testing technology, and in particular to a testing device for testing the resistance of infrared lane detectors to warm air. Background Technology

[0002] An infrared lane detector is a passive detection device that uses a pyroelectric infrared sensor (PIR) to detect vehicles. Infrared lane detectors need to be immune to hot airflow, i.e., they need to be able to withstand warm air. This requires the infrared lane detector to operate in an environment where the rate of temperature rise is constant. Thus, the test of the infrared lane detector's resistance to warm air is carried out based on the operating data of the infrared lane detector under test.

[0003] In existing technologies, the testing of infrared lane detectors' resistance to warm air is usually carried out using a heat-generating fan. However, the temperature rise rate of the heat-generating fan in existing technologies cannot be controlled, resulting in unreliable test results. Utility Model Content

[0004] To address the aforementioned issues, this application provides a testing device for testing the resistance of infrared lane detectors to warm air, which helps to solve the problem of uncontrollable heating rate in the prior art, resulting in low reliability of test results.

[0005] The testing apparatus includes a first temperature measuring device, a chamber, and a controller. The chamber includes a second temperature measuring device, a blower, and a heating device. The first temperature measuring device, the second temperature measuring device, the blower, and the heating device are each connected to the controller. Specifically: the blower generates airflow to guide air from inside the chamber into the test space; the heating device heats the air inside the chamber; the first temperature measuring device measures the ambient temperature in the test space and sends the ambient temperature to the controller; the second temperature measuring device measures the airflow temperature generated by the blower and sends the airflow temperature to the controller; the controller receives the ambient temperature and the airflow temperature, calculates the current heating rate of the test space based on the ambient temperature and the airflow temperature, and adjusts the heating power of the heating device according to the heating rate to control the heating rate of the test space to a target rate.

[0006] It can be seen that by setting up the enclosure, two relatively sealed internal spaces and a test space are isolated in the test of the infrared detector's resistance to warm air. A temperature detection device is set up in the enclosure and the test space respectively, so that the controller can control the heating power of the heating device according to the real-time temperature in the enclosure and the test space, thereby maintaining a stable heating rate in the test space and improving the reliability of the test results.

[0007] In one possible embodiment, the testing apparatus further includes a wind speed measuring device; the blower further includes an adjustable fan; the wind speed measuring device and the adjustable fan are respectively connected to a controller; the wind speed measuring device is used to measure the real-time wind speed of the airflow generated by the blower and send the real-time wind speed to the controller; the controller is also used to receive the real-time wind speed and control the adjustable fan according to the real-time wind speed to maintain the airflow generated by the blower at the target wind speed.

[0008] It can be seen that by configuring an anemometer and an adjustable fan, the controller can obtain the real-time wind speed of the warm air generated by the test device based on the anemometer. This allows the controller to adjust the adjustable fan based on the real-time wind speed to control the wind speed of the warm air, ensuring that the warm air enters the test space according to a stable fan flow, thus further improving the reliability of the test results.

[0009] In one possible embodiment, the blower also includes a ventilation duct; the ventilation duct is installed on the outside of the housing and serves to connect the housing and the test space.

[0010] In one possible embodiment, the ventilation duct is a flexible hose, which is also used to adjust the direction and height of the airflow generated by the blower.

[0011] It can be seen that by configuring a ventilation pipe with a flexible hose structure on the chamber, the direction and height of the airflow generated by the blower can be adjusted according to the test requirements, thereby improving the flexibility of the test device.

[0012] In one possible embodiment, the enclosure further includes a third temperature measuring device and a heat dissipation device; the third temperature measuring device and the heat dissipation device are respectively connected to the controller; wherein: the third temperature measuring device is used to measure the enclosure temperature and send the enclosure temperature to the controller; the controller is also used to acquire the enclosure temperature and determine whether the temperature inside the enclosure is too high based on the enclosure temperature; the heat dissipation device is used to dissipate heat from the enclosure when the temperature inside the enclosure is too high.

