A direction locator

Abstract

The present invention provides a direction locator, including a host, and antennas installed at the four corners of the host, the antennas including a first antenna, a second antenna, a third antenna, and a fourth antenna, an MCU and a radio frequency chip are installed in the host, the MCU is connected to the radio frequency chip, and the radio frequency chip is respectively connected to the first antenna, the second antenna, the third antenna, and the fourth antenna; the signal-to-noise ratio value of each antenna is calculated by the MCU and the radio frequency chip; the direction of the slave is determined by comparing the signal-to-noise ratio value of each antenna. The beneficial effects of the present invention are: the direction locator of the present invention can achieve efficient and high-accuracy direction positioning, and can greatly reduce the error range.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a direction locator. Background Art

[0002] In the existing direction positioning technology, the direction position of the extension is positioned by the host. However, the existing technology is inaccurate and has a large error range, which cannot meet the user's requirements. Summary of the invention

[0003] The present invention provides a direction locator, comprising a host, and antennas installed at four corners of the host, the antennas comprising a first antenna, a second antenna, a third antenna, and a fourth antenna, an MCU and a radio frequency chip are installed in the host, the MCU is connected to the radio frequency chip, and the radio frequency chip is respectively connected to the first antenna, the second antenna, the third antenna, and the fourth antenna;

[0004] The signal-to-noise ratio value of each antenna is calculated through the MCU and RF chip;

[0005] The direction of the slave is determined by comparing the signal-to-noise ratio values ​​of each antenna.

[0006] As a further improvement of the present invention, the average signal level is measured at each antenna by a radio frequency chip, and then the standard deviation of the noise power is measured, and then the signal-to-noise ratio value of each antenna is calculated using a formula.

[0007] As a further improvement of the present invention, the MCU outputs a crystal oscillator connected to the RF chip through a PWM duty cycle to perform tunable calibration of the crystal oscillator frequency. The RF chip also feeds back the frequency of the crystal oscillator input to the crystal oscillator pin of the MCU.

[0008] As a further improvement of the present invention, the gain signal detected by the RF chip from the antenna during operation is fed back to the MCU in two parts;

[0009] The first part of the action: The RF chip outputs a level signal to the filter chip through the signal synchronization output pin. After internal processing, the filter chip outputs the digital signal level to the pin with comparison function of the MCU. The MCU determines the level of the filter chip output through differential level comparison, and inputs the comparison result level back to the common IO pin of the MCU to determine the high and low levels and measure the average signal level.

[0010] The second part of the action: After internal processing, the RF chip provides a communication time slot to feed back the value of the noise power standard deviation of the gain signal to the MCU. The MCU receives data according to the communication time slot, and then processes the average signal level and the noise power standard deviation through a software algorithm to obtain the signal-to-noise ratio value.

[0011] As a further improvement of the present invention, the first antenna is located at the left front of the host, the second antenna is located at the right front of the host, the third antenna is located at the left rear of the host, and the fourth antenna is located at the right rear of the host.

[0012] As a further improvement of the present invention, when the signal-to-noise ratio values ​​of the first antenna and the second antenna of the host are equal and the strength values ​​are greater than those of the third antenna and the fourth antenna, it is judged that the extension is in front of the center; when the signal-to-noise ratio values ​​of the third antenna and the fourth antenna of the host are equal and the strength values ​​are greater than those of the first antenna and the second antenna, it is judged that the extension is behind the center;

[0013] When the signal-to-noise ratio values ​​of the first antenna and the third antenna of the host are equal and the strength values ​​are greater than the second antenna and the fourth antenna, it is judged that the extension is on the left side of the center; when the signal-to-noise ratio values ​​of the second antenna and the fourth antenna of the host are equal and the strength values ​​are greater than the first antenna and the third antenna, it is judged that the extension is on the right side of the center;

