Vehicle-mounted ultrasonic radar detection response time test system

Abstract

The embodiment of the utility model provides a vehicle-mounted ultrasonic radar detection response time test system, comprising a test site which comprises an equipment placing area used for placing a vehicle-mounted ultrasonic radar to be tested and a detection area used for wave sending detection of the vehicle-mounted ultrasonic radar; the standard obstacle is arranged at a preset position in the detection area; the time monitor is connected with the vehicle-mounted ultrasonic radar; a power supply circuit of the power supply module is internally provided with a switch element for controlling the on-off of the power supply circuit; the time monitor enters a monitoring state when the switch element is switched from disconnection to connection to obtain an electric signal provided by the power supply module, and records the moment of entering the monitoring state as the moment of arrival of an obstacle; and recording a first detection signal which is sent by the vehicle-mounted ultrasonic radar and is used for detecting the standard obstacle after entering the monitoring state as an obstacle detection moment. The embodiment is low in test cost and high in test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted radar testing technology, and in particular to a vehicle-mounted radar detection response time testing system. Background Technology

[0002] Vehicles are typically equipped with onboard ultrasonic radar to detect obstacles in the near-field area of ​​the vehicle. Since onboard ultrasonic radar detects obstacles by first emitting waves and then receiving the echoes, there is a time difference between when an obstacle appears within the detection range of the onboard ultrasonic radar (i.e., the time the obstacle arrives) and when the onboard ultrasonic radar detects the obstacle (i.e., the time the obstacle is measured). This time difference is the detection response time of the onboard ultrasonic radar. Before the onboard ultrasonic radar leaves the factory, its detection response time needs to be tested to ensure that the detection response time of the onboard ultrasonic radar meets the corresponding standards.

[0003] Existing methods for testing the response time of vehicle-mounted ultrasonic radar detection mainly include: high-speed camera observation based on high-speed cameras and vehicle-mounted truth system monitoring based on vehicle-mounted lidar systems. However, both of these methods have high requirements for the testing environment, require the construction of complex test benches, and result in high equipment costs and low testing efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a vehicle-mounted ultrasonic radar detection response time testing system that can test the detection response time of vehicle-mounted ultrasonic radar at low cost and high efficiency.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a vehicle-mounted ultrasonic radar detection response time testing system, comprising:

[0006] The test site includes an equipment placement area for placing the vehicle-mounted ultrasonic radar to be tested and a detection area for the vehicle-mounted ultrasonic radar to emit waves for detection.

[0007] Standard obstacles are set at predetermined locations within the detection area;

[0008] A time monitor connected to the vehicle-mounted ultrasonic radar; and

[0009] A power supply module that provides electrical signals to the time monitor, wherein the power supply line is provided with a switching element that controls the on / off state of the power supply line;

[0010] The time monitor enters a monitoring state when the switching element switches from open to closed and receives the electrical signal provided by the power module, and records the moment of entering the monitoring state as the time of obstacle arrival, and records the first detection signal of the standard obstacle received by the vehicle-mounted ultrasonic radar after entering the monitoring state as the time of obstacle detection.

[0011] Furthermore, the switching element is disposed at a predetermined location within the detection area where the standard obstacle is set, and is controlled to open or close by the standard obstacle.

[0012] Furthermore, the power module provides the electrical signal to the time monitor through two parallel power supply lines, and each power supply line is equipped with a switching element. The positions of the switching elements in the two power supply lines within the detection area correspond to the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar.

[0013] Furthermore, the equipment placement area is provided with multiple mounting brackets that correspond one-to-one with the locations where each vehicle-mounted ultrasonic radar is installed on the motor vehicle, and the time monitor is connected to each vehicle-mounted ultrasonic radar to determine the time of obstacle detection based on the first detection signal sent by each vehicle-mounted ultrasonic radar after comprehensive calculation when it detects the standard obstacle.

[0014] Furthermore, the time monitor is an oscilloscope.

[0015] Furthermore, the equipment placement area is also provided with a platform, and the mounting base is correspondingly located on the top surface of the platform, so that the vehicle-mounted ultrasonic radar mounted on the mounting base is higher than the obstacle setting plane of the detection area.

[0016] Furthermore, the test site is a flat surface, and the equipment placement area is located at one end of the test site.