[0013] It can be seen that by configuring a third temperature measuring device and a heat dissipation device inside the enclosure, the controller can determine whether there is a risk of overheating in the enclosure based on the current enclosure temperature. In the event of excessively high temperature, the heat dissipation device can dissipate heat from the enclosure, thereby improving the safety of the infrared lane detector in the warm air resistance test.

[0014] In one possible embodiment, the heat dissipation device includes a cooling fan and an air temperature regulating device. The cooling fan is used to generate airflow to guide air from inside the housing into the heat dissipation space and to guide air from the heat dissipation space into the housing. The air temperature regulating device is used to cool the air in the heat dissipation space.

[0015] It can be seen that the cooling fan configured in the enclosure and the air temperature regulation device configured in the cooling space enable the rapid release of hot air inside the enclosure and the rapid cooling of the enclosure, thereby further improving the safety of the infrared lane detector in the warm air resistance test.

[0016] In one possible embodiment, the testing device further includes a heat insulation baffle, which is installed on the test surface of the housing, the test surface being the outer surface of the housing facing the test space.

[0017] It can be seen that by installing a heat insulation baffle on the test surface of the enclosure, the heat-generating equipment inside the enclosure and the infrared lane detector under test are isolated, reducing the impact of the heat-generating equipment on the infrared lane detector under test, thereby further improving the reliability of the test results. At the same time, only installing a heat insulation baffle on the test surface of the enclosure saves the manufacturing cost of the test device.

[0018] In one possible embodiment, the testing apparatus further includes a pressure measuring device connected to a controller; the pressure measuring device is used to acquire pressure data and send the pressure data to the controller; the controller is also used to receive the pressure data and adjust the heating device and / or the blower according to the pressure data to control the rate of increase of ambient temperature to a target rate.

[0019] It can be seen that by acquiring air pressure data in the environment through air pressure measurement equipment, the controller can calculate the current air density based on information such as air pressure and temperature. Ultimately, the controller can adjust the operating power of the heating equipment and / or the blower based on the air density, thereby controlling the rate of temperature rise in the environment to the target rate and improving the applicability of the testing device under different air pressure environments.

[0020] In one possible embodiment, the first temperature measuring device is a K-type thermocouple thermometer.

[0021] In one possible embodiment, the second and third temperature measuring devices are thermistor thermometers.

[0022] As can be seen from the above-described test device embodiments, by setting up a chamber and installing a temperature detection device inside the chamber and in the test space respectively, a stable heating rate is maintained in the test space, improving the reliability of the test results. The configuration of a wind speed measuring device and an adjustable fan maintains a stable wind speed, further improving the reliability of the test results. The configuration of a flexible ventilation duct improves the flexibility of the test device. The installation of a third temperature measuring device and a heat dissipation device inside the chamber improves the safety of the infrared lane detector's resistance to warm air testing. The configuration of a cooling fan in the chamber space and an air temperature regulating device in the heat dissipation space further improves the safety of the infrared lane detector's resistance to warm air testing. The installation of a heat insulation baffle on the test surface of the chamber further improves the reliability of the test results. The acquisition of environmental air pressure data through an air pressure measuring device improves the applicability of the test device under different air pressure environments. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a testing device provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the internal connection relationship of a testing device provided in an embodiment of this application;

[0026] Figure 3 A schematic diagram illustrating the connection between a housing and a test space provided in an embodiment of this application;

[0027] Figure 4 A schematic diagram of the heat dissipation state of the test device enclosure provided in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram showing the installation position of a heat insulation baffle provided in an embodiment of this application.

