Vehicle-mounted ultrasonic radar detection response time test system and method

Abstract

The embodiment of the present invention provides a vehicle-mounted ultrasonic radar detection response time test system and method, the system includes: a test site, including an equipment placement area for placing a vehicle-mounted ultrasonic radar to be tested and a detection area for the vehicle-mounted ultrasonic radar to send waves for detection; a standard obstacle set at a predetermined position in the detection area; a time monitor connected to the vehicle-mounted ultrasonic radar; and a power module that provides an electrical signal to the time monitor, and a switch element that controls the on-off of the power supply line is set in the power supply circuit of the power module; the time monitor enters a monitoring state when the switch element switches from open to closed and obtains the electrical signal provided by the power module, and the time monitor enters the monitoring state and records the time of entering the monitoring state as the obstacle arrival time, and records the first detection signal of the vehicle-mounted ultrasonic radar that detects the standard obstacle after entering the monitoring state as the obstacle measurement time. This embodiment has low testing cost and high testing efficiency.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of vehicle-mounted radar testing, and in particular to a vehicle-mounted radar detection response time testing system and method. Background Art

[0002] Vehicle-mounted ultrasonic radars are usually installed on motor vehicles to detect obstacles in the near-field area of ​​the motor vehicle. Since the vehicle-mounted ultrasonic radar detects obstacles by first sending waves and then receiving echoes, there will be a time difference from the obstacle appearing in the detection range of the vehicle-mounted ultrasonic radar (i.e. the obstacle arrival time) to the vehicle-mounted ultrasonic radar detecting the obstacle (i.e. the obstacle measurement time). This time difference is the detection response time of the vehicle-mounted ultrasonic radar. Before the vehicle-mounted ultrasonic radar leaves the factory, its detection response time needs to be tested to ensure that the detection response time of the factory-mounted ultrasonic radar meets the corresponding standards.

[0003] The existing vehicle-mounted ultrasonic radar detection response time test methods mainly include: high-speed camera observation method based on high-speed camera and vehicle-mounted true value system monitoring based on vehicle-mounted laser radar system. However, the above two test methods have high requirements on the test environment and need to build a complex test bench. The equipment cost required for the test is also high and the test efficiency is low. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a vehicle-mounted ultrasonic radar detection response time testing system, which can test the detection response time of the vehicle-mounted ultrasonic radar at low cost and high efficiency.

[0005] A further technical problem to be solved by an embodiment of the present invention is to provide a method for testing the detection response time of a vehicle-mounted ultrasonic radar, which can test the detection response time of a vehicle-mounted ultrasonic radar at low cost and high efficiency.

[0006] In order to solve the above technical problems, the embodiment of the present invention provides the following technical solutions: a vehicle-mounted ultrasonic radar detection response time test system, comprising: 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; A standard obstacle disposed at a predetermined position within the detection area; a time monitor connected to the vehicle-mounted ultrasonic radar; and A power supply module for providing an electrical signal to the time monitor, wherein a switch element for controlling the on / off of the power supply circuit is provided in the power supply circuit; The time monitor enters the monitoring state when the switch element switches from open to closed and obtains the electrical signal provided by the power module, and records the time of entering the monitoring state as the obstacle arrival time, and records the first detection signal of the standard obstacle received from the vehicle-mounted ultrasonic radar after entering the monitoring state as the obstacle measurement time.

[0007] Furthermore, the switch element is arranged at a position where the standard obstacle is predetermined to be arranged in the detection area and is controlled to be opened or closed by the standard obstacle.

[0008] Furthermore, the power supply module selectively provides the electrical signal to the time monitor through two parallel power supply lines, each of the power supply lines is provided with a switching element, and the setting positions of the switching elements in the two power supply lines in the detection area respectively correspond to the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar.

[0009] Furthermore, the equipment placement area is provided with a plurality of mounting sockets corresponding to the positions of each vehicle-mounted ultrasonic radar installed in the motor vehicle and used to place each of the vehicle-mounted ultrasonic radars. The time monitor is connected to each of the vehicle-mounted ultrasonic radars to determine the time when the obstacle is measured based on the first detection signal sent by each vehicle-mounted ultrasonic radar after comprehensive calculation when detecting the standard obstacle.