[0014] When the signal-to-noise ratio value of the first antenna is the largest and the signal-to-noise ratio value of the fourth antenna is the smallest, it is determined that the extension is in the left front, and the left front deviation is further determined by comparing the signal-to-noise ratio value of the second antenna with the signal-to-noise ratio value of the third antenna;

[0015] When the signal-to-noise ratio value of the third antenna is the largest and the signal-to-noise ratio value of the second antenna is the smallest, it is determined that the extension is at the left rear, and the left rear deviation is further determined by comparing the signal-to-noise ratio value of the first antenna with the signal-to-noise ratio value of the fourth antenna;

[0016] When the signal-to-noise ratio value of the second antenna is the largest and the signal-to-noise ratio value of the third antenna is the smallest, it is determined that the extension is in the right front, and the right front deviation is further determined by comparing the signal-to-noise ratio value of the first antenna with the signal-to-noise ratio value of the fourth antenna;

[0017] When the signal-to-noise ratio value of the fourth antenna is the largest and the signal-to-noise ratio value of the first antenna is the smallest, it is determined that the extension is at the right rear, and the right rear deviation is further determined by comparing the signal-to-noise ratio value of the second antenna with the signal-to-noise ratio value of the third antenna.

[0018] The beneficial effects of the present invention are as follows: the direction locator of the present invention can realize efficient and high-accuracy direction positioning and can greatly reduce the error range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a principle block diagram of the present invention. DETAILED DESCRIPTION

[0020] like Figure 1As shown, the present invention discloses a direction locator, including a host, and antennas installed on four corners of the host, the antennas including a first antenna T1, a second antenna T2, a third antenna T3, and a fourth antenna T4, an MCU and a radio frequency chip are installed in the host, the MCU is connected to the radio frequency chip, and the radio frequency chip is respectively connected to the first antenna T1, the second antenna T2, the third antenna T3, and the fourth antenna T4; the signal-to-noise ratio value of each antenna is calculated by the MCU and the radio frequency chip; the direction of the slave is determined by comparing the signal-to-noise ratio value of each antenna.

[0021] In order to solve the problems of inaccurate positioning and large error range in the prior art, the inventors conducted repeated research and experiments and finally obtained a relatively perfect technical solution, that is, firstly, the signal-to-noise ratio value of each antenna is obtained by calculation, and then the direction of the slave machine is determined by comparing the signal-to-noise ratio value of each antenna. This technical solution makes positioning more accurate and greatly reduces the error range, which fully reflects the inventor's technical contribution and deserves recognition and protection.

[0022] The average signal level is measured at each antenna through the RF chip, and then the standard deviation of the noise power is measured. The signal-to-noise ratio value of each antenna is calculated using the formula, which is:

[0023] 1. The average signal level can be measured at the first antenna T1 through the RF chip, and then the standard deviation of the noise power can be measured, and then the first signal-to-noise ratio value can be calculated using the formula.

[0024] 2. The average signal level can be measured by the RF chip at the second antenna T2, and then the standard deviation of the noise power can be measured, and then the second signal-to-noise ratio value can be calculated using the formula.

[0025] 3. At the third antenna T3, the average signal level can be measured through the RF chip, and then the standard deviation of the noise power can be measured, and then the third signal-to-noise ratio value can be calculated using the formula.

[0026] 4. At the fourth antenna T4, the average signal level can be measured by the radio frequency chip, and then the standard deviation of the noise power can be measured, and then the fourth signal-to-noise ratio value can be calculated using the formula.

