CN215186796U

CN215186796U - Cascadable self-addressing tilt angle sensor

Info

Publication number: CN215186796U
Application number: CN202120306822.8U
Authority: CN
Inventors: 何磊; 靳大为; 张飞龙; 武红刚; 辛峰
Original assignee: Taiyuan Xiangming Intelligent Control Technology Co ltd
Current assignee: Taiyuan Xiangming Intelligent Control Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-12-14
Anticipated expiration: 2031-02-03

Abstract

The utility model relates to a cascade self-addressing tilt sensor, belonging to the technical field of cascade self-addressing tilt sensors; the technical problem to be solved is as follows: the improvement of a hardware structure of the tilt sensor capable of being cascaded and self-addressed is provided; the technical scheme for solving the technical problem is as follows: a cascade self-addressing tilt angle sensor comprises a control circuit board arranged in a sensor shell, wherein a central controller and a data communication module are integrated on the control circuit board, and the central controller is respectively connected with the data communication module and an angle monitoring module in a bidirectional mode through leads; the power supply input end of the central controller is connected with the power supply module; the utility model discloses be applied to inclination sensor.

Description

Cascadable self-addressing tilt angle sensor

Technical Field

The utility model relates to a tilt sensor of addressing certainly can cascade belongs to the tilt sensor technical field of addressing certainly can cascade.

Background

With the development of industrial automation towards intellectualization in recent years, the demand on a nerve ending sensing system is more and more, and equipment used by a monitoring system generally carries a plurality of sensors of the same type to carry out data acquisition; for example, 3-5 tilt sensors are required to be installed for monitoring the dynamic change of the posture of a hydraulic support, more than 4 tilt sensors are required to be connected for data acquisition for monitoring a self-moving tail device, the connection of the multi-tilt sensors puts higher requirements on hardware and software for data transmission, the application scenes of the multi-sensors adopt the unique communication address of the sensing device leaving the factory, and on-site special equipment addressing or hardware dialing addressing is adopted, and the sensing devices bring certain difficulties for on-site management, construction and subsequent maintenance in the multi-application scenes, such as replacement of spare parts, re-addressing and the like, so that the use limitation of the sensors is large, the workload of re-installation for address configuration is large, the use efficiency of the sensors is seriously influenced, and the measurement precision is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome not enough that exists among the prior art, the technical problem that will solve is: an improvement in the hardware architecture of a cascade self-addressable tilt sensor is provided.

In order to solve the technical problem, the utility model discloses a technical scheme be: a cascade self-addressing tilt angle sensor comprises a control circuit board arranged in a sensor shell, wherein a central controller and a data communication module are integrated on the control circuit board, and the central controller is respectively connected with the data communication module and an angle monitoring module in a bidirectional mode through leads;

the power supply input end of the central controller is connected with the power supply module;

the chip used in the central controller is a control chip U1;

the chip used in the data communication module is a communication chip U2 with the model of MAX 3485;

the chip used in the angle monitoring module is a sensor chip U3 with the model of MPU 6050;

an MOS tube Q1 and a triode Q2 are arranged inside the power supply module, the model of the MOS tube Q1 is IRFR5410, and the model of the triode Q2 is HE 8