[0010] Furthermore, the time monitor is an oscilloscope.

[0011] Furthermore, the equipment installation area is also provided with a carrier, and the mounting seat is correspondingly arranged on the top surface of the carrier so that the vehicle-mounted ultrasonic radar installed on the mounting seat is higher than the obstacle setting plane of the detection area.

[0012] Furthermore, the test site is a flat ground, and the equipment placement area is located at one end of the test site.

[0013] On the other hand, in order to solve the above further technical problems, an embodiment of the present invention provides the following technical solutions: a test method of a vehicle-mounted ultrasonic radar detection response time test system based on any one of the above, comprising the following steps: The vehicle-mounted ultrasonic radar to be tested is placed in the equipment placement area of ​​the test site, and the vehicle-mounted ultrasonic radar is controlled to emit waves toward the detection area for detection; Placing a standard obstacle at a predetermined position within the detection area, and closing a switch element of a power module to provide an electrical signal to the time monitor; The time monitor records the obstacle arrival time and the obstacle measurement time; and The detection response time of the vehicle-mounted ultrasonic radar is calculated based on the obstacle arrival time and the obstacle measurement time.

[0014] Furthermore, the standard obstacle is moved successively to two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar in the detection area, and the power supply module provides an electrical signal to the time monitor through the corresponding closed switching elements to obtain the obstacle arrival time and obstacle measurement time at the two extreme positions respectively, and calculate the detection response time corresponding to the two extreme positions.

[0015] Furthermore, the method also includes: calculating the tolerance of the detection response time of the vehicle-mounted ultrasonic radar according to the detection response time of the two extreme positions.

[0016] After adopting the above technical scheme, the embodiment of the present invention has at least the following beneficial effects: the embodiment of 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 the time monitor, then controls the vehicle-mounted ultrasonic radar to send waves toward the detection area of ​​the test site to detect obstacles, and then moves the standard obstacle to the predetermined position of the detection area, and at the same time closes the switch element so that the time monitor receives the electrical signal provided by the power module through the power supply line and enters the monitoring state, and the time monitor can record the time of entering the monitoring state as the obstacle arrival time, and at the same time, the vehicle-mounted ultrasonic radar always sends waves to detect obstacles in the detection area uninterruptedly, and when it detects the standard obstacle, it will generate a corresponding detection signal and send it out, the time monitor does not receive the detection signal when it does not enter the monitoring state or does not process it after receiving it, and after entering the monitoring state, the first detection signal received from the vehicle-mounted ultrasonic radar is recorded as the obstacle measurement time, and finally, the obstacle measurement time and the obstacle arrival time are combined to quickly and accurately calculate the detection response time corresponding to the vehicle-mounted ultrasonic radar, and the entire test system has a simple structure, low cost, and high test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an optional embodiment of the vehicle-mounted ultrasonic radar detection response time testing system of the present invention.

[0018] Figure 2 The present invention is a flowchart of the steps of an optional embodiment of the vehicle-mounted ultrasonic radar detection response time testing method of the present invention. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0020] like Figure 1 As shown, an optional embodiment of the present invention provides a vehicle-mounted ultrasonic radar detection response time test system, comprising: 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; A standard obstacle 3 is arranged at a predetermined position in the detection area 12; A time monitor 5 connected to the vehicle-mounted ultrasonic radar A; and A power supply module 7 for providing an electrical signal to the time monitor 5, wherein the power supply circuit 70 is provided with a switch element 72 for controlling the on and off of the power supply circuit 70; The time monitor 5 enters the monitoring state when the switch element 72 switches from open to closed and obtains the electrical signal provided by the power module 7, and records the time of entering the monitoring state as the obstacle arrival time, and records the first detection signal of the standard obstacle received from the vehicle-mounted ultrasonic radar A after entering the monitoring state as the obstacle measurement time.