[0029] Reference numerals: 100: Test device; 101: First temperature measuring device; 102: Box; 103: Controller; 104: Second temperature measuring device; 105: Blower; 106: Heating device; 201: Ventilation pipe. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0031] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps is not limited to the steps listed, but may optionally include steps not listed, or may optionally include other steps inherent to these processes, methods, products, or apparatuses.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] Example 1:

[0034] Please see Figure 1 , Figure 1 This is a schematic diagram of a testing device provided in an embodiment of this application. The testing device 100 is used for testing the resistance of infrared lane detectors to warm air. The testing device 100 includes a first temperature measuring device 101, a housing 102, and a controller 103 (not shown in the figure). The housing 102 includes a second temperature measuring device 104, a blower 105, and a heating device 106.

[0035] Please see Figure 2 , Figure 2 This is a schematic diagram of the internal connection relationship of a testing device provided in an embodiment of this application. The first temperature measuring device 101, the second temperature measuring device 104, the blower 105, and the heating device 106 are respectively connected to the controller 103. That is, the controller 103 can control the first temperature measuring device 101, the second temperature measuring device 104, the blower 105, and the heating device 106, and acquire temperature data sent by the first temperature measuring device 101 and the second temperature measuring device 104.

[0036] Furthermore, the first temperature measuring device 101, the second temperature measuring device 104, the blower device 105, and the heating device 106 each include a wireless radio frequency module, and communicate with the controller based on the FSK protocol through the wireless radio frequency module.

[0037] The first temperature measuring device 101 is mainly used to measure the ambient temperature in the test space and send the ambient temperature to the controller 103 in real time or at a preset frequency. The test space is a closed or semi-closed independent space, which is isolated from the outside world by a baffle or wall made of heat insulation materials (such as fiberglass, asbestos, rock wool, heat insulation foam, etc.) and is used to place the infrared lane detector under test.

[0038] Optionally, the first temperature measuring device is a type K thermocouple thermometer. When measuring the temperature of dynamic airflow within the ventilation duct, the type K thermocouple, due to its exposed contact structure, can achieve a millisecond-level thermal response. In an airflow environment of 0.7 m / s, its temperature measurement hysteresis error is significantly better than other types of temperature detection devices. Simultaneously, the type K thermocouple, combined with the equipotential grounding design of the ventilation duct's metal wall, can effectively suppress electromagnetic interference, thereby improving the accuracy of ambient temperature readings.

[0039] The enclosure 102 here is a box-shaped structure supported by an insulated or non-insulated shell. There is another relatively independent space in the enclosure 102, in which a second temperature measuring device 104, a blower 105 and a heating device 106 are arranged.

[0040] The heating device 106 is specifically a resistive, electromagnetic induction, electric arc, or other type of heating source. The heating device 106 is used to heat the air in the chamber 102, thereby providing heated air for the warm air resistance test.

[0041] The blower 105 is specifically an axial flow, centrifugal or mixed flow type blower, used to generate airflow to introduce the heated air inside the housing 102 into the test space, thereby providing warm air to the infrared lane detector under test placed in the test space for warm air resistance testing.

[0042] The second temperature measuring device 104 is mainly used to measure the airflow temperature generated by the blower 105, that is, the temperature of the warm air blown out of the box, and to send the airflow temperature to the controller 103.

[0043] Furthermore, the second temperature measuring device is specifically a thermistor thermometer.

[0044] The controller 103 is specifically a central processing unit (CPU) or microcontroller unit (MCU) for receiving the ambient temperature sent by the first temperature measuring device 101 and the airflow temperature sent by the second temperature measuring device 104.

[0045] The current heating rate of the test space is calculated based on the ambient temperature and airflow temperature received simultaneously at the same time.

[0046] The heating power of the heating device 106 is adjusted according to the heating rate to control the heating rate of the test space to the target rate.

[0047] For example, if the target heating rate is 3°C / min, and the current heating rate is 2.5°C / min, the heating power of the heating device 106 is increased; if the current heating rate is 3.5°C / min, the heating power of the heating device 106 is decreased. This controls the heating rate of the test space to the target rate.

[0048] Furthermore, controlling the heating rate of the test space to the target rate specifically means controlling it within a certain rate range. For example, if the target rate is 3℃ / min, controlling the heating rate of the test space to the target rate specifically means controlling the heating rate of the test space between 2.8-3.2℃ / min.

