Test equipment for screening, calibrating and correcting radar module

Abstract

The utility model discloses test equipment for screening, calibrating and correcting a radar module, which comprises a shielding test cabinet, a console is arranged on the outer wall of the shielding test cabinet, a communication bottom plate electrically connected with the console is arranged at the bottom in the shielding test cabinet, a radar fixing device is arranged on the communication bottom plate, and the radar fixing device is connected with the console. A liftable analog signal source is arranged right above the radar fixing device in the shielding test cabinet and is used for receiving an echo signal by a radar module on the radar fixing device; the utility model has the characteristics that the yield of products is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of radar testing equipment, in particular to a testing equipment used for screening, calibration and correction of radar modules. Background Art

[0002] Radar modules based on the millimeter wave frequency band have penetrated into the field of smart homes. The function of the radar module is to sense the human body and transmit the detection information to terminal devices such as lamps, air conditioners, and televisions to respond. When the radar modules are mass-produced, the radar modules will be affected by the dielectric constant of the PCB board, the processing technology of the PCB, etc., resulting in differences in various index parameters of the radar modules in the same batch or different batches. The emergence of this situation affects the reliability and consistency of the radar module, resulting in a low yield rate and increased production costs. Utility Model Content

[0003] The purpose of the utility model is to propose a test device for radar module screening, calibration and correction in view of the technical problems existing in the background technology.

[0004] According to the utility model, a test device for radar module screening, calibration and correction is provided, including a shielded test cabinet, a control console is provided on the outer wall of the shielded test cabinet, a communication base plate electrically connected to the control console is provided in the shielded test cabinet, a radar fixing device is provided on the communication base plate, and a liftable analog signal source is provided above the radar fixing device in the shielded test cabinet, which is used for the radar module on the radar fixing device to receive an echo signal.

[0005] Preferably, the testing device further comprises a conveying mechanism, and the conveying mechanism is used to transfer the radar module into the shielding test cabinet.

[0006] Preferably, the conveying mechanism comprises a conveyor belt, which passes over the radar fixing device and is electrically connected to the control console.

[0007] Preferably, the conveyor belt passes through the left and right side walls of the shielding test cabinet, and a plurality of hollow cavities arranged at equal intervals are provided on the conveyor belt.

[0008] Preferably, a lifting platform electrically connected to the control console is provided on the inner wall of the shielding test cabinet, and the analog signal source is detachably arranged at the bottom of the lifting platform.

[0009] Preferably, a layer of absorbing cotton for shielding external interference is provided on the inner wall of the shielding test cabinet.

[0010] Preferably, the analog signal source is any one of a corner reflector and a metal ball.

[0011] Preferably, the analog signal source is a Doppler simulator.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects: by setting a relatively sealed shielding test cabinet, setting a communication base plate in the shielding test cabinet, setting a radar fixing device on the communication base plate, and setting an analog signal source directly above the radar fixing device, so that after the radar module entering the shielding test cabinet is fixed in position by the radar fixing device, the radar module can transmit electromagnetic waves to the analog signal source, and can also allow the radar module to receive the echo signal of the analog signal source. After receiving the specific command from the control console, the radar module starts to mix the transmission signal and the echo signal to obtain an intermediate frequency signal, and performs a series of operations such as filtering, amplifying, sampling, etc. on the intermediate frequency signal to obtain an intermediate frequency signal. The intermediate frequency signal is converted into a series of data, and then the generated data is transmitted back to the console for analysis through the communication baseboard. The principle of the analysis is that based on the frequency and amplitude of the intermediate frequency signal, from a theoretical point of view, in the shielded test cabinet, if the radar transmission signal is certain, the radar mixes the echo signal reflected by the simulator, and the intermediate frequency signal obtained is also certain. If it is found that the intermediate frequency signal does not meet the theoretical range when analyzing the data, it is considered that the radar under test does not meet the design indicators. It can be concluded whether the radar module under test meets the standards, avoiding the situation where the parameters of various indicators of radar modules in the same batch or different batches are different, thereby improving the product yield and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A test device for radar module screening, calibration and correction provided by the utility model;

[0014] The reference numerals and names of the components in the figures are uniformly described as follows: 1-shielded test cabinet, 2-control console, 3-communication base plate, 4-radar fixture, 5-analog signal source, 6-conveyor belt, 7-lifting platform. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0016] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a specific connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0018] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1As shown, the utility model proposes a test device for screening, calibration and correction of radar modules, including: a shielded test cabinet 1, which is the main structure of the test device and is used to mount other components. A control console 2 is provided on the outer wall of the shielded test cabinet 1. The control console 2 is the hub of the entire system and can analyze radar return data, display test results, save test records, etc. A communication base plate 3 electrically connected to the control console 2 is provided at the inner bottom of the shielded test cabinet 1. A radar fixing device 4 is provided on the communication base plate 3. After the radar module enters the specified position, it is fixed in position by the radar fixing device 4 and power is supplied to the radar module. The communication baseboard 3 is used to receive instructions from the main control device and transmit the data generated by the radar module so that the console 2 can display or record the test results. A liftable analog signal source 5 is provided in the shielding test cabinet 1 directly above the radar fixture 4. When the radar module on the radar fixture 4 receives the echo signal and needs to be screened, the console 2 will send an instruction to the radar module to enable the radar module to emit electromagnetic waves to the analog signal source 5. After the radar module receives the echo signal from the analog signal source 5, the radar module will perform a series of operations such as mixing, filtering, amplification, sampling, etc., and then transmit the sampled data back to the main control system for analysis.

