CN111624909A - Novel gyroscope sensor data output system and control method thereof - Google Patents
Novel gyroscope sensor data output system and control method thereof Download PDFInfo
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- G—PHYSICS
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Abstract
The invention relates to the field of sensors and discloses a novel data output system and a control method of a gyroscope sensor, which comprises the gyroscope sensor, an 8-bit shift register and a single chip microcomputer, wherein the input end of the 8-bit shift register is electrically connected with a serial output port of the gyroscope sensor, the output end of the 8-bit shift register 74LS164 is in signal connection with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is in signal connection with a lower computer. Compared with the prior art, the gyroscope sensor has the advantages that a parallel output system is added on the basis of the existing serial output data, the data transmission time is reduced, the data are serially input and output through the shift register, the data are secondarily and parallelly output by adopting the singlechip, and the data transmission time in one period is reduced, so that the gyroscope sensor can be qualified for high-precision and quick processing occasions, namely the system comprises serial output and parallel output and is selected by a user according to the use occasions.
Description
Technical Field
The invention relates to the field of sensors, in particular to a novel gyroscope sensor data output system and a data output control method thereof.
Background
The gyroscope sensor can accurately detect signals such as the azimuth, the acceleration, the angular velocity, the inclination angle and the like of a moving object so as to facilitate a driver or an automatic navigator to control the moving object to move according to a set route.
The existing gyroscope sensor adopts serial transmission, the transmission frequency is dozens of to hundreds of hertz, data packets such as acceleration, angular velocity, inclination angle and the like are sent in series in each transmission period, the data bit-wise receiving and processing time consumption is long, and the system is not suitable for high-precision and quick control occasions, so that a novel gyroscope sensor data output system and a novel gyroscope sensor data output method need to be designed, the data output system can be used for serial output and high-speed parallel output, the data transmission speed is improved, the data packet transmission time is reduced, and the defect that the traditional serial transmission occupies a long time in one period is overcome.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a novel data output system of a gyroscope sensor and a control method thereof, aiming at providing a system for converting serial output into parallel output and reducing data transmission time on the basis of the existing serial output data.
The technical scheme is as follows: the invention provides a novel data output system of a gyroscope sensor, which comprises the gyroscope sensor, an 8-bit shift register, a single chip microcomputer and a lower computer, wherein the input end of the 8-bit shift register is electrically connected with a serial output port of the gyroscope sensor, the output end of the 8-bit shift register is in signal connection with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is in signal connection with the lower computer;
the serial output end TX of the gyroscope sensor is in signal connection with a DSA port of the 8-bit shift register and is also in signal connection with a P3.0 port of the singlechip; 8-bit output ports Q0-Q7 of the 8-bit shift register are connected with P1.0-P1.7 ports of the single chip microcomputer through signals; the P3.2 port of the single chip microcomputer periodically outputs a pulse signal CP0, and the output is electrically connected with the CP end of the 8-bit shift register after being inverted; the P3.3 port of the singlechip outputs a pulse trigger signal CP 1; the P0.0-P0.7 port of the single chip microcomputer is in signal connection with the lower computer and outputs the detection value of the gyroscope sensor in parallel.
Further, the model of the 8-bit shift register is 74LS164, and the single chip microcomputer selects STC89C 52.
Further, the gyroscope sensor outputs data in a serial mode 1, a frame of data packet is sent every 10ms, and the content of the data packet comprises an acceleration packet, an angular velocity packet and an angle packet; each packet occupies 11 bytes, including: the data processing system comprises a packet header, a packet identifier, an X-axis data low byte, an X-axis data high byte, a Y-axis data low byte, a Y-axis data high byte, a Z-axis data low byte, a Z-axis data high byte, a temperature low byte, a temperature high byte and a checksum.