[0017] After adopting the above technical solution, the present invention has at least the following beneficial effects: The present invention sets up a test site, places the vehicle-mounted ultrasonic radar to be tested in the equipment placement area of ​​the test site and connects it to a time monitor, then controls the vehicle-mounted ultrasonic radar to emit waves toward the detection area of ​​the test site to detect obstacles, and then moves a standard obstacle to a predetermined position in the detection area. At the same time, the switching element is closed so that the time monitor receives an electrical signal from the power module through the power supply line and enters the monitoring state. The time monitor can record the time of entering the monitoring state as the time of obstacle arrival. Meanwhile, the vehicle-mounted ultrasonic radar continuously emits waves to detect obstacles in the detection area. When it detects the standard obstacle, it will generate a corresponding detection signal and send it out. The time monitor does not receive detection signals or does not process them when it is not in the monitoring state. After entering the monitoring state, it records the first detection signal received from the vehicle-mounted ultrasonic radar as the time of obstacle detection. Finally, by combining the time of obstacle detection and the time of obstacle arrival, the detection response time of the vehicle-mounted ultrasonic radar can be calculated quickly and accurately. The entire test system has a simple structure, low cost, and high testing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an optional embodiment of the vehicle-mounted ultrasonic radar detection response time testing system of this utility model.

[0019] Figure 2 The flowchart illustrates the steps of testing the detection response time of a vehicle-mounted ultrasonic radar using the vehicle-mounted ultrasonic radar detection response time testing system of this invention. Detailed Implementation

[0020] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0021] like Figure 1 As shown, an optional embodiment of this utility model provides a vehicle-mounted ultrasonic radar detection response time testing system, comprising:

[0022] Test site 1, the equipment placement area 10 for placing the vehicle-mounted ultrasonic radar A to be tested, and the detection area 12 for the vehicle-mounted ultrasonic radar 10 to emit waves for detection.

[0023] Standard obstacles 3 are set at predetermined positions within the detection area 12;

[0024] Time monitor 5 connected to the vehicle-mounted ultrasonic radar A; and

[0025] A power supply module 7 provides electrical signals to the time monitor 5, and a switching element 72 is provided in the power supply line 70 to control the on and off of the power supply line 70;

[0026] The time monitor 5 enters the monitoring state when the switching element 72 switches from open to closed and receives the electrical signal provided by the power module 7, and records the moment of entering the monitoring state as the time of obstacle arrival, and records the first detection signal of the standard obstacle received by the vehicle-mounted ultrasonic radar A after entering the monitoring state as the time of obstacle detection.

[0027] This embodiment of the invention involves setting up a test site 1, placing the vehicle-mounted ultrasonic radar A to be tested in the equipment placement area 10 of the test site 1, and connecting it to a time monitor 5. The vehicle-mounted ultrasonic radar A is then controlled to emit waves towards the detection area 12 of the test site 1 to detect obstacles. A standard obstacle 3 is then moved to a predetermined position in the detection area 12. Simultaneously, the switch element 72 is closed, causing the time monitor 5 to receive an electrical signal from the power module 7 via the power supply line 70 and enter monitoring mode. The time monitor 5 records the moment it enters monitoring mode as the time of obstacle arrival. At the same time, the vehicle-mounted ultrasonic radar... The ultrasonic radar A continuously emits waves to detect obstacles within the detection area 12. When it detects the standard obstacle 3, it generates a corresponding detection signal and sends it out. The time monitor 5 does not receive detection signals or does not process them when it is not in the monitoring state. However, after entering the monitoring state, it records the first detection signal received from the vehicle-mounted ultrasonic radar A as the time when the obstacle is detected. Finally, by combining the time when the obstacle is detected and the time when the obstacle arrives, the detection response time of the vehicle-mounted ultrasonic radar A can be calculated quickly and accurately. The entire test system has a simple structure, low cost, and high testing efficiency.

[0028] In one optional embodiment of this utility model, such as Figure 1 As shown, the switching element 72 is positioned within the detection area 12 at a predetermined location where the standard obstacle 3 is set, and is controlled to open or close by the standard obstacle 3. In this embodiment, the switching element 72 is positioned at a predetermined location within the detection area 12. When the standard obstacle 3 moves to the predetermined location within the detection area 10, the standard obstacle 3 directly presses and controls the switching element 72 to close, reducing errors. Of course, it is understandable that placing the switching element 72 next to the time monitor 5 so that the tester can manually operate it to open or close can also achieve control of the power supply line 70.

[0029] In one optional embodiment of this utility model, such as Figure 1As shown, the power module 7 selectively provides an electrical signal to the time monitor 5 through two parallel power supply lines 70. Each power supply line has a switching element 72. The switching elements 72 in the two power supply lines are positioned at the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A within the detection area 12. In this embodiment, by setting two power supply lines 70 to selectively provide an electrical signal to the time monitor 5, and each power supply line 70 is equipped with a corresponding switching element 72, the switching elements 72 of the two power supply lines are respectively positioned at the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A to be tested within the detection area 12. By testing the detection response time at the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A, the detection response time of the vehicle-mounted ultrasonic radar A can be more accurately determined to be qualified.