[0027] Improving positioning accuracy alone is not enough to satisfy the inventor. Further improving positioning speed is the direction of the inventor's research and development. In order to improve positioning speed, the inventor proposed the following solution, that is, the technical solution for measuring the average signal level and noise power of each antenna is as follows: MCU connects the crystal oscillator of the RF chip through PWM duty cycle output to tunable calibrate the crystal oscillator frequency. The RF chip will also feed back the frequency of the crystal oscillator input to the crystal oscillator pin of the MCU to achieve the same crystal oscillator frequency clock for the two chips. The synchronized crystal oscillator is the clock that can reduce the data error caused by the different clock frequencies. When the RF chip is working, the gain signal detected from the antenna will be fed back to the MCU in two parts. 1. The RF chip outputs the level signal to the filter chip through the signal synchronization output pin. After internal processing, the filter chip outputs the digital signal level to the pin with comparison function of the MCU. The MCU judges the level of the filter chip output through differential level comparison, and inputs the comparison result level back to the ordinary IO pin of the MCU for high and low level judgment to measure the average signal level. 2. After the RF chip is processed internally, it provides a communication time slot to feed back the value of the noise power standard deviation of the gain signal to the MCU, and the MCU receives data according to the communication time slot. Then the average signal level and the noise power standard deviation are processed by the software algorithm to obtain the signal-to-noise ratio value.

[0028] In summary, the present invention not only has high positioning accuracy but also has faster positioning speed. It is a high-quality direction locator that meets the needs of users and is worthy of popularization and application.

[0029] When the first antenna T1 is located in the left front of the host, the second antenna T2 is located in the right front of the host, the third antenna T3 is located in the left rear of the host, and the fourth antenna T4 is located in the right rear of the host, the technical solution for judging the position of the slave by comparing the signal-to-noise ratio value of each antenna is: when the signal-to-noise ratio values ​​of the first antenna T1 and the second antenna T2 of the host are equal and the strength values ​​are greater than those of the third antenna T3 and the fourth antenna T4, it is judged that the slave is in the front of the center; when the signal-to-noise ratio values ​​of the third antenna T3 and the fourth antenna T4 of the host are equal and the strength values ​​are greater than those of the first antenna T1 and the second antenna T2, it is judged that the slave is in the rear of the center;

[0030] When the signal-to-noise ratio values ​​of the first antenna T1 and the third antenna T3 of the host are equal and the strength values ​​are greater than the second antenna T2 and the fourth antenna T4, it is judged that the extension is on the left side of the center; when the signal-to-noise ratio values ​​of the second antenna T2 and the fourth antenna T4 of the host are equal and the strength values ​​are greater than the first antenna T1 and the third antenna T3, it is judged that the extension is on the right side of the center;

[0031] When the signal-to-noise ratio value of the first antenna T1 is the largest and the signal-to-noise ratio value of the fourth antenna T4 is the smallest, it is determined that the extension is in the left front, and the left front deviation is further determined by comparing the signal-to-noise ratio value of the second antenna T2 with the signal-to-noise ratio value of the third antenna T3;

[0032] When the signal-to-noise ratio value of the third antenna T3 is the largest and the signal-to-noise ratio value of the second antenna T2 is the smallest, it is determined that the extension is at the left rear, and the left rear deviation is further determined by comparing the signal-to-noise ratio value of the first antenna T1 with the signal-to-noise ratio value of the fourth antenna T4;

[0033] When the signal-to-noise ratio value of the second antenna T2 is the largest and the signal-to-noise ratio value of the third antenna T3 is the smallest, it is determined that the extension is in the right front, and the right front deviation is further determined by comparing the signal-to-noise ratio value of the first antenna T1 with the signal-to-noise ratio value of the fourth antenna T4;

[0034] When the signal-to-noise ratio value of the fourth antenna T4 is the largest and the signal-to-noise ratio value of the first antenna T1 is the smallest, it is determined that the extension is at the right rear, and the right rear deviation is further determined by comparing the signal-to-noise ratio value of the second antenna T2 with the signal-to-noise ratio value of the third antenna T3.

[0035] The direction locator of the present invention can realize efficient and high-accuracy direction positioning and can greatly reduce the error range.