A data output control method based on a novel gyroscope sensor data output system comprises the following specific control methods:
s1: a gyroscope sensor TX end outputs data in a serial mode 1, and a singlechip detects a header initial bit sent by the TX end;
s2: a P3.2 pin of the singlechip outputs a trigger signal CP0, an 8-bit shift register receives a CP0 signal, and the signal is triggered at each falling edge of CP0 to shift and register 1-bit data;
s3: the singlechip detects the stop bit of each byte, when the stop bit is detected, the CP0 outputs a high level signal, if the stop bit signal is not detected, the S2 is repeated;
s4: in the CP0 high-level period, the singlechip receives 8-bit data signals received by the 8-bit shift register;
s5: the singlechip detects the start bit of the next byte, repeats S1-S4, and sequentially shifts, registers and outputs each byte of data in 3 data packets to the singlechip;
s6: the single chip microcomputer detects the checksum stop bit of the angle packet, if the information stop bit of the checksum in the angle packet is detected, the serial data receiving in one period is finished, and the port P3.3 of the single chip microcomputer generates 1 falling edge signals CP1 to provide a trigger signal for the lower computer to receive, so that the completeness and the accuracy of the signals received by the lower computer are ensured.
Has the advantages that:
1. on the basis of reserving a serial output port of the gyroscope sensor, serial data is changed into parallel transmission by adopting a shift register, and then the serial data is controlled by a single chip microcomputer to be stored, output in parallel for the second time and send signals in parallel, so that the data transmission time in one period is reduced.
2. The invention adopts the singlechip to provide the falling edge trigger pulse CP1 to provide the trigger signal for the reception of the lower computer, thereby ensuring the completeness and accuracy of the signal received by the lower computer and facilitating the use of users.
3. The period of the synchronous trigger pulse CP0 is 8.68 mu s, and 286 mu s is used when 33 bytes of data are received, so that the gyroscope sensor can be used in high-precision and rapid processing occasions.
4. The invention can also be applied to other serial data transmission fields and has wide applicability.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a timing diagram of the system external parallel output of the present invention;
FIG. 3 is a timing diagram of the system internal timing of the present invention;
FIG. 4 is a control flow diagram of the present invention;
FIG. 5 is a simulation of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
A novel data output system of a gyroscope sensor and a control method thereof aim at providing a system which changes serial output into parallel output and reduces data transmission time on the basis of the existing serial output data.
The invention provides a novel data output system of a gyroscope sensor, which comprises the gyroscope sensor, an 8-bit shift register, a single chip microcomputer and a lower computer, wherein the input end of the 8-bit shift register is electrically connected with a serial output port of the gyroscope sensor, the output end of the 8-bit shift register 74LS164 is in signal connection with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is in signal connection with the lower computer.
In the embodiment, the gyroscope sensor is of a BWT61 model, the 8-bit shift register is of a 74LS164 model, and the single chip microcomputer selects STC89C 52.
And a serial output end TX of the gyroscope sensor is in signal connection with a DSA port of the 8-bit shift register and is also in signal connection with a P3.0 port of the singlechip. 8-bit output ports Q0-Q7 of the 8-bit shift register are connected with P1.0-P1.7 ports of the single chip microcomputer through signals. The P3.2 port of the singlechip periodically outputs a pulse signal CP0, and the output is electrically connected with the CP end of the 8-bit shift register after being inverted. The P3.3 port of the single chip outputs a pulse trigger signal CP 1. The P0.0-P0.7 port of the single chip microcomputer is in signal connection with the lower computer and outputs the detection value of the gyroscope sensor in parallel.
Fig. 2 is a parallel timing diagram of the outside of the system of the present invention, in a transmission cycle, the gyro sensor outputs data in serial mode 1, and sends a frame data packet every 10ms, and serially transmits an acceleration packet, an angular velocity packet, and a velocity packet in sequence, where each data packet contains 11 bytes, and the data packets are respectively: the packet header, the packet identifier (0X 51, 0X52, 0X53 correspond to the identifier of the acceleration packet, the identifier of the angular velocity packet, and the identifier of the angle packet, respectively), the X-axis data low byte, the X-axis data high byte, the Y-axis data low byte, the Y-axis data high byte, the Z-axis data low byte, the Z-axis data high byte, the temperature low byte, the temperature high byte, and the checksum. During the transmission of the data packet, the port P3.4 of the single chip STC89C52 outputs high level, when the stop bit of the transmission end of the data packet is detected, the port P3.3 of the single chip STC89C52 outputs CP1 pulse, the falling edge triggers, a trigger signal is provided for the reception of the lower computer, and the data is transmitted in parallel outside the data output system.
