Doppler radar detection device

Abstract

The Doppler radar detection device comprises a signal generation controller and a signal reflector, the signal generation controller comprises a frequency synthesizer, a main control chip and an amplification circuit, the main control chip is respectively in communication connection with the frequency synthesizer and the amplification circuit, the frequency synthesizer is in communication connection with the amplification circuit, and the signal reflector is in communication connection with the amplification circuit. Through the above arrangement, the Doppler radar echo generator avoids a complex radio frequency circuit and structure necessary for a traditional Doppler radar echo generator, is not limited by the working frequency of a measured radar sensor, has certain versatility, greatly reduces the cost of realizing Doppler signals, and improves the reliability of the Doppler radar echo generator. And large-scale use of the Doppler signal generating device in radar sensor production becomes possible.

Description

Technical Field

[0001] The utility model relates to the technical field of Doppler radar detection, in particular to a Doppler radar detection device. Background Art

[0002] At present, the test of the receiving performance of Doppler radar mainly depends on the Doppler radar echo generator. It can be understood that the circuit and structure of such Doppler radar echo generators are relatively complex, the technical implementation is difficult, the cost is high, and for radar sensor products with different operating frequencies, echo generators with different operating frequencies need to be customized, and the versatility is poor. Therefore, it is mainly used for scientific research or the test of a small number of high-end products at present, which greatly limits the application scenarios of such products.

[0003] With the increasing popularity of Doppler radar sensor products and the continuous expansion of the application fields, a large number of Doppler radar sensor manufacturers have emerged in the market, and the daily output of Doppler radar sensors of some enterprises has reached more than 100,000. Therefore, in the production process, it is inevitable to conduct large-scale tests on a large number of products. However, the existing traditional Doppler radar echo generators are expensive and have poor versatility, resulting in their inability to be widely applied in the batch production and detection of such products. Summary of the Utility Model

[0004] The purpose of the utility model is to propose a Doppler radar detection device for the technical problems existing in the background art, including a signal generation controller and a signal reflector. The signal generation controller includes a frequency synthesizer, a main control chip and an amplification circuit. The main control chip is respectively communicatively connected with the frequency synthesizer and the amplification circuit. The frequency synthesizer is communicatively connected with the amplification circuit, and the amplification circuit is communicatively connected with the signal reflector.

[0005] Further, the amplification circuit includes a digital potentiometer, a buffer amplification circuit and a power amplifier circuit. The digital potentiometer is respectively communicatively connected with the frequency synthesizer, the buffer amplification circuit and the main control chip. The buffer amplification circuit is communicatively connected with the power amplifier circuit, and the power amplifier circuit is communicatively connected with the signal reflector.

[0006] Further, the frequency synthesizer is a DDS chip, and the signal reflector is a low-frequency loudspeaker.

[0007] Further, it further includes an infrared receiving circuit, and the infrared receiving circuit is communicatively connected with the main control chip.

[0008] Further, it further includes a key control circuit, and the key control circuit is communicatively connected with the main control chip.

[0009] Further, it further includes a digital tube display circuit, and the digital tube display circuit is communicatively connected with the main control chip.

[0010] The utility model has the following beneficial technical effects compared with the prior art: From the analysis of the generation mechanism of Doppler signals, the Doppler radar detection device of the utility model uses a low-cost low-frequency loudspeaker as the reflector of radar signals, and is equipped with functional modules such as a signal generation controller with adjustable frequency and amplitude, and a power amplifier circuit, etc., to realize the detection of the radar.

[0011] Specifically, the signal generation controller can generate low-frequency signals, and the frequency of the low-frequency signals can be set according to the characteristic frequency of the detection target of the radar sensor to be measured. Then, through the amplification circuit, the loudspeaker is driven to generate vibrations with a fixed frequency and amplitude. During the detection, the antenna of the radar sensor to be measured is directed at the loudspeaker, and the radar sensor is placed at an appropriate position in front of the loudspeaker. At this time, the signal receiving end of the radar sensor to be measured can obtain regular Doppler signals from the echo of the loudspeaker to realize the performance detection of the radar sensor.

