CN110501681B - Doppler radar chip verification method and device - Google Patents
Doppler radar chip verification method and device Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
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Abstract
The invention provides a Doppler radar chip verification method and device, which solve the technical problems of high verification cost, low efficiency, poor test system portability and low reusability of test cases in the conventional Doppler radar chip verification process. The device is provided with a test machine table, a moving target, a radio frequency antenna, a radio frequency switch and a control circuit, wherein the control circuit is electrically connected with the radio frequency switch, the control circuit is electrically connected with the test machine table, and the radio frequency switch is electrically connected with the radio frequency antenna. The invention can be widely applied to the detection of the chip.
Description
Technical Field
The present invention relates to a chip verification method and device, and in particular, to a doppler radar chip verification method and device.
Background
The Doppler radar chip is a microwave signal processing integrated circuit designed by using Doppler frequency shift as a basic principle and adopting the concept of the integrated circuit, is often matched with various radio frequency antennas for use to form a Doppler radar module, can quickly respond to a moving target, is widely applied to the fields of intelligent illumination, security detection, automatic driving, intelligent home and the like, and provides higher requirements for the quality of the Doppler radar chip along with the complication of an application scene.
The higher requirements on the quality of the doppler radar chip make the verification of the chip function more important and the verification covers the entire working state of the chip. Therefore, the design and verification of the doppler radar chip face higher challenges, the traditional verification method is difficult to meet the requirement of high-efficiency verification of a large-scale chip, and how to ensure completeness, efficiency and accuracy of verification and general applicability of a verification system is the biggest problem facing the verification of the current doppler radar chip.
In the verification process, the equipment for simulating the moving target is of a mechanical structure, the state of the equipment cannot be changed within millisecond level, the equipment can only verify the response of the radar chip detecting the moving target, in order to ensure the completeness of the test, the same chip needs to be taken and placed for many times, the measurement is respectively carried out under different conditions, in the process, the chip taking and placing occupies most time of the whole test process, the actual measurement time is extremely short, and the verification cost is high and the efficiency is low.
In addition, the portability of the current test system is poor, the reusability of test cases is low, and developers need to design different test systems aiming at different chips and test machines, so that a great deal of time and energy are wasted.
Disclosure of Invention
The invention provides a Doppler radar chip verification method and device with low verification cost, high efficiency and high general applicability, aiming at the technical problems of high verification cost, low efficiency, poor test system transportability and low test case reusability in the existing Doppler radar chip verification process.
Therefore, the technical scheme of the invention is that the Doppler radar chip verification device is provided with a test machine table, a moving target, a radio frequency antenna, a radio frequency switch and a control circuit, wherein the control circuit is electrically connected with the radio frequency switch, the control circuit is electrically connected with the test machine table, and the radio frequency switch is electrically connected with the radio frequency antenna.
Preferably, the moving object is a fan, and the fan has a fixed rotation speed.
Preferably, the radio frequency antenna comprises a transmitting antenna A, a transmitting antenna C and a receiving antenna B, the transmitting antenna C and the receiving antenna B are located on a plane where the chip is located on the testing machine, the transmitting antenna C and the receiving antenna B face the fan, the transmitting antenna A is located between the plane where the fan is located and the plane where the chip is located, the transmitting antenna A faces the chip, the receiving antenna B is connected with the chip, the transmitting antenna A is connected with the radio frequency switch, the transmitting antenna C is connected with the radio frequency switch, and the radio frequency switch is connected with the chip.
Preferably, the receiving antenna B is connected with the receiving pin of the chip through a coaxial line, the transmitting antenna A is connected with the radio frequency switch and then connected with the transmitting pin of the chip, and the transmitting antenna C is connected with the radio frequency switch and then connected with the transmitting pin of the chip.
Preferably, the plane of the chip is provided with an electromagnetic absorption material.
A Doppler radar chip verification method comprises the following steps:
step S1: measuring an output pin of the chip without the work of a transmitting antenna, judging whether the radar chip can normally respond under the condition of no reflected signal, if so, executing the step S2, and if not, sending a chip abnormal handling signal;
step S2: controlling the transmitting antenna A to work, measuring an output pin of a chip, judging whether the radar chip can normally respond when a reflected signal exists but no moving target exists, if so, executing the step S3, and if not, sending a chip abnormal handling signal;
and step S3: and controlling the transmitting antenna C to work, measuring the output pin of the chip, judging whether the radar chip can normally respond to the moving target, if so, sending a normal processing signal of the chip, returning to the step S1, continuously testing the next chip, and if not, sending an abnormal processing signal of the chip.