[0021] In the embodiment of the present invention, a test site 1 is set up, a vehicle-mounted ultrasonic radar A to be tested is placed in the equipment placement area 10 of the test site 1 and connected to a time monitor 5, and then the vehicle-mounted ultrasonic radar A is controlled to emit waves toward the detection area 12 of the test site 1 to detect obstacles, and then the standard obstacle 3 is moved to a predetermined position of the detection area 12, and at the same time, the switch element 72 is closed so that the time monitor 5 receives the electrical signal provided by the power module 7 through the power supply line 70 and enters the monitoring state, and the time monitor 5 can record the time of entering the monitoring state as the obstacle arrival time, and at the same time, the vehicle-mounted ultrasonic radar A is controlled to emit waves toward the detection area 12 of the test site 1 to detect obstacles, and then the standard obstacle 3 is moved to the ... standard obstacle 3 is moved to the predetermined position of the detection area 12, and at the same time, the standard obstacle 3 is moved to the predetermined position of the detection area 12, and at the same time, the standard obstacle 3 is moved to the predetermined position of the detection area 12, and at the same time, the standard obstacle 3 is moved to the predetermined position of the detection area 12, and at the same time, the standard obstacle 3 is moved to the predetermined position of the detection area 12, and at the same time, the standard obstacle 3 is moved to the predetermined position of the detection area 12, and at the same time Radar A is always continuously emitting waves to detect obstacles in the detection area 12. When it detects the standard obstacle 3, it will generate and send a corresponding detection signal. The time monitor 5 does not receive the detection signal before entering the monitoring state or does not process it after receiving it. After entering the monitoring state, the first detection signal received from the vehicle-mounted ultrasonic radar A is recorded as the obstacle measurement time. Finally, the detection response time corresponding to the vehicle-mounted ultrasonic radar A can be quickly and accurately calculated by combining the obstacle measurement time and the obstacle arrival time. The entire test system has a simple structure, low cost, and high test efficiency.

[0022] In an optional embodiment of the present invention, Figure 1As shown, the switch element 72 is arranged at the position where the standard obstacle 3 is predetermined in the detection area 12 and is controlled to be opened or closed by the standard obstacle 3. In this embodiment, the switch element 72 is arranged at the predetermined position in the detection area 12. When the standard obstacle 3 moves to the predetermined position of the detection area 10, the switch element 72 is directly controlled to be closed by the touch pressure of the standard obstacle 3, thereby reducing the error. Of course, it is understandable that the switch element 72 can be arranged next to the time monitor 5 so that the tester can manually operate it to open or close, which can also realize the control of the power supply line 70.

[0023] In an optional embodiment of the present invention, Figure 1 As shown, the power supply module 7 selectively provides an electrical signal to the time monitor 5 through two parallel power supply lines 70, and each of the power supply lines is provided with a switch element 72, and the setting positions of the switch elements 72 in the two power supply lines in the detection area 12 respectively correspond to the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A. In this embodiment, two power supply lines 70 are set to selectively provide an electrical signal to the time monitor 5, and each power supply line 70 is respectively provided with a corresponding switch element 72, and the switch elements 72 of the two power supply lines are respectively set to the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A to be tested in the detection area 12. By respectively testing and obtaining the detection response time of the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A, it is possible to more accurately judge whether the detection response time of the vehicle-mounted ultrasonic radar A is qualified.

[0024] In an optional embodiment of the present invention, Figure 1 As shown, the equipment placement area 10 is provided with a plurality of mounting seats 101 corresponding to the positions of the vehicle-mounted ultrasonic radars A installed in the motor vehicle and used to correspondingly place the vehicle-mounted ultrasonic radars A. The time monitor 5 is connected to each vehicle-mounted ultrasonic radar A to determine the obstacle measurement time according to the first detection signal sent by each vehicle-mounted ultrasonic radar A after comprehensive calculation when detecting the standard obstacle 3. In this embodiment, the plurality of vehicle-mounted ultrasonic radars A of the vehicle-mounted radar system can be placed one by one in the plurality of mounting seats 101 in the equipment placement area 10 for simultaneous testing. When detecting the standard obstacle 3, each vehicle-mounted ultrasonic radar A of the vehicle-mounted radar system will perform comprehensive calculation and output a comprehensive detection signal by itself, and the time monitor 5 will record the time of receiving the comprehensive detection signal as the obstacle measurement time, thereby realizing the comprehensive test of the plurality of vehicle-mounted ultrasonic radars A of a vehicle-mounted radar system.