[0030] In one optional embodiment of this utility model, such as Figure 1 As shown, the equipment placement area 10 is equipped with multiple mounting bases 101 corresponding one-to-one with the positions of each vehicle-mounted ultrasonic radar A installed on the motor vehicle. The time monitor 5 is connected to each vehicle-mounted ultrasonic radar A to determine the time of obstacle detection based on the first detection signal sent by each vehicle-mounted ultrasonic radar A after comprehensive calculation when it detects the standard obstacle 3. In this embodiment, multiple vehicle-mounted ultrasonic radars A of the vehicle radar system can be placed one-to-one in the multiple mounting bases 101 in the equipment placement area 10 for simultaneous testing. When each vehicle-mounted ultrasonic radar A of the vehicle radar system detects the standard obstacle 3, it will automatically perform comprehensive calculation and output a comprehensive detection signal. The time monitor 5 records the time of receiving the comprehensive detection signal as the time of obstacle detection, thereby realizing the comprehensive testing of multiple vehicle-mounted ultrasonic radars A of a vehicle radar system.

[0031] In one optional embodiment of this utility model, such as Figure 1 As shown, the time monitor 5 is an oscilloscope. This embodiment uses a common oscilloscope as the time monitor 5, which can monitor the obstacle location information and time emitted by the vehicle-mounted ultrasonic radar, as well as the closed-loop switch electrical signal information and time, thereby outputting the obstacle arrival time and obstacle measurement time. In specific implementation, the oscilloscope and the vehicle-mounted ultrasonic radar A are powered on and started simultaneously. The oscilloscope enters the monitoring state upon receiving voltage / current signals from the power module 5.

[0032] In one optional embodiment of this utility model, such as Figure 1As shown, the equipment placement area 10 is also provided with a platform 8, and the mounting base 101 is correspondingly provided on the top surface of the platform 8, so that the vehicle-mounted ultrasonic radar A mounted on the mounting base 101 is higher than the obstacle placement plane of the detection area 12. In this embodiment, the platform 8 is set to simulate the installation height of the vehicle-mounted ultrasonic radar A on a motor vehicle, so that the height difference between the vehicle-mounted ultrasonic radar A mounted on the platform 8 and the detection area 12 is consistent with the height difference between the vehicle-mounted ultrasonic radar A on the motor vehicle and the ground, thus better simulating the actual application environment of the vehicle-mounted ultrasonic radar A. In a specific embodiment, the standard obstacle 3 is manufactured according to relevant national or industry standards, usually a PVC pipe with a diameter of 75mm × 1000mm, which is simple to obtain and has a low cost.

[0033] In one optional embodiment of this utility model, such as Figure 1 As shown, the test site 1 is a flat ground, and the equipment placement area 10 is located at one end of the test site 1. In this embodiment, the flat ground is directly used as the test site 1, which facilitates testing, and the equipment placement area 10 is located at one end of the test site, which helps to reduce the footprint of the test site 1.

[0034] like Figure 2 As shown, the test method for the vehicle-mounted ultrasonic radar A detection response time test system provided in any of the above embodiments of this utility model includes the following steps:

[0035] S1: Place the vehicle-mounted ultrasonic radar A to be tested in the equipment placement area 10 of the test site, and control the vehicle-mounted ultrasonic radar A to emit waves toward the detection area 12 for detection.

[0036] S2: Place the standard obstacle 3 at a predetermined position within the detection area 12, and close the switching element 72 of the power module to provide an electrical signal to the time monitor 5;

[0037] S3: The time monitor 5 records the arrival time of the obstacle and the measured time of the obstacle; and

[0038] S4: Calculate the detection response time of the vehicle-mounted ultrasonic radar A based on the arrival time and measurement time of the obstacle.

[0039] By placing the vehicle-mounted ultrasonic radar A to be tested in the equipment placement area 10 of the test site 1 and connecting it to the time monitor 5, the vehicle-mounted ultrasonic radar A is controlled to emit waves towards the detection area 12 of the test site 1 to detect obstacles. Then, a standard obstacle 3 is moved to a predetermined position in the detection area 12, and at the same time, the switch element 72 is closed, so that the time monitor 5 receives an electrical signal provided by the power module 7 through the power supply line 70 and enters the monitoring state. The time monitor 5 can then record the moment of entering the monitoring state as the time of obstacle arrival. Meanwhile, the vehicle-mounted ultrasonic radar A is always in constant motion. The system intermittently emits waves to detect obstacles within the detection zone 12. When it detects the standard obstacle 3, it generates a corresponding detection signal and sends it out. The time monitor 5 does not receive detection signals or does not process them when it is not in the monitoring state. However, when it enters the monitoring state, it records the first detection signal received from the vehicle-mounted ultrasonic radar A as the time when the obstacle is detected. Finally, by combining the time when the obstacle is detected and the time when the obstacle arrives, the detection response time of the vehicle-mounted ultrasonic radar A can be calculated quickly and accurately. The entire test system has a simple structure, low cost, and high testing efficiency.

