Channel self-checking system of a radio frequency detection device and self-checking method thereof

Abstract

The application discloses a channel self-checking system of a radio frequency detection device and a self-checking method thereof, and comprises a local oscillator LO, a first signal extraction module DC1, a second signal extraction module DC2, a first program-controlled switch SW1, a second program-controlled switch SW2, a load T1, an analog-digital conversion module ADC, a switching module SW3 and a central control module, wherein the central control module is connected with the local oscillator LO, the first program-controlled switch SW1, the second program-controlled switch SW2 and the analog-digital conversion module ADC; the first signal extraction module DC1 is arranged between the local oscillator LO and the first program-controlled switch SW1 and connected with the switching module SW3; the second signal extraction module DC2 is arranged between the load T1 and the second program-controlled switch and connected with the switching module SW3; and the switching module SW3 is connected with the analog-digital conversion module ADC. The channel self-checking system improves the detection efficiency of an antenna base station and the channel detection precision of a radio frequency detection device.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of channel self-checking, and particularly relates to a channel self-checking system of a radio frequency detection device and a self-checking method thereof. BACKGROUND

[0002] The electromagnetic frequency radiated by the device to the space ranges from 300 kHz to 300 GHz. Radio frequency is a kind of high-frequency alternating current electromagnetic wave, which is also called RF. The alternating current with less than 1000 changes per second is called low-frequency current, and the alternating current with more than 10000 changes per second is called high-frequency current, and the radio frequency belongs to the high-frequency current.

[0003] The existing radio frequency device includes an antenna base station. Before the antenna base station is shipped, the performance indicators of the antenna base station must be detected, which requires various radio frequency detection devices, such as a program-controlled attenuation device, a channel simulation device or a program-controlled switch device, and the like. Then, the antenna base station is connected to the radio frequency detection device, and a signal receiving device is connected to the output end of the radio frequency detection device to measure specific data. However, once the signal receiving device has an abnormal signal, the antenna base station, the radio frequency device and the signal receiving device need to be detected one by one by the operator, so as to determine whether the problem is caused by the antenna base station itself or the radio frequency detection device. This greatly reduces the detection efficiency of the actual antenna base station. SUMMARY

[0004] In view of the problems in the prior art, the application provides a channel self-checking system of a radio frequency detection device and a self-checking method thereof, which improves the detection efficiency of the antenna base station and the channel detection accuracy of the radio frequency detection device.

[0005] To achieve the above technical purposes, the application adopts the following technical scheme: a channel self-checking system of a radio frequency detection device, comprising: a local oscillator LO, a first signal extraction module DC1, a second signal extraction module DC2, a first program-controlled switch SW1, a second program-controlled switch SW2, a load T1, an analog-to-digital conversion module ADC, a switching module SW3 and a central control module, the central control module is connected with the local oscillator LO, the first program-controlled switch SW1, the second program-controlled switch SW2 and the analog-to-digital conversion module ADC, the local oscillator is arranged at the signal input end of the radio frequency detection device DUT, the first signal extraction module DC1 is arranged between the local oscillator LO and the first program-controlled switch SW1, and the first signal extraction module DC1 is connected with the switching module SW3; the load is arranged at the signal output end of the radio frequency detection device DUT, the second signal extraction module DC2 is arranged between the load T1 and the second program-controlled switch, the second signal extraction module DC2 is connected with the switching module SW3; and the switching module SW3 is connected with the analog-to-digital conversion module ADC.

[0006] Further, the input end of the first program-controlled switch SW1 is electrically connected with the input end of the radio frequency detection device DUT, and the input end of the second program-controlled switch SW2 is electrically connected with the output end of the device detection device DUT.

[0007] Further, the first signal extraction module DC1 and the second signal extraction module DC2 are couplers.

[0008] Further, the isolation end of the first signal extraction module DC1 is connected with the switching module SW3.

[0009] Further, the first standing wave signal extraction module C1 is further included, the port 1 of the first standing wave signal extraction module C1 is connected with the first signal extraction module DC1, the port 2 of the first standing wave signal extraction module C1 is connected with the output end of the first program-controlled switch SW1, and the port 3 of the first standing wave signal extraction module C1 is connected with the switching module SW3.

[0010] Further, the isolation end of the second signal extraction module DC2 is connected with the switching module SW3.