[0012] Based on the above analysis, it can be understood that the utility model avoids the complex radio frequency circuits and structures necessary for traditional Doppler radar echo generators, and is not limited by the operating frequency of the radar sensor to be measured, has a certain generality, greatly reduces the cost of realizing Doppler signals, and provides the possibility for the large-scale use of Doppler signal generation devices in the production of radar sensors. Brief Description of the Drawings

[0013] Figure 1 It is the connection relationship diagram of each module of the device of the utility model;

[0014] Figure 2 It is the connection relationship diagram of the amplification circuit of the utility model;

[0015] Figure 3 It is the flow chart of the method of the utility model;

[0016] Figure 4 It is the flow chart of step S2 of the method of the utility model;

[0017] Figure 5 It is the flow chart of step S23 of the method of the utility model. Detailed Embodiments

[0018] It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 thus should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or a specific connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication between two components inside. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0021] The following will make a detailed description of the specific embodiments of the present utility model with reference to the drawings.

[0022] Embodiment 1:

[0023] As Figure 1 - Figure 2 shown, the present utility model provides a Doppler radar detection device, which includes a signal generation controller 1 and a signal reflector 2. The signal generation controller 1 includes a frequency synthesizer 11, a main control chip 12, and an amplification circuit. The main control chip 12 is communicatively connected to the frequency synthesizer 11 and the amplification circuit respectively. The frequency synthesizer 11 is communicatively connected to the amplification circuit 13, and the amplification circuit 13 is communicatively connected to the signal reflector 2.

[0024] It can be understood that the signal generation controller 1 of this embodiment can be used to generate an output signal with a specific frequency. Specifically, the frequency synthesizer 11 is used to generate an output signal, such as generating a sine wave with a specific frequency, etc. The main control chip 12 acts on the frequency synthesizer 11 to control the frequency of the output signal of the frequency synthesizer 11. Further, the amplification circuit 13 can, based on the control of the main control chip 12, achieve the amplification of the output signal and the adjustment of the amplitude. The output signal is finally transmitted to the signal reflector 2 through the amplification circuit 13, so that the signal reflector 2 generates vibrations with a fixed frequency and amplitude.

[0025] Further, in this embodiment, the amplification circuit 13 includes a digital potentiometer 131, a buffer amplification circuit 132, and a power amplifier circuit 133. The digital potentiometer 131 is communicatively connected to the frequency synthesizer 11, the buffer amplification circuit 132, and the main control chip 12 respectively. The buffer amplification circuit 132 is communicatively connected to the power amplifier circuit 133, and the power amplifier circuit 133 is communicatively connected to the signal reflector 2.

[0026] With the above settings, the main control chip 12 communicates with the digital potentiometer 131, and controls the amplitude of the output signal by adjusting the resistance value of the digital potentiometer 131. Further, after the amplitude of the output signal, it will pass through the buffer amplification circuit 132 and the power amplifier circuit 133 and be transmitted to the signal reflector 2.

[0027] Further, as an implementation manner of this embodiment, the frequency synthesizer 11 is a DDS chip, and the signal reflector 2 is a low-frequency speaker. It can be understood that the DDS chip has the advantages of low cost, low power consumption, high resolution, and fast conversion time, and the low-frequency speaker has the advantage of low price.

[0028] Further, in this embodiment, the Doppler radar detection device further includes an infrared receiving circuit 3, a key control circuit 4, and a digital tube display circuit 5. The infrared receiving circuit 3 is communicatively connected to the main control chip 12, the key control circuit 4 is communicatively connected to the main control chip 12, and the digital tube display circuit 5 is communicatively connected to the main control chip 12. It can be understood that the infrared receiving circuit 3 and the key control circuit 4 are used to provide two human-machine control methods of "infrared remote control and key operation", and the digital tube display circuit 5 is used to realize the human-machine interaction between the operator and the device.

[0029] Embodiment Two:

[0030] As Figure 1 - Figure 5 shown, a Doppler radar detection method is also proposed, which is applied to the Doppler radar detection device of Embodiment One. Specifically, the Doppler radar detection method includes the following steps:

[0031] S1: The radar emits a radio frequency signal with a fixed frequency and acts on the signal reflector 2;

[0032] S2: The signal generation controller 1 generates a low-frequency signal and acts on the signal reflector 2 to make the signal reflector 2 generate vibrations with a fixed frequency and amplitude;

[0033] S3: The signal reflector 2 returns the echo signal superimposed with its own vibration to the radar to realize the detection of the radar.