[0049] It can be seen that by setting up the enclosure, two relatively sealed internal spaces and a test space are isolated in the test of the infrared detector's resistance to warm air. A temperature detection device is set up in the enclosure and the test space respectively, so that the controller can control the heating power of the heating device according to the real-time temperature in the enclosure and the test space, thereby maintaining a stable heating rate in the test space and improving the reliability of the test results.

[0050] Optionally, the testing device further includes a wind speed measuring device; the blower also includes an adjustable fan; the wind speed measuring device and the adjustable fan are respectively connected to the controller; the wind speed measuring device is used to measure the real-time wind speed of the airflow generated by the blower and send the real-time wind speed to the controller; the controller is also used to receive the real-time wind speed and control the adjustable fan according to the real-time wind speed to maintain the airflow generated by the blower at the target wind speed.

[0051] Specifically, in the embodiments of this application, the testing device also includes a wind speed measuring device, and the blower specifically includes an adjustable fan.

[0052] The wind speed measuring device and the adjustable fan are each connected to the controller. Both the wind speed measuring device and the adjustable fan also include wireless radio frequency modules, which communicate with the controller based on the FSK protocol.

[0053] The wind speed measuring device is installed at the air outlet of the enclosure or placed in the test space near the air outlet of the enclosure to detect the real-time wind speed of the airflow generated by the blower, so that the real-time wind speed can be sent to the controller in real time, or sent to the controller at preset time intervals (e.g., 10s).

[0054] The adjustable fan is specifically a fan with adjustable speed. This adjustable fan is located at the connection point between the chamber and the test space (e.g., an air outlet or duct), and its speed is dynamically controlled by a controller. This enables the blower to generate airflow to guide air from inside the chamber into the test space.

[0055] After receiving the real-time wind speed from the wind speed measuring device, the controller can adjust the speed of the adjustable fan by adjusting the power or current, thereby maintaining the airflow generated by the blower at the target wind speed.

[0056] For example, the control process is as follows: During the test initialization phase, the controller prioritizes completing the wind speed stabilization control before initiating the temperature regulation process; if the wind speed becomes abnormal due to ventilation duct deformation or ambient air pressure fluctuations during the test, the controller responds within 200 milliseconds and recalibrates the fan speed.

[0057] As can be seen, by configuring an anemometer and an adjustable fan, the controller can obtain the real-time wind speed of the warm air generated by the test device based on the anemometer, and thus adjust the adjustable fan to control the wind speed of the warm air based on the real-time wind speed, so as to keep the warm air flowing into the test space stably and further improve the reliability of the test results.

[0058] Optionally, the blower also includes a ventilation duct; the ventilation duct is installed on the outside of the enclosure and is used to connect the enclosure and the test space.

[0059] Specifically, in this embodiment, the blower also includes a ventilation duct, which is installed on the outside of the housing to connect the housing and the test space. The airflow generated by the blower is introduced into the test space through the ventilation duct, thereby realizing the warm air resistance test of the infrared lane detector under test placed in the test space.

[0060] Please see Figure 3 , Figure 3 A schematic diagram of the connection between the housing and the test space provided in this application embodiment shows that, as Figure 3As shown, the housing 102 is connected to the test space through the ventilation pipe 201, so that the airflow generated by the blower is introduced into the test space through the ventilation pipe.

[0061] Optionally, the ventilation duct is a flexible hose, which is also used to adjust the direction and height of the airflow generated by the blower.

[0062] It can be seen that by configuring a ventilation pipe with a flexible hose structure on the chamber, the direction and height of the airflow generated by the blower can be adjusted according to the test requirements, thereby improving the flexibility of the test device.

[0063] Example 2:

[0064] The above embodiments provide a test device for testing the resistance of infrared lane detectors to warm air, which has an internal space of the enclosure and a test space. Based on this, and taking into account the heat dissipation of the enclosure, the embodiments of this application also provide a more detailed test device.