[0011] Further, the second standing wave signal extraction module C2 is further included, the port 1 of the second standing wave signal extraction module C2 is connected with the second signal extraction module DC2, the port 2 of the second standing wave signal extraction module C2 is connected with the load T1, and the port 3 of the second standing wave signal extraction module C2 is connected with the switching module SW3.

[0012] Further, the first standing wave signal extraction module C1 and the second standing wave signal extraction module C2 are both loopers.

[0013] Further, the application further provides a self-checking method of the channel self-checking system of the radio frequency detection device.

[0014] In step S1, when the antenna base station uses the radio frequency detection device DUT to perform performance detection, and data abnormity occurs, an operator starts the local oscillator LO through the central control module to give a signal to the radio frequency detection device, and the signal is extracted by the first signal extraction module DC1 after being transmitted from the local oscillator, and is input into the switching module SW3.

[0015] In step S2, when the signal enters the radio frequency detection device DUT, a standing wave is generated, the standing wave signal size of the input end of the radio frequency detection device DUT is measured by the first standing wave signal extraction module C1, and is input into the switching module SW3.

[0016] In step S3, the signal generated by the local oscillator is extracted by the second signal extraction module DC2 after being transmitted from the radio frequency detection device DUT, and is input into the switching module SW3.

[0017] Step S4, the standing wave generated after the signal enters the radio frequency detection device DUT is measured by the second standing wave signal extraction module C2 and input to the switching module SW3;

[0018] Step S5, the switching module SW3 inputs the signal into the control module one by one through switching, compares the signal power extracted by the first signal extraction module DC1 with the signal power extracted by the second signal extraction module DC2, and if it is not the set value, the radio frequency detection device has a problem.

[0019] Compared with the prior art, the present application has the following beneficial effects: the channel self-checking system of the radio frequency detection device extracts the power signal generated by the local oscillator through the first signal extraction module DC1, extracts the power signal transmitted from the radio frequency detection device by the local oscillator through the second signal extraction module DC2, compares the signal power extracted by the first signal extraction module DC1 with the signal power extracted by the second signal extraction module DC2, and if it is not the set value, it means that the radio frequency detection device has a problem, avoiding the one-by-one investigation of the radio frequency detection device and the antenna base station, improving the performance detection efficiency of the antenna base station; the present application can improve the number of detection channels of the channel self-checking system through the channel switching of the first program-controlled switch SW1 and the second program-controlled switch SW2, and is suitable for the radio frequency detection device with multiple inputs and multiple outputs; through the first standing wave signal extraction module C1 and the second standing wave signal extraction module C2, the signals at the input and output ends of the radio frequency detection device can be detected more accurately, thereby improving the channel detection accuracy of the radio frequency detection device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the circuit diagram of the channel self-checking system of the radio frequency detection device of the present application.

[0021] Figure 2 It is the self-checking method flow chart of the channel self-checking system of the radio frequency detection device of the present application. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be further explained and described below in combination with the drawings.

[0023] As Figure 1The application discloses a circuit diagram of a channel self-checking system of a radio frequency detection device, which comprises a local oscillator (LO), a first signal extraction module DC1, a second signal extraction module DC2, a first program-controlled switch SW1, a second program-controlled switch SW2, a load T1, an analog-digital conversion module ADC, a switching module SW3 and a central control module, wherein the local oscillator is arranged at a signal input end of the radio frequency detection device DUT and can provide a signal for the radio frequency detection device DUT by starting the local oscillator; the central control module is connected with the local oscillator, the first program-controlled switch SW1, the second program-controlled switch SW2 and the analog-digital conversion module ADC; the first signal extraction module DC1 is arranged between the local oscillator and the first program-controlled switch SW1 and connected with the switching module SW3; the second signal extraction module DC2 is arranged between the load T1 and the second program-controlled switch and connected with the switching module SW3; the load T1 is arranged at a signal output end of the radio frequency detection device DUT; an input end of the first program-controlled switch SW1 is electrically connected with the input end of the radio frequency detection device DUT; an input end of the second program-controlled switch SW2 is electrically connected with the output end of the radio frequency detection device DUT; the channel self-checking system can improve the number of detection channels and adapt to the radio frequency detection device with multiple inputs and multiple outputs by switching the channels of the first program-controlled switch SW1 and the second program-controlled switch SW2; the switching module SW3 is connected with the analog-digital conversion module ADC and is a program-controlled switch; the switching module SW3 can concentrate a plurality of to-be-detected signals together and detect the signals one by one in a switching mode, so that the number of analog-digital conversion modules can be reduced, thereby reducing the cost of the channel self-checking system; the power signal generated by the local oscillator is extracted by the first signal extraction module DC1, the power signal transmitted from the radio frequency detection device DUT by the local oscillator is extracted by the second signal extraction module DC2, the signal power extracted by the first signal extraction module DC1 is compared with the signal power extracted by the second signal extraction module DC2, and if the signal power is not the set value, it indicates that the radio frequency detection device DUT has a problem; even if data abnormality occurs in the detection process of the antenna base station, the operator can quickly detect whether the channel of the radio frequency detection device DUT has a problem by the channel self-checking system, the radio frequency detection device and the antenna base station are not detected one by one, and the performance detection efficiency of the antenna base station is improved.