The data output control method of the gyroscope sensor comprises the following steps:
s1: a gyroscope sensor TX end outputs data in a serial mode 1, and a singlechip detects a header initial bit sent by the TX end;
s2: a P3.2 pin of the singlechip outputs a trigger signal CP0, an 8-bit shift register receives a CP0 signal, and the signal is triggered at each falling edge of CP0 to shift and register 1-bit data;
s3: the singlechip detects the stop bit of each byte, when the stop bit is detected, the CP0 outputs a high level signal, if the stop bit signal is not detected, the S2 is repeated;
s4: in the CP0 high-level period, the singlechip receives 8-bit data signals received by the 8-bit shift register;
s5: the singlechip detects the start bit of the next byte, repeats S1-S4, and sequentially shifts, registers and outputs each byte of data in 3 data packets to the singlechip;
s6: the single chip microcomputer detects the checksum stop bit of the angle packet, if the information stop bit of the checksum in the angle packet is detected, the serial data receiving in one period is finished, and the port P3.3 of the single chip microcomputer generates 1 falling edge signals CP1 to provide a trigger signal for the lower computer to receive, so that the completeness and the accuracy of the signals received by the lower computer are ensured.
Fig. 3 is a timing diagram of the system of the present invention, which explains the above steps in detail by taking an angular velocity packet as an example, and the transmitted 11 bytes include: a packet header (0X 55), a packet header identifier (0X 51 is acceleration packet), an X-axis acceleration low byte, an X-axis acceleration high byte, a Y-axis acceleration low byte, a Y-axis acceleration high byte, a Z-axis acceleration low byte, a Z-axis acceleration high byte, a temperature low byte, a temperature high byte, a checksum. Each byte data is transmitted in a serial mode 1, wherein the idle bit in the transmission is 1, the start bit is 0, and the stop bit is 1.
The singlechip STC89C52 detects the start bit of the packet header byte, when the start bit of the packet header byte is detected, a P3.2 port of the singlechip STC89C52 outputs a falling edge trigger pulse CP0 to control the 8-bit shift register 74LS164 to shift the received data, the singlechip STC89C52 detects the stop bit of the packet header byte, when the stop bit of the packet header is detected, the P3.2 port of the singlechip STC89C52 outputs a high-level signal, and simultaneously, the 8-bit shift register 74LS164 transmits the received 8-bit packet header data 0X55 to the singlechip STC89C 52. When the start bit of the header identification byte is detected, the CP0 outputs a falling edge trigger pulse to start receiving 8-bit data of the header identification byte, when the stop bit of the header identification byte is detected, the P3.2 port of the singlechip STC89C52 outputs a high level signal, and simultaneously, the 8-bit shift register 74LS164 transmits the received 8-bit header identification data 0X51 to the singlechip STC89C 52. And sequentially completing transmission of X-axis acceleration low bytes, X-axis acceleration high bytes, Y-axis acceleration low bytes, Y-axis acceleration high bytes, Z-axis acceleration low bytes, Z-axis acceleration high bytes, temperature low bytes, temperature high bytes and check sum data.
FIG. 4 is a control flow chart of the present invention, in which a gyroscope sensor TX outputs data in series, a single chip detects a data start bit, when the start bit is detected, the single chip outputs a falling edge trigger pulse CP0 to control an 8-bit shift register to shift and receive byte data, the single chip detects a byte stop bit, if a stop bit of a current byte is not detected, the 8-bit shift register continues to receive data, when the stop bit is detected, a CP0 outputs a high level, and simultaneously transmits the 8-bit data received by the shift register to the single chip, the single chip detects whether the stop bit is an angle packet checksum, namely, determines whether data transmission of one cycle is finished, if no stop bit of an angle packet checksum is detected, data reception and transmission of each byte in a data packet are continuously finished, and if a stop bit of an angle packet checksum is detected, data transmission of one cycle is finished, the single chip microcomputer outputs a falling edge trigger pulse CP1, and outputs received one period data to the lower computer in parallel.