[0065] The test apparatus also includes a third temperature measuring device and a heat dissipation device, both of which are connected to the controller. The third temperature measuring device and the heat dissipation device also each include a wireless radio frequency module, which communicates with the controller based on the FSK protocol.

[0066] The third temperature measuring device is used to measure the temperature of the enclosure and send the enclosure temperature to the controller.

[0067] Furthermore, the third temperature measuring device is a thermistor thermometer.

[0068] Heat dissipation equipment, specifically a semiconductor cooling device or a cooling fan, etc.

[0069] The controller is also used to acquire the cabinet temperature and determine whether the temperature inside the cabinet is too high; the heat dissipation device is used to dissipate heat from the cabinet when the temperature inside the cabinet is too high.

[0070] It should be noted that when the third temperature measuring device collects the internal temperature of the enclosure in real time and transmits it to the controller, the controller will determine whether the enclosure is overheating based on a preset temperature threshold. If the enclosure temperature exceeds the threshold for 3 consecutive seconds, the cooling equipment will be activated to implement a gradient cooling strategy. Specifically, this includes activating a low-speed cooling mode (cooling equipment power 40%) while monitoring the temperature change rate; when the temperature drop rate is <0.5℃ / min, it will automatically switch to a high-speed mode (cooling equipment power 100%) until the enclosure temperature drops back to a safe range.

[0071] In addition, the testing device also includes a first temperature measuring device, a housing, a controller, a second temperature measuring device, a blower, and a heating device. For detailed descriptions of these components, please refer to the relevant descriptions in the above-mentioned application embodiments, which will not be repeated here.

[0072] It can be seen that by configuring a third temperature measuring device and a heat dissipation device inside the enclosure, the controller can determine whether there is a risk of overheating in the enclosure based on the current enclosure temperature. In the event of excessively high temperature, the heat dissipation device can dissipate heat from the enclosure, thereby improving the safety of the infrared lane detector in the warm air resistance test.

[0073] Optionally, the heat dissipation equipment includes a cooling fan and an air temperature regulating device. The cooling fan is used to generate airflow to guide air from inside the enclosure into the heat dissipation space and vice versa. The air temperature regulating device is used to cool the air in the heat dissipation space.

[0074] For details, please see Figure 4 , Figure 4 This is a schematic diagram of the heat dissipation state of a test device provided in an embodiment of this application. It can be seen that when the internal temperature of the chamber becomes too high, the cooling fan starts, generating airflow to guide air from inside the chamber into the heat dissipation space, and then guides air from the heat dissipation space back into the chamber. Figure 4 The structure shown is achieved through two cooling fans. When the cooling fans are started, a two-way airflow path is created. The first airflow introduces the high-temperature air inside the box into the heat dissipation space, and the second airflow returns the low-temperature air, which has been cooled by the air temperature regulation device, to the box.

[0075] In addition, the heat dissipation space here is also a space independent of the internal space of the chamber and the testing space. The air temperature regulation equipment uses hardware such as compressor semiconductors to cool the air in the heat dissipation space, thereby quickly reducing the air inside the chamber.

[0076] It can be seen that the heat dissipation air configured in the lower chamber space and the air temperature regulation device configured in the heat dissipation space realize the rapid release of hot air in the chamber and the rapid cooling of the chamber, thereby further improving the safety of the infrared lane detector's resistance to warm air testing.

[0077] Optionally, the testing device also includes a heat insulation baffle, which is installed on the test surface of the chamber, the test surface being the outer surface of the chamber facing the test space.

[0078] Specifically, please see Figure 5 , Figure 5This is a schematic diagram of the installation position of a heat insulation baffle provided in an embodiment of this application. The heat insulation baffle is installed on the test surface of the box body. The test surface is the outer surface of the box body facing the test space. The other surfaces are non-test surfaces. The heat insulation baffle is made of heat insulation materials (such as glass fiber, asbestos, rock wool, heat insulation foam, etc.).