[0020] When using the device to calibrate the radar, the echo signals received by the two radar modules are evaluated to have different values. In this case, the two radar modules need to be manually calibrated to be consistent. When this happens, a standard radar module will be selected as a reference, and the size of the echo signal received in the test system will be used as the standard value. If the echo signal received by the radar module to be tested is larger than the standard value, then the radar module's signal amplification factor is reduced, or the radar module's detection judgment threshold is increased. On the contrary, if the echo signal received by the radar module to be tested is smaller than the standard value, then the radar module's signal amplification factor is increased, or the radar module's detection judgment threshold is reduced.

[0021] In one embodiment, in order to allow the radar module to smoothly enter the shielding test cabinet 1 for screening and calibration, the test equipment also includes a conveying mechanism, which includes a conveyor belt 6. The conveyor belt 6 passes through the top of the radar fixing device 4 and is electrically connected to the console 2. The conveyor belt 6 runs through the left and right side walls of the shielding test cabinet 1. The conveyor belt 6 is provided with a plurality of hollow cavities arranged at equal intervals. The conveyor belt 6 is driven by a servo motor and has an equal-interval hollow design. A radar module can be placed in each hollow part, ensuring that the number of radar modules entering the shielding test cabinet 1 each time is only one, thereby further improving the accuracy of the test.

[0022] In one embodiment, a lifting platform 7 electrically connected to the control console 2 is provided on the inner wall of the shielding test cabinet 1, and the analog signal source 5 is detachably arranged at the bottom of the lifting platform 7, which plays the role of fixing the analog signal source 5 and can adjust the relative position of the radar module to the analog signal source 5.

[0023] In one embodiment, a layer of absorbing cotton is provided on the inner wall of the shielding test cabinet for shielding interference from the electromagnetic environment, human targets or other moving targets, and the absorbing cotton can ensure the accuracy of the test.

[0024] In one embodiment, the analog signal source 5 is any one of a corner reflector and a metal ball. The corner reflector and the metal ball are used for FMCW modulation type radar modules. During the screening process, if the analysis results show that the energy of the echo signal received by the radar module to be tested and the radar standard sample module is close and meets the expected theoretical indicators, then the radar module to be tested is considered to be qualified. By collecting test data of multiple radar modules to be tested, the consistency between the same batches can also be analyzed, which can save time spent in the production process.

[0025] In another embodiment, the analog signal source 5 is a Doppler simulator, which is used for CW modulation type radar modules, and a common 5.8G simulator is selected. During the screening process, the console 2 will control the Doppler simulator to send a series of sine waves to the radar module, and its frequency and amplitude values ​​are fixed. After receiving the sine wave, the radar module will perform operations such as filtering, amplification, sampling, etc., and then send the sampled data back to the main control system for analysis. If the intermediate frequency signal amplitude and frequency received by the module to be tested and the radar standard sample module are close and meet the theoretical indicators, then it is considered that the two modules have good consistency and are qualified.

[0026] The above is a test device or multiple implementation methods for radar module screening, calibration and correction provided in combination with specific content, and it is not considered that the specific implementation of the utility model is limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or a number of technical deductions or replacements based on the concept of the utility model, shall be regarded as the protection scope of the utility model.

Claims

1. A test device for screening, calibrating and correcting radar modules, characterized in that: include: A shielding test cabinet (1), wherein a control console (2) is provided on the outer wall of the shielding test cabinet (1), a communication base plate (3) electrically connected to the control console (2) is provided inside the shielding test cabinet (1), a radar fixing device (4) is provided on the communication base plate (3), and a liftable analog signal source (5) is provided above the radar fixing device (4) inside the shielding test cabinet (1) for receiving an echo signal by a radar module on the radar fixing device (4).

2. The test equipment for radar module screening, calibration and correction according to claim 1, characterized in that: The testing device also includes a conveying mechanism, which is used to transfer the radar module into the shielding test cabinet (1).

3. The test equipment for radar module screening, calibration and correction according to claim 2, characterized in that: The conveying mechanism comprises a conveyor belt (6), which passes above the radar fixing device (4) and is electrically connected to the control console (2).

4. The test equipment for radar module screening, calibration and correction according to claim 3, characterized in that: The conveyor belt (6) passes through the left and right side walls of the shielding test cabinet (1), and a plurality of hollow cavities arranged at equal intervals are provided on the conveyor belt (6).

5. The test equipment for radar module screening, calibration and correction according to claim 1, characterized in that: A lifting platform (7) electrically connected to the control console (2) is provided on the inner wall of the shielding test cabinet (1), and the analog signal source (5) is detachably arranged at the bottom of the lifting platform (7).

6. The test equipment for radar module screening, calibration and correction according to claim 1, characterized in that: A layer of wave-absorbing cotton for shielding external interference is arranged on the inner wall of the shielding test cabinet.

7. The test equipment for radar module screening, calibration and correction according to claim 1, characterized in that: The analog signal source (5) is any one of a corner reflector and a metal ball.

8. The test equipment for radar module screening, calibration and correction according to claim 1, characterized in that: The analog signal source (5) is a Doppler simulator.

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