[0040] In an optional embodiment of this invention, the standard obstacle 3 is moved sequentially to two extreme positions within the standard test distance range of the vehicle-mounted ultrasonic radar A within the detection area 12. The power module 7 provides electrical signals to the time monitor 5 via corresponding closed switching elements 72, thereby obtaining the arrival time and measurement time of the obstacle at each of the two extreme positions and calculating the detection response time corresponding to the two extreme positions. In this embodiment, by moving the standard obstacle to the two extreme positions within the standard test distance range of the vehicle-mounted ultrasonic radar A, and by providing electrical signals to the time monitor 5 via corresponding closed switching elements 72, the detection response time at the two extreme positions within the standard test distance range of the vehicle-mounted ultrasonic radar A can be tested and obtained separately. This allows for a more accurate determination of whether the detection response time of the vehicle-mounted ultrasonic radar A is qualified.

[0041] In one optional embodiment of this invention, the tolerance of the detection response time of the vehicle-mounted ultrasonic radar A is calculated based on the detection response times at two extreme positions. In this embodiment, the tolerance of the detection response time of the vehicle-mounted ultrasonic radar A is also calculated based on the detection response times at the two extreme positions, facilitating subsequent application of the detection response time of the vehicle-mounted ultrasonic radar A.

[0042] In specific implementation, the detection response time of the vehicle-mounted ultrasonic radar A is R=Tt, where T is the arrival time of the obstacle and t is the detection time of the obstacle; the standard test distance range is usually [100cm, 150cm], therefore, the distances corresponding to points P and Q at the two extreme positions are 100cm and 150cm respectively, and the corresponding R... P =T P -t P R Q =T Q -t Q Therefore, the tolerance of the detection response time of the vehicle-mounted ultrasonic radar A is M=R. P -R Q .

[0043] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A vehicle-mounted ultrasonic radar detection response time testing system, characterized in that, The system includes: The test site includes an equipment placement area for placing the vehicle-mounted ultrasonic radar to be tested and a detection area for the vehicle-mounted ultrasonic radar to emit waves for detection. Standard obstacles are set at predetermined locations within the detection area; A time monitor connected to the vehicle-mounted ultrasonic radar; and A power module that provides electrical signals to the time monitor through a power supply line, wherein the power supply line is provided with a switching element that controls the on and off of the power supply line; The time monitor enters a monitoring state when the switching element switches from open to closed and receives the electrical signal provided by the power module, and records the moment of entering the monitoring state as the time of obstacle arrival, and records the first detection signal of the standard obstacle received by the vehicle-mounted ultrasonic radar after entering the monitoring state as the time of obstacle detection.

2. The vehicle-mounted ultrasonic radar detection response time testing system as described in claim 1, characterized in that, The switching element is located at a predetermined position of the standard obstacle within the detection area and is controlled to open or close by the standard obstacle.

3. The vehicle-mounted ultrasonic radar detection response time testing system as described in claim 2, characterized in that, The power module provides the electrical signal to the time monitor through two parallel power supply lines. Each power supply line has a switching element. The positions of the switching elements in the two power supply lines within the detection area correspond to the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar.

4. The vehicle-mounted ultrasonic radar detection response time testing system as described in claim 3, characterized in that, The equipment placement area is equipped with multiple mounting brackets that correspond one-to-one with the locations where each vehicle-mounted ultrasonic radar is installed. The time monitor is connected to each vehicle-mounted ultrasonic radar to determine the time of obstacle detection based on the first detection signal sent by each vehicle-mounted ultrasonic radar after comprehensive calculation when it detects the standard obstacle.

5. The vehicle-mounted ultrasonic radar detection response time testing system as described in claim 1 or 4, characterized in that, The time monitor is an oscilloscope.

6. The vehicle-mounted ultrasonic radar detection response time testing system as described in claim 4, characterized in that, The equipment placement area is also provided with a platform, and the mounting base is correspondingly located on the top surface of the platform so that the vehicle-mounted ultrasonic radar mounted on the mounting base is higher than the obstacle setting plane of the detection area.

7. The vehicle-mounted ultrasonic radar detection response time testing system as described in claim 1 or 6, characterized in that, The test site is a flat ground, and the equipment placement area is located at one end of the test site.

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