[0079] As shown in the figure, without the installation of a heat insulation baffle, the heat generated by the heating device will produce heat inside the chamber, which may cause the infrared lane detector under test to detect the infrared radiation generated by the heating device, thus affecting the test results of the infrared lane detector under test.

[0080] By installing a heat insulation baffle on the test surface of the enclosure, the heat-generating equipment inside the enclosure and the infrared lane detector under test are isolated, and the infrared lane detector under test cannot detect the infrared radiation generated by the heat-generating equipment.

[0081] Furthermore, each side of the enclosure can be fitted with heat insulation baffles, or the exterior of the enclosure can be made of heat insulation material to effectively isolate the heat-generating equipment inside the enclosure from the infrared lane detector being tested.

[0082] It can be seen that by installing a heat insulation baffle on the test surface of the enclosure, the heat-generating equipment inside the enclosure and the infrared lane detector under test are isolated, reducing the impact of the heat-generating equipment on the infrared lane detector under test, thereby further improving the reliability of the test results. At the same time, only installing a heat insulation baffle on the test surface of the enclosure saves the manufacturing cost of the test device.

[0083] Example 3:

[0084] The above embodiments provide a test device for testing the resistance of infrared lane detectors to warm wind by using temperature measuring equipment and wind speed measuring equipment to achieve stable heating rate and stable wind speed. Based on this, considering the influence of air pressure on heating rate and wind speed, the embodiments of this application also provide a more detailed test device.

[0085] In this embodiment of the application, the testing device further includes a pressure measuring device, which is connected to the controller. The pressure measuring device specifically includes a wireless radio frequency module and communicates with the controller based on the FSK protocol through the wireless radio frequency module.

[0086] The barometric pressure measuring device is used to acquire the barometric pressure data of the current environment and send the barometric pressure data to the controller; the controller is also used to receive the barometric pressure data and adjust the heating device and / or the blower according to the barometric pressure data to control the rate of increase of ambient temperature to the target rate.

[0087] It should be noted that, under constant heating power, the rate of air heating depends on the heat capacity of a unit volume of gas. According to the ideal gas law, a decrease in air pressure leads to a decrease in air density, resulting in a reduction in the mass of the same volume of air. For example, at an altitude of 3000m, the air density is only 70% of that at sea level, causing a 30% decrease in heat capacity. At this time, if the original heating power is maintained, the measured heating rate will decrease from 3℃ / min to approximately 2.1℃ / min.

[0088] The wind speed sensor in the blower also operates on the principle of dynamic pressure difference. When air density decreases, the volume of air corresponding to the same wind speed decreases. If the pressure change is not compensated for, the control system may misjudge that the wind speed meets the standard and reduce the fan speed, further exacerbating the insufficient heat transfer. For example, in a standard environment, a wind speed of 0.7 m / s corresponds to a dynamic pressure difference of 0.3 Pa. At an air pressure of 70 kPa, the wind speed needs to be increased to 0.84 m / s to generate the same dynamic pressure signal.

[0089] Therefore, in this embodiment of the application, the air pressure data of the current environment is obtained by the air pressure measuring device and sent to the controller, so that the controller can generate compensation for the heating power of the heating device and the operating power of the blower based on the current air pressure data.

[0090] It can be seen that by acquiring air pressure data in the environment through air pressure measurement equipment, the controller can calculate the current air density based on information such as air pressure and temperature. Ultimately, the controller can adjust the operating power of the heating equipment and / or the blower based on the air density, thereby controlling the rate of temperature rise in the environment to the target rate and improving the applicability of the testing device under different air pressure environments.