Preferably, the transmitting antenna A controls the working state through a radio frequency switch, the transmitting antenna C controls the working state through the radio frequency switch, the control circuit controls the action of the radio frequency switch, the control circuit controls the working state of the chip, the control circuit controls the sampling action of the testing machine, and the testing machine adopts a probe for sampling.
Preferably, the verification method of the doppler radar chip comprises the following specific steps:
(1) After the chip is placed at the corresponding position by the test machine, a signal is sent to the control circuit, the control circuit acquires a chip placement completion signal, the transmitting antenna A and the transmitting antenna C are controlled to be in an out-of-operation state through the radio frequency switch, and the control circuit controls the chip to start working;
(2) The control circuit transmits a sampling start signal to the test machine, the test machine samples an output pin of the Doppler radar chip by using a probe after receiving the signal, and a sampling result is transmitted to the control circuit after sampling is finished;
(3) After receiving the sampling result, the control circuit compares the sampling result with a preset normal range and stores the data in the control circuit, if the chip output data is within the preset normal range, the next step is continued, otherwise, the chip is abnormal, the control circuit transmits an instruction for correctly handling the current chip and preparing to test the next chip to the test machine, and the step (1) is returned;
(4) The control circuit controls the transmitting antenna A to be in a working state and the transmitting antenna C to be in a non-working state through the radio frequency switch, and transmits a sampling starting instruction to the test machine;
(5) Repeating the steps (2) and (3);
(6) The control circuit controls the transmitting antenna C to be in a working state through the radio frequency switch, the transmitting antenna A is in a non-working state, and the control circuit transmits a sampling starting instruction to the test machine;
(7) Executing the step (2);
(8) After receiving the sampling result, the control circuit compares the sampling result with a preset normal range, stores the data in the control circuit, judges that the chip is qualified if the chip output data is within the preset normal range, transmits a chip qualified signal and a signal for preparing the next chip to a test machine by the control circuit, and returns to the step (1); and (4) if the output data exceeds the preset normal range, the control circuit transmits a signal for correctly processing the current chip and preparing the next chip to the test machine, and the step (1) is returned.
Preferably, the range of the preset normal value is obtained by simulation measurement according to the equipment parameters and the relative placement position during actual measurement, and the result of each actual measurement is retained in the control circuit and used for reasonably correcting the range of the preset normal value.
The invention has the following beneficial effects:
(1) The invention simulates the response of the Doppler radar chip under three states of no reflection signal, reflection signal but no moving target, reflection signal and moving target by switching the working states of a plurality of transmitting antennas, completely verifies the quality of the chip in a short time, automatically completes the whole testing process by a control circuit, and has extremely short response time when a radio frequency switch is used for changing the working state of the radio frequency antenna, thereby greatly improving the efficiency of the verifying process;
(2) The control circuit can store test data, and reasonably revises the preset normal range by using a large amount of test data, so that the reliability of the verification result can be ensured;
(3) The Doppler radar test system can be suitable for various Doppler radar chips and test machines by changing the relative placement positions of the radio frequency antenna, the control circuit and each device, and has universal applicability;
(4) A fan with a fixed rotating speed is taken as a moving target, so that a stable approximate sine output signal can be obtained, and a judgment result is facilitated;
(5) The transmitting antenna A and the transmitting antenna C are both provided with specific gain and direction angles, the plane where the chip is located is provided with an electromagnetic absorption material, the electromagnetic waves are prevented from being reflected for multiple times, and the state of detecting a static target is simulated by using the unreflected electromagnetic waves, so that the accuracy of a test result is improved.
Drawings
FIG. 1 is a schematic diagram of the relative placement of various devices in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a general flow chart of a Doppler radar chip verification method according to an embodiment of the invention;
FIG. 3 is a diagram of the main devices and corresponding logic relationships included in the overall test system according to an embodiment of the present invention;
fig. 4 is a complete flow chart of the verification method of the doppler radar chip in the embodiment of the present invention.