Fig. 5 is a simulation diagram of the present invention, where a is a serial data output trigger signal CP0, and when the gyro sensor signal output ends, the serial output sensor signal changes to high level, the period T =10ms, and the gyro sensor signal output time (low level time) is 2.8 ms. B is serial data output, and the output is carried out once in 10ms, and each time needs 2.8 ms. C is a parallel data output trigger signal CP1, and when the sensor signal output ends, the sensor signal is output in parallel, and when the sensor signal output ends, the level changes to high, the period T =10ms, and the sensor signal output time (low level time) is 0.28 ms. D is parallel data output, and the data is output once in 10ms, and each time needs 0.28 ms.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. A novel data output system of a gyroscope sensor is characterized by comprising the gyroscope sensor, an 8-bit shift register and a single chip microcomputer, wherein the input end of the 8-bit shift register is electrically connected with a serial output port of the gyroscope sensor, the output end of the 8-bit shift register is in signal connection with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is in signal connection with a lower computer;
the serial output end TX of the gyroscope sensor is in signal connection with a DSA port of the 8-bit shift register and is also in signal connection with a P3.0 port of the singlechip; 8-bit output ports Q0-Q7 of the 8-bit shift register are connected with P1.0-P1.7 ports of the single chip microcomputer through signals; the P3.2 port of the single chip microcomputer periodically outputs a pulse signal CP0, and the output is electrically connected with the CP end of the 8-bit shift register after being inverted; the P3.3 port of the singlechip outputs a pulse trigger signal CP 1; the P0.0-P0.7 port of the single chip microcomputer is in signal connection with the lower computer and outputs the detection value of the gyroscope sensor in parallel.
2. The novel gyroscope sensor data output system according to claim 1, wherein the 8-bit shift register model is 74LS164 and the single-chip microcomputer selects STC89C 52.
3. The novel gyroscope sensor data output system according to claim 1, wherein the gyroscope sensor outputs data in serial mode 1, and transmits a frame data packet every 10ms, and the data packet content comprises an acceleration packet, an angular velocity packet, and an angle packet; each packet occupies 11 bytes, including: the data processing system comprises a packet header, a packet identifier, an X-axis data low byte, an X-axis data high byte, a Y-axis data low byte, a Y-axis data high byte, a Z-axis data low byte, a Z-axis data high byte, a temperature low byte, a temperature high byte and a checksum.
4. A data output control method based on the novel gyroscope sensor data output system of claim 3, characterized in that the specific control method is as follows:
s1: a gyroscope sensor TX end outputs data in a serial mode 1, and a singlechip detects a header initial bit sent by the TX end;
s2: a P3.2 pin of the singlechip outputs a trigger signal CP0, an 8-bit shift register receives a CP0 signal, and the signal is triggered at each falling edge of CP0 to shift and register 1-bit data;
s3: the singlechip detects the stop bit of each byte, when the stop bit is detected, the CP0 outputs a high level signal, if the stop bit signal is not detected, the S2 is repeated;
s4: in the CP0 high-level period, the singlechip receives 8-bit data signals received by the 8-bit shift register;
s5: the singlechip detects the start bit of the next byte, repeats S1-S4, and sequentially shifts, registers and outputs each byte of data in 3 data packets to the singlechip;
s6: the single chip microcomputer detects the checksum stop bit of the angle packet, if the information stop bit of the checksum in the angle packet is detected, the serial data receiving in one period is finished, and the port P3.3 of the single chip microcomputer generates 1 falling edge signals CP1 to provide a trigger signal for the lower computer to receive, so that the completeness and the accuracy of the signals received by the lower computer are ensured.
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