[0036] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A direction locator, characterized in that: The invention comprises a host and antennas installed at four corners of the host, wherein the antennas comprise a first antenna (T1), a second antenna (T2), a third antenna (T3), and a fourth antenna (T4); an MCU and a radio frequency chip are installed in the host, wherein the MCU is connected to the radio frequency chip, and the radio frequency chip is respectively connected to the first antenna (T1), the second antenna (T2), the third antenna (T3), and the fourth antenna (T4); The signal-to-noise ratio value of each antenna is calculated through the MCU and RF chip; The direction of the slave aircraft is determined by comparing the signal-to-noise ratio values ​​of each antenna; The average signal level is measured at each antenna through the RF chip, and then the standard deviation of the noise power is measured. The signal-to-noise ratio value of each antenna is calculated using the formula. The MCU connects to the crystal oscillator of the RF chip through the PWM duty cycle output to perform tunable calibration of the crystal oscillator frequency. The RF chip will also feed back the frequency of the crystal oscillator input to the crystal oscillator pin of the MCU. When the RF chip is working, the gain signal detected from the antenna will be fed back to the MCU in two parts; The first part of the action: The RF chip outputs a level signal to the filter chip through the signal synchronization output pin. After internal processing, the filter chip outputs the digital signal level to the pin with comparison function of the MCU. The MCU determines the level of the filter chip output through differential level comparison, and inputs the comparison result level back to the common IO pin of the MCU to determine the high and low levels and measure the average signal level. The second part of the action: After internal processing, the RF chip provides a communication time slot to feed back the value of the noise power standard deviation of the gain signal to the MCU. The MCU receives data according to the communication time slot, and then processes the average signal level and the noise power standard deviation through a software algorithm to obtain the signal-to-noise ratio value.

2. The direction locator according to claim 1, characterized in that: The first antenna (T1) is located at the left front of the host, the second antenna (T2) is located at the right front of the host, the third antenna (T3) is located at the left rear of the host, and the fourth antenna (T4) is located at the right rear of the host.

3. The direction locator according to claim 2, characterized in that: When the signal-to-noise ratio values ​​of the first antenna (T1) and the second antenna (T2) of the host are equal and the strength values ​​are greater than those of the third antenna (T3) and the fourth antenna (T4), it is determined that the extension is in front of the center; When the signal-to-noise ratio values ​​of the third antenna (T3) and the fourth antenna (T4) of the host are equal and the strength values ​​are greater than the first antenna (T1) and the second antenna (T2), it is determined that the extension is behind the center; When the signal-to-noise ratio values ​​of the first antenna (T1) and the third antenna (T3) of the host are equal and the strength values ​​are greater than the second antenna (T2) and the fourth antenna (T4), it is judged that the extension is located to the left of the center; when the signal-to-noise ratio values ​​of the second antenna (T2) and the fourth antenna (T4) of the host are equal and the strength values ​​are greater than the first antenna (T1) and the third antenna (T3), it is judged that the extension is located to the right of the center; When the signal-to-noise ratio value of the first antenna (T1) is the largest and the signal-to-noise ratio value of the fourth antenna (T4) is the smallest, it is determined that the extension is in the left front, and the left front deviation is further determined by comparing the signal-to-noise ratio value of the second antenna (T2) with the signal-to-noise ratio value of the third antenna (T3); When the signal-to-noise ratio value of the third antenna (T3) is the largest and the signal-to-noise ratio value of the second antenna (T2) is the smallest, it is determined that the extension is at the left rear, and the left rear deviation is further determined by comparing the signal-to-noise ratio value of the first antenna (T1) with the signal-to-noise ratio value of the fourth antenna (T4); When the signal-to-noise ratio value of the second antenna (T2) is the largest and the signal-to-noise ratio value of the third antenna (T3) is the smallest, it is determined that the extension is in the right front, and the right front deviation is further determined by comparing the signal-to-noise ratio value of the first antenna (T1) with the signal-to-noise ratio value of the fourth antenna (T4); When the signal-to-noise ratio value of the fourth antenna (T4) is the largest and the signal-to-noise ratio value of the first antenna (T1) is the smallest, it is determined that the extension is located at the right rear, and the right rear deviation is further determined by comparing the signal-to-noise ratio value of the second antenna (T2) with the signal-to-noise ratio value of the third antenna (T3).

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