[0025] In an optional embodiment of the present invention, Figure 1As shown, the time monitor 5 is an oscilloscope. This embodiment uses a common oscilloscope as the time monitor 5, which can monitor the obstacle position information and time sent by the vehicle-mounted ultrasonic radar, and can also monitor the closed switch electrical signal information and time, so as to output the obstacle arrival time and the obstacle measurement time. In the specific implementation, the oscilloscope and the vehicle-mounted ultrasonic radar A are powered on and started at the same time, and the oscilloscope enters the monitoring state when receiving the voltage / current and other electrical signals from the power module 5.

[0026] In an optional embodiment of the present invention, Figure 1 As shown, the equipment installation area 10 is also provided with a carrier 8, and the mounting seat 101 is correspondingly arranged on the top surface of the carrier 8 so that the vehicle-mounted ultrasonic radar A installed on the mounting seat 101 is higher than the obstacle setting plane of the detection area 12. In this embodiment, the mounting platform 8 is set to simulate the installation height of the vehicle-mounted ultrasonic radar A on the motor vehicle, so that the height difference between the vehicle-mounted ultrasonic radar A placed on the carrier 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, so as to better simulate 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 standards or industry standards, and is usually a PVC pipe with a diameter of 75mm×1000mm, which is simple to obtain and has a low cost.

[0027] In an optional embodiment of the present invention, 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. This embodiment directly uses the flat ground as the test site 1 to facilitate testing, and the equipment placement area 10 is set at one end of the test site, which is conducive to reducing the footprint of the test site 1.

[0028] On the other hand, Figure 2 As shown, an embodiment of the present invention provides a testing method for a detection response time testing system of a vehicle-mounted ultrasonic radar A based on any of the above embodiments, comprising the following steps: S1: placing the vehicle-mounted ultrasonic radar A to be tested in the equipment placement area 10 of the test site, and controlling the vehicle-mounted ultrasonic radar A to emit waves toward the detection area 12 for detection; S2: placing the standard obstacle 3 at a predetermined position in the detection area 12, and closing the switch element 72 of the power module to provide an electrical signal to the time monitor 5; S3: The time monitor 5 records the obstacle arrival time and the obstacle detection time; and S4: Calculate the detection response time of the vehicle-mounted ultrasonic radar A according to the obstacle arrival time and the obstacle measurement time.

[0029] In the embodiment of the present invention, the vehicle-mounted ultrasonic radar A to be tested is placed in the equipment placement area 10 of the test site 1 and connected to the time monitor 5 through the above method, and then the vehicle-mounted ultrasonic radar A is controlled to emit waves toward the detection area 12 of the test site 1 to detect obstacles, and then the standard obstacle 3 is moved to the predetermined position of the detection area 12, and the switch element 72 is closed at the same time so that the time monitor 5 receives the electrical signal provided by the power module 7 through the power supply line 70 and enters the monitoring state, and the time monitor 5 can record the time of entering the monitoring state as the obstacle arrival time, and at the same time, the vehicle-mounted ultrasonic radar A is always continuously emitting waves to detect obstacles in the detection area 12. When it detects the standard obstacle 3, it will generate and send a corresponding detection signal. The time monitor 5 does not receive the detection signal before entering the monitoring state or does not process it after receiving it. After entering the monitoring state, it records the first detection signal received from the vehicle-mounted ultrasonic radar A as the obstacle measurement time. Finally, the detection response time corresponding to the vehicle-mounted ultrasonic radar A can be quickly and accurately calculated by combining the obstacle measurement time and the obstacle arrival time. The entire test system has a simple structure, low cost, and high test efficiency.

[0030] In an optional embodiment of the present invention, the standard obstacle 3 is moved successively to the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A in the detection area 12, and the power module 7 provides an electrical signal to the time monitor 5 through the corresponding closed switch element 72 to obtain the obstacle arrival time and obstacle measurement time at the two extreme positions respectively, and calculate the detection response time corresponding to the two extreme positions. In this embodiment, by moving the standard obstacle to the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A respectively, and the power module 7 provides an electrical signal to the time monitor 5 through the corresponding closed switch element 72, the detection response time of the two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar A can be tested and obtained respectively, thereby more accurately judging whether the detection response time of the vehicle-mounted ultrasonic radar A is qualified.