[0024] The first signal extraction module DC1 and the second signal extraction module DC2 in the application are couplers, and the signals of the input radio frequency detection device DUT and the output radio frequency detection device DUT are extracted by coupling, so that the disturbance to the signals of the input radio frequency detection device DUT and the output radio frequency detection device DUT is minimized, thereby improving the accuracy of the extraction of the signals of the input radio frequency detection device DUT and the output radio frequency detection device DUT. Specifically, the isolation end of the first signal extraction module DC1 is connected with the switching module SW3, and the isolation end of the second signal extraction module DC2 is connected with the switching module SW3.

[0025] Since the signal generated by the local oscillator will generate a standing wave when being transmitted to the radio frequency detection device DUT or after being transmitted out of the radio frequency detection device DUT, the standing wave will affect the final result of the detection, therefore, the first standing wave signal extraction module C1 and the second standing wave signal extraction module C2 are further arranged in the channel self-checking system of the application, and the first standing wave signal extraction module C1 and the second standing wave signal extraction module C2 are both loopers, which can more accurately and effectively test the standing wave signals of the input end and the output end of the radio frequency detection device DUT. Specifically, port 1 of the first standing wave signal extraction module C1 is connected with the first signal extraction module DC1, port 2 of the first standing wave signal extraction module C1 is connected with the output end of the first program-controlled switch SW1, and port 3 of the first standing wave signal extraction module C1 is connected with the switching module SW3; port 1 of the second standing wave signal extraction module C2 is connected with the second signal extraction module DC2, port 2 of the second standing wave signal extraction module C2 is connected with the load T1, and port 3 of the second standing wave signal extraction module C2 is connected with the switching module SW3. Through the first standing wave extraction module C1 and the second standing wave extraction module C2, the standing wave signal sizes at the input and output ends of the radio frequency detection device DUT can be measured and transmitted to the central control module at the same time, and the signals at the input and output ends of the radio frequency detection device DUT can be more accurately detected through the calculation of the central control module, thereby improving the channel detection precision of the radio frequency detection device DUT.

[0026] As Figure 2 The application further provides a self-checking method of the channel self-checking system of the radio frequency detection device, and specifically includes the following steps:

[0027] In step S1, when the antenna base station uses the radio frequency detection device DUT to perform performance detection, and data abnormality occurs, an operator starts the local oscillator LO through the central control module to give a signal to the radio frequency detection device DUT, and the signal is extracted by the first signal extraction module DC1 after being transmitted out of the local oscillator and is input into the switching module SW3.

[0028] Step S2, when the signal enters the radio frequency detection device, a standing wave is generated, the first standing wave signal extraction module C1 measures the standing wave signal size of the radio frequency detection device DUT input end, and inputs into the switching module SW3;

[0029] Step S3, the signal generated by the local oscillator is extracted by the second signal extraction module DC2 after being transmitted out of the radio frequency detection device DUT, and is input into the switching module SW3;

[0030] Step S4, the standing wave generated after the signal enters the radio frequency detection device DUT is measured by the second standing wave signal extraction module C2, and is input into the switching module SW3;

[0031] Step S5, the switching module SW3 inputs the signals into the control module one by one through switching, compares the signal power extracted by the first signal extraction module DC1 with the signal power extracted by the second signal extraction module DC2, if it is not the set value, it indicates that the radio frequency detection device DUT has a problem, avoids the one-by-one checking of the radio frequency detection device and the antenna base station, improves the performance detection efficiency of the antenna base station; at the same time, through the first standing wave signal extraction module C1 and the second standing wave signal extraction module C2, the input and output signals of the radio frequency detection device can be detected more accurately, thereby improving the channel detection accuracy of the radio frequency detection device.