[0034] Further, step S2: "The signal generation controller 1 generates a low-frequency signal, which acts on the signal reflector 2 to cause the signal reflector 2 to vibrate at a fixed frequency and amplitude" further includes the following steps:

[0035] S21: The main control chip 12 controls the output frequency of the frequency synthesizer 11;

[0036] S22: The frequency synthesizer 11 outputs an output signal with a specific frequency;

[0037] S23: The output signal is transmitted to the signal reflector 2 through the amplifier circuit to drive the signal reflector 2 to vibrate at a fixed frequency.

[0038] Further, "The output signal is transmitted to the signal reflector 2 through the amplifier circuit" further includes the following steps:

[0039] S231: The main control chip 12 controls the amplitude of the output signal by adjusting the resistance value of the digital potentiometer;

[0040] S232: The output signal is transmitted to the signal reflector 2 through the buffer amplifier circuit 132 and the power amplifier circuit 133 to drive the signal reflector 2 to vibrate at a fixed amplitude.

[0041] Further, the frequency of the low-frequency signal can be set according to the characteristic frequency of the detection target of the radar sensor to be measured.

[0042] In summary, from the analysis of the generation mechanism of the Doppler signal, the Doppler radar detection device of the present invention uses an inexpensive low-frequency speaker as the reflector of the radar signal, and is equipped with functional modules such as a signal generation controller 1 with adjustable frequency and amplitude, and a power amplifier circuit, etc., to realize the detection of the radar.

[0043] Specifically, the signal generation controller 1 can generate a low-frequency signal, the frequency of which can be set according to the characteristic frequency of the detection target of the radar sensor to be measured, and then through the amplifier circuit, it drives the speaker to vibrate at a fixed frequency and amplitude. During detection, the antenna of the radar sensor to be measured is directed at the speaker, and the radar sensor is placed at an appropriate position in front of the speaker. At this time, the signal receiving end of the radar sensor to be measured can obtain a regular Doppler signal from the echo of the speaker to realize the performance detection of the radar sensor.

[0044] Based on the above analysis, it can be understood that the present invention avoids the complex radio frequency circuits and structures necessary for traditional Doppler radar echo generators, and is not limited by the operating frequency of the measured radar sensor, has a certain degree of versatility, greatly reduces the cost of realizing Doppler signals, and provides the possibility for the large-scale use of Doppler signal generation devices in the production of radar sensors.

[0045] The above are one or more embodiments provided in combination with specific contents, and it is not determined that the specific implementation of the present utility model is only limited to these descriptions. Any method, structure, etc. that is similar or identical to the present utility model, or any technical deduction or replacement made under the premise of the concept of the present utility model, should be regarded as the protection scope of the present utility model.

Claims

1. A Doppler radar detection device, characterized in that: The invention comprises a signal generation controller (1) and a signal reflector (2); the signal generation controller (1) comprises a frequency synthesizer (11), a main control chip (12) and an amplifier circuit (13); the main control chip (12) is respectively connected to the frequency synthesizer (11) and the amplifier circuit (13); the frequency synthesizer (11) is connected to the amplifier circuit (13); and the amplifier circuit (13) is connected to the signal reflector (2).

2. A Doppler radar detection device according to claim 1, characterized in that: The amplifier circuit (13) comprises a digital potentiometer (131), a buffer amplifier circuit (132) and a power amplifier circuit (133); the digital potentiometer (131) is respectively connected in communication with the frequency synthesizer (11), the buffer amplifier circuit (132) and the main control chip (12); the buffer amplifier circuit (132) is connected in communication with the power amplifier circuit (133); and the power amplifier circuit (133) is connected in communication with the signal reflector (2).

3. A Doppler radar detection device according to claim 1, characterized in that: The frequency synthesizer (11) is a DDS chip, and the signal reflector (2) is a low-frequency speaker.

4. A Doppler radar detection device according to claim 1, characterized in that: It also includes an infrared receiving circuit (3), and the infrared receiving circuit (3) is communicatively connected to the main control chip (12).

5. A Doppler radar detection device according to claim 1, characterized in that: It also includes a key control circuit (4), and the key control circuit (4) is communicatively connected to the main control chip (12).

6. A Doppler radar detection device according to claim 1, characterized in that: It also comprises a digital tube display circuit (5), wherein the digital tube display circuit (5) is communicatively connected to the main control chip (12).

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