[0091] As can be seen from the above-described test device embodiments, by setting up a chamber and installing a temperature detection device inside the chamber and in the test space respectively, a stable heating rate is maintained in the test space, improving the reliability of the test results. The configuration of a wind speed measuring device and an adjustable fan maintains a stable wind speed, further improving the reliability of the test results. The configuration of a flexible ventilation duct improves the flexibility of the test device. The installation of a third temperature measuring device and a heat dissipation device inside the chamber improves the safety of the infrared lane detector's resistance to warm air testing. The configuration of a cooling fan in the chamber space and an air temperature regulating device in the heat dissipation space further improves the safety of the infrared lane detector's resistance to warm air testing. The installation of a heat insulation baffle on the test surface of the chamber further improves the reliability of the test results. The acquisition of environmental air pressure data through an air pressure measuring device improves the applicability of the test device under different air pressure environments.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0095] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A testing device for testing the resistance of infrared lane detectors to warm air, characterized in that, The testing device includes a first temperature measuring device, a housing, and a controller; the housing includes a second temperature measuring device, a blower, and a heating device; the first temperature measuring device, the second temperature measuring device, the blower, and the heating device are respectively connected to the controller; wherein: The blower is used to generate airflow to guide the air inside the chamber into the test space; The heating device is used to heat the air in the box; The first temperature measuring device is used to measure the ambient temperature in the test space and send the ambient temperature to the controller; The second temperature measuring device is used to measure the airflow temperature generated by the blower and send the airflow temperature to the controller; The controller is configured to receive the ambient temperature and the airflow temperature, and calculate the current heating rate of the test space based on the ambient temperature and the airflow temperature. The heating power of the heating device is adjusted according to the heating rate to control the heating rate of the test space to the target rate.

2. The testing apparatus according to claim 1, characterized in that, The testing device further includes a wind speed measuring device; the blower further includes an adjustable fan; the wind speed measuring device and the adjustable fan are respectively connected to the controller; The wind speed measuring device is used to measure the real-time wind speed of the airflow generated by the blower and send the real-time wind speed to the controller. The controller is also configured to receive the real-time wind speed and control the adjustable fan to maintain the airflow generated by the blower at the target wind speed based on the real-time wind speed.

3. The testing apparatus according to claim 2, characterized in that, The blower also includes a ventilation pipe; the ventilation pipe is installed on the outside of the housing and is used to connect the housing and the test space.

4. The testing apparatus according to claim 3, characterized in that, The ventilation duct is a flexible hose, and it is also used to adjust the direction and height of the airflow generated by the blower.

5. The testing apparatus according to claim 1, characterized in that, The enclosure further includes a third temperature measuring device and a heat dissipation device; the third temperature measuring device and the heat dissipation device are respectively connected to the controller; wherein: The third temperature measuring device is used to measure the temperature of the enclosure and send the temperature of the enclosure to the controller; The controller is also used to acquire the temperature of the enclosure and determine whether the temperature inside the enclosure is too high based on the temperature of the enclosure. The heat dissipation device is used to dissipate heat from the enclosure when the temperature inside the enclosure is too high.

6. The testing apparatus according to claim 5, characterized in that... The heat dissipation device includes a cooling fan and an air temperature regulating device. The cooling fan is used to generate airflow to guide air from the box into the heat dissipation space and to guide air from the heat dissipation space into the box. The air temperature regulating device is used to cool the air in the heat dissipation space.

7. The testing apparatus according to any one of claims 1-6, characterized in that, The testing device also includes a heat insulation baffle, which is installed on the test surface of the housing, and the test surface is the outer surface of the housing facing the test space.

8. The testing apparatus according to any one of claims 1-6, characterized in that, The testing device also includes a pressure measuring device, which is connected to the controller. The air pressure measuring device is used to acquire air pressure data and send the air pressure data to the controller; The controller is also configured to receive the air pressure data and adjust the heating device and / or the blower according to the air pressure data to control the rate of increase of the ambient temperature to the target rate.

9. The testing apparatus according to any one of claims 1-6, characterized in that, The first temperature measuring device is a K-type thermocouple thermometer.

10. The testing apparatus according to claim 5 or 6, characterized in that, The second and third temperature measuring devices are thermistor thermometers.

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