[0032] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiment, any technical scheme falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application should be regarded as the protection scope of the present application.

Claims

1. A channel self-testing system for a radio frequency detection device, characterized in that, include: The system comprises a local oscillator (LO), a first signal extraction module (DC1), a second signal extraction module (DC2), a first programmable switch (SW1), a second programmable switch (SW2), a load (T1), an analog-to-digital converter (ADC), a switching module (SW3), and a central control module. The central control module is connected to the LO, SW1, SW2, and ADC. The LO is located at the signal input terminal of the radio frequency detection device (DUT). The first signal extraction module (DC1) is located between the LO and the SW1, and is connected to the switching module (SW3). The load is located at the signal output terminal of the DUT. The second signal extraction module (DC2) is located between the load (T1) and the second programmable switch (SW2), and is connected to the switching module (SW3). The switching module (SW3) is connected to the ADC.

2. The channel self-test system for a radio frequency detection device according to claim 1, characterized in that, The input terminal of the first programmable switch SW1 is electrically connected to the input terminal of the radio frequency testing device DUT, and the input terminal of the second programmable switch SW2 is electrically connected to the output terminal of the device testing device DUT.

3. The channel self-test system for a radio frequency detection device according to claim 1, characterized in that, Both the first signal extraction module DC1 and the second signal extraction module DC2 are couplers.

4. The channel self-test system for a radio frequency detection device according to claim 3, characterized in that, The isolation terminal of the first signal extraction module DC1 is connected to the switching module SW3.

5. The channel self-test system of a radio frequency detection device according to claim 4, characterized in that, It also includes a first standing wave signal extraction module C1, with port 1 of the first standing wave signal extraction module C1 connected to the first signal extraction module DC1, port 2 of the first standing wave signal extraction module C1 connected to the output terminal of the first programmable switch SW1, and port 3 of the first standing wave signal extraction module C1 connected to the switching module SW3.

6. The channel self-test system of a radio frequency detection device according to claim 5, characterized in that, The first standing wave signal extraction module C1 is a circulator.

7. The channel self-test system of a radio frequency detection device according to claim 3, characterized in that, The isolation terminal of the second signal extraction module DC2 is connected to the switching module SW3.

8. The channel self-test system of a radio frequency detection device according to claim 7, characterized in that, It also includes a second standing wave signal extraction module C2, with port 1 of the second standing wave signal extraction module C2 connected to the second signal extraction module DC2, port 2 of the second standing wave signal extraction module C2 connected to the load T1, and port 3 of the second standing wave signal extraction module C2 connected to the switching module SW3.

9. The channel self-test system of a radio frequency detection device according to claim 8, characterized in that, The second standing wave signal extraction module C2 is a circulator.

10. A self-testing method for a channel self-testing system of a radio frequency detection device according to any one of claims 1-9, characterized in that, Specifically, the steps include the following: Step S1: When the antenna base station uses the radio frequency detection equipment DUT to perform performance testing and data abnormality occurs, the operator starts the local oscillator LO through the central control module to give the radio frequency detection equipment a signal. After the signal is transmitted out of the local oscillator, it is first extracted by the first signal extraction module DC1 and input into the switching module SW3. Step S2: When the signal enters the radio frequency detection device DUT, a standing wave will be generated. The magnitude of the standing wave signal at the input terminal of the radio frequency detection device DUT is measured by the first standing wave signal extraction module C1 and input to the switching module SW3. Step S3: After the signal generated by the local oscillator is transmitted from the radio frequency detection device DUT, it will be extracted by the second signal extraction module DC2 and input into the switching module SW3; Step S4: The standing wave generated after the signal enters the radio frequency detection device DUT is measured by the second standing wave signal extraction module C2 and input to the switching module SW3; Step S5: Switching module SW3 inputs signals into the control module one by one through switching. It compares the signal power extracted by the first signal extraction module DC1 with the signal power extracted by the second signal extraction module DC2. If the signal power is not the set value, there is a problem with the radio frequency detection device.

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