[0031] In an optional embodiment of the present invention, the method further includes: calculating the tolerance of the detection response time of the vehicle-mounted ultrasonic radar A according to the detection response time of the two extreme positions. In this embodiment, the tolerance of the detection response time of the vehicle-mounted ultrasonic radar A is calculated based on the detection response time of the two extreme positions, so as to facilitate the subsequent application of the detection response time of the vehicle-mounted ultrasonic radar A.

[0032] In a 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 time when the obstacle is measured; the standard test distance range is usually [100cm, 150cm], so the corresponding distances of the two extreme positions, point P and point Q, 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 .

[0033] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. A vehicle-mounted ultrasonic radar detection response time test system, characterized in that: The system comprises: 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; A standard obstacle disposed at a predetermined position within the detection area; a time monitor connected to the vehicle-mounted ultrasonic radar; and A power supply module that provides an electrical signal to the time monitor via a power supply line, wherein a switch element that controls the on / off of the power supply line is provided in the power supply line; The time monitor enters the monitoring state when the switch element switches from open to closed and obtains the electrical signal provided by the power module, and records the time of entering the monitoring state as the obstacle arrival time, and records the first detection signal of the standard obstacle received from the vehicle-mounted ultrasonic radar after entering the monitoring state as the obstacle measurement time.

2. The vehicle-mounted ultrasonic radar detection response time test system according to claim 1, characterized in that: The switch element is arranged at a position in the detection area where the standard obstacle is predetermined to be arranged and is controlled to be opened or closed by the standard obstacle.

3. The vehicle-mounted ultrasonic radar detection response time test system as claimed in claim 2, characterized in that: The power supply module selectively provides the electrical signal to the time monitor through two parallel power supply lines. A switching element is provided in each power supply line. The setting positions of the switching elements in the two power supply lines in 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 test system as claimed in claim 3, characterized in that: The equipment placement area is provided with a plurality of mounting sockets corresponding to the positions of each vehicle-mounted ultrasonic radar installed in the motor vehicle and used to place each of the vehicle-mounted ultrasonic radars. The time monitor is connected to each of the vehicle-mounted ultrasonic radars to determine the time when the obstacle is measured based on the first detection signal sent by each vehicle-mounted ultrasonic radar after comprehensive calculation when detecting the standard obstacle.

5. The vehicle-mounted ultrasonic radar detection response time test system according to claim 1 or 4, characterized in that: The time monitor is an oscilloscope.

6. The vehicle-mounted ultrasonic radar detection response time test system as claimed in claim 1, characterized in that: The equipment installation area is also provided with a platform, and the mounting seat is correspondingly arranged on the top surface of the platform so that the vehicle-mounted ultrasonic radar installed on the mounting seat is higher than the obstacle setting plane of the detection area.

7. The vehicle-mounted ultrasonic radar detection response time test system according to 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.

8. A test method for the vehicle-mounted ultrasonic radar detection response time test system according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: The vehicle-mounted ultrasonic radar to be tested is placed in the equipment placement area of ​​the test site, and the vehicle-mounted ultrasonic radar is controlled to emit waves toward the detection area for detection; Placing a standard obstacle at a predetermined position within the detection area, and closing a switch element of a power module to provide an electrical signal to the time monitor; The time monitor records the obstacle arrival time and the obstacle measurement time; and The detection response time of the vehicle-mounted ultrasonic radar is calculated based on the obstacle arrival time and the obstacle measurement time.

9. The vehicle-mounted ultrasonic radar detection response time testing method according to claim 8, characterized in that: The standard obstacle is moved successively to two extreme positions of the standard test distance range of the vehicle-mounted ultrasonic radar in the detection area, and the power supply module provides an electrical signal to the time monitor through the corresponding closed switch element to obtain the obstacle arrival time and obstacle measurement time at the two extreme positions respectively, and calculate the detection response time corresponding to the two extreme positions.

10. The vehicle-mounted ultrasonic radar detection response time testing method according to claim 9, characterized in that: The method further includes: calculating a tolerance of the detection response time of the vehicle-mounted ultrasonic radar according to the detection response times of two extreme positions.

Images