The symbols in the drawings illustrate that:
1. a transmitting antenna A;2. a receiving antenna B;3. a transmitting antenna C;4. a fan; 5. testing the machine table; 6. a control circuit; 7. a Doppler radar chip; 8. and a radio frequency switch.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1 and 3, a doppler radar chip verification device is provided with a test machine table 5, a moving target, a radio frequency antenna, a radio frequency switch 8, and a control circuit 6, wherein the radio frequency antenna includes a transmitting antenna A1, a transmitting antenna C3, and a receiving antenna B2, the moving target is a fan 4 with a fixed rotating speed, and the fan 4 with the fixed rotating speed is used as the moving target, so that a stable approximate sine output signal can be obtained, and a judgment result can be conveniently obtained. Transmitting antenna C3 and receiving antenna B2 are located on the plane where Doppler radar chip 7 is located on testing machine 5, transmitting antenna C3 and receiving antenna B2 face fan 4, transmitting antenna A1 is located between the plane where fan 4 is located and the plane where Doppler radar chip 7 is located, transmitting antenna A1 faces Doppler radar chip 7, receiving antenna B2 is connected with the receiving pin of Doppler radar chip 7 through a coaxial line, and transmitting antenna A1 and transmitting antenna C3 are connected with radio frequency switch 8 and then connected with the transmitting pin of Doppler radar chip.
The control circuit 6 is electrically connected with the radio frequency switch 8, the control circuit 6 is electrically connected with the testing machine table 5, the radio frequency switch 8 is electrically connected with the radio frequency antenna, the transmitting antenna A1 and the transmitting antenna C are both provided with specific gain and a specific direction angle, the gain is determined according to the distance from the plane of the testing machine table to the fan, and the direction angle is determined according to the area of the plane of the testing machine table so as to cover the plane of the machine table. The plane of the Doppler radar chip 7 is provided with an electromagnetic absorption material to prevent electromagnetic waves from being reflected for multiple times, and the state of a static target is simulated and detected by using the unreflected electromagnetic waves so as to improve the accuracy of a test result.
As shown in fig. 2, a doppler radar chip verification method includes the basic steps of:
step S1: measuring the output pin of the chip without the work of the transmitting antenna, judging whether the Doppler radar chip 7 can normally respond under the condition that no reflected signal exists, if so, executing the step S2, and if not, sending a chip abnormal handling signal;
step S2: controlling the transmitting antenna A1 to work, measuring the output pin of the chip, judging whether the Doppler radar chip 7 can normally respond when a reflected signal exists but no moving target exists, if so, executing the step S3, and if not, sending a chip abnormal handling signal;
and step S3: and controlling the transmitting antenna C3 to work, measuring the output pin of the chip, judging whether the Doppler radar chip 7 can make normal response to the moving target, if so, sending a normal processing signal of the chip, returning to the step S1, continuing to test the next chip, and if not, sending an abnormal handling signal of the chip.
The transmitting antenna A1 and the transmitting antenna C3 are both controlled to be in a working state through the radio frequency switch 8, the control circuit 6 controls the radio frequency switch 8 to act, the control circuit 6 controls the working state of the Doppler radar chip 7, the control circuit 6 controls the sampling action of the testing machine table 5, and the testing machine table 5 adopts a probe for sampling.
As shown in fig. 4, the specific steps of the doppler radar chip verification method are as follows:
(1) After the chip is placed at the corresponding position by the test machine table 5, a signal is sent to the control circuit 6, the control circuit 6 obtains a chip placement completion signal, the transmitting antenna A1 and the transmitting antenna C3 are controlled to be in a non-working state through the radio frequency switch 8, and the control circuit 6 controls the chip to start working;
(2) The control circuit 6 transmits a sampling start signal to the test machine table 5, the test machine table 5 samples an output pin of the Doppler radar chip 7 by using a probe after receiving the signal, and a sampling result is transmitted to the control circuit 6 after the sampling is finished;
(3) After receiving the sampling result, the control circuit 6 compares the sampling result with a preset normal range, stores the data in the control circuit 6, continues the next step if the chip output data is within the preset normal range, otherwise, if the chip is abnormal, the control circuit 6 transmits an instruction for correctly handling the current chip and preparing to test the next chip to the test machine table 5, and returns to the step (1);
(4) The control circuit 6 controls the transmitting antenna A1 to be in a working state and the transmitting antenna C3 to be in a non-working state through the radio frequency switch 8, and transmits a sampling starting instruction to the testing machine table 5;
(5) Repeating the steps (2) and (3);
(6) The control circuit 6 controls the transmitting antenna C3 to be in a working state and the transmitting antenna A1 to be in a non-working state through the radio frequency switch 8, and the control circuit 6 transmits a sampling starting instruction to the testing machine table 5;
(7) Executing the step (2);
(8) After receiving the sampling result, the control circuit 6 compares the sampling result with a preset normal range, stores the data in the control circuit 6, judges that the chip is qualified if the chip output data is within the preset normal range, transmits a chip qualified signal and a signal for preparing the next chip to the test machine table 5 by the control circuit 6, and repeats the step (1); if the output data exceeds the preset normal range, the control circuit 6 transmits a signal for correctly processing the current chip and preparing the next chip to the test machine 5, and the step (1) is repeated.
In this embodiment, the control circuit 6 and the test machine 5 together complete the control of other devices to realize the whole test process:
(1) The control circuit 6 and the test machine table 5 mutually transmit instructions and data information, the test machine table 5 provides chip placement completion signals and chip output sampling results for the control circuit 6, the control circuit 6 provides instructions for starting sampling, correctly processing a current chip and starting to place a next chip for the test machine table 5, the test machine table 5 places the chip and samples the chip output results, and the chip is processed according to the instructions of the control circuit 6;
(2) The receiving antenna B2 is connected with a receiving pin of the chip through a coaxial line, the transmitting antenna A1 and the transmitting antenna C3 are connected with the radio frequency switch 8 and then connected with a transmitting pin of the chip, and the control circuit 6 controls the working states of the transmitting antenna A1 and the transmitting antenna C3 by controlling the radio frequency switch 8.
The range of the preset normal value is firstly simulated by a tester to obtain a test environment, a sufficient number of normal chips are used for measurement, a large amount of measurement data are obtained along with the progress of the test process, and the data are reserved in the control circuit and used for correcting the range of the preset normal value, so that the accuracy of the test result is improved, and the reliability of the verification result is fully ensured.
The invention simulates the response of the Doppler radar chip under three states of no reflection signal, reflection signal but no moving target, reflection signal and moving target by switching the working states of a plurality of transmitting antennas, completely verifies the quality of the chip in a short time, automatically completes the whole testing process by a control circuit, and has extremely short response time when a radio frequency switch is used for changing the working state of the radio frequency antenna, thereby greatly improving the efficiency of the verifying process; the invention can be suitable for various Doppler radar chips and test machines by changing the relative placement positions of the radio frequency antenna, the control circuit and each device, has universal applicability and greatly reduces the verification cost.
However, the above description is only an example of the present invention, and the scope of the present invention should not be limited thereto, so that the substitution of the equivalent elements, or the equivalent changes and modifications made according to the claims should be included in the scope of the present invention.
Claims (7)
1. A Doppler radar chip verification method comprises the following steps:
step S1: measuring an output pin of the chip without the work of a transmitting antenna, judging whether the radar chip can normally respond under the condition of no reflected signal, if so, executing the step S2, and if not, sending a chip abnormal handling signal;
step S2: controlling the transmitting antenna A to work, measuring an output pin of a chip, judging whether the radar chip can normally respond when a reflected signal exists but no moving target exists, if so, executing the step S3, and if not, sending a chip abnormal handling signal;
and step S3: controlling the transmitting antenna C to work, measuring the output pin of the chip, judging whether the radar chip can make normal response to the moving target, if so, sending a chip normal processing signal, returning to the step S1, continuing to test the next chip, and if not, sending a chip abnormal handling signal; the transmitting antenna A controls the working state through a radio frequency switch, the transmitting antenna C controls the working state through the radio frequency switch, the control circuit controls the action of the radio frequency switch, the control circuit controls the working state of the chip, the control circuit controls the sampling action of the testing machine, and the testing machine adopts a probe for sampling;
the Doppler radar chip verification method specifically comprises the following steps:
(1) After the chip is placed at a corresponding position by the test machine, sending a signal to the control circuit, acquiring a chip placement completion signal by the control circuit, controlling the transmitting antenna A and the transmitting antenna C to be in a non-working state through the radio frequency switch, and controlling the chip to start working by the control circuit;
(2) The control circuit transmits a sampling start signal to the test machine, the test machine samples an output pin of the Doppler radar chip by using a probe after receiving the signal, and a sampling result is transmitted to the control circuit after sampling is finished;
(3) After receiving the sampling result, the control circuit compares the sampling result with a preset normal range, stores the data in the control circuit, continues to the next step if the chip output data is within the preset normal range, otherwise, the chip is abnormal, and transmits an instruction for correctly handling the current chip and preparing to test the next chip to the test machine, and returns to the step (1);
(4) The control circuit controls the transmitting antenna A to be in a working state and the transmitting antenna C to be in a non-working state through the radio frequency switch, and transmits a sampling starting instruction to the testing machine;
(5) Repeating the steps (2) and (3);
(6) The control circuit controls the transmitting antenna C to be in a working state through the radio frequency switch, the transmitting antenna A is in a non-working state, and the control circuit transmits a sampling starting instruction to the test machine;
(7) Executing the step (2);
(8) After receiving the sampling result, the control circuit compares the sampling result with a preset normal range, stores the data in the control circuit, judges that the chip is qualified if the chip output data is within the preset normal range, transmits a chip qualified signal and a signal for preparing the next chip to a test machine by the control circuit, and returns to the step (1); and (4) if the output data exceeds the preset normal range, the control circuit transmits a signal for correctly processing the current chip and preparing the next chip to the test machine, and the step (1) is returned.
2. The doppler radar chip verification method according to claim 1, wherein the predetermined normal range is obtained by simulation measurement according to the device parameters and the relative placement position at the time of actual measurement, and the result of each actual measurement is retained in the control circuit for reasonably correcting the range of the predetermined normal value.
3. A Doppler radar chip verification device applied to the method of claim 2 is provided with a test machine platform and a moving target, and is characterized by further comprising a radio frequency antenna, a radio frequency switch and a control circuit, wherein the control circuit is electrically connected with the radio frequency switch, the control circuit is electrically connected with the test machine platform, and the radio frequency switch is electrically connected with the radio frequency antenna.
4. The doppler radar chip authentication device according to claim 3, wherein the moving object is a fan, and the fan has a fixed rotation speed.
5. The Doppler radar chip verification device according to claim 4, wherein the radio frequency antenna comprises a transmitting antenna A, a transmitting antenna C and a receiving antenna B, the transmitting antenna C and the receiving antenna B are located on a plane where a chip is located on the test machine, the transmitting antenna C and the receiving antenna B face the fan, the transmitting antenna A is located between the plane where the fan is located and the plane where the chip is located, the transmitting antenna A faces the chip, the receiving antenna B is connected to the chip, the transmitting antenna A is connected to the radio frequency switch, the transmitting antenna C is connected to the radio frequency switch, and the radio frequency switch is connected to the chip.
6. The Doppler radar chip verification device according to claim 5, wherein the receiving antenna B is connected to the receiving pin of the chip through a coaxial line, the transmitting antenna A is connected to the RF switch and then connected to the transmitting pin of the chip, and the transmitting antenna C is connected to the RF switch and then connected to the transmitting pin of the chip.
7. The Doppler radar chip verification device according to claim 6, wherein the chip is provided with an electromagnetic absorption material on a plane.
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| CN110888041A (en) * | 2019-12-09 | 2020-03-17 | 北京富奥星电子技术有限公司 | Doppler radar chip verification method and device |
| CN113917460A (en) * | 2021-09-30 | 2022-01-11 | 广州极飞科技股份有限公司 | Radar imaging equipment and terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015081498A1 (en) * | 2013-12-03 | 2015-06-11 | 南充鑫源通讯技术有限公司 | Microwave induction control method and apparatus |
| CN108919210A (en) * | 2018-07-12 | 2018-11-30 | 中国船舶重工集团公司第七二四研究所 | A kind of one-dimensional phase sweeps three-dimensional radar intermediate frequency target simulator |
| CN109444833A (en) * | 2018-10-19 | 2019-03-08 | 陕西长岭电子科技有限责任公司 | Contactless Doppler radar analogue system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015081498A1 (en) * | 2013-12-03 | 2015-06-11 | 南充鑫源通讯技术有限公司 | Microwave induction control method and apparatus |
| CN108919210A (en) * | 2018-07-12 | 2018-11-30 | 中国船舶重工集团公司第七二四研究所 | A kind of one-dimensional phase sweeps three-dimensional radar intermediate frequency target simulator |
| CN109444833A (en) * | 2018-10-19 | 2019-03-08 | 陕西长岭电子科技有限责任公司 | Contactless Doppler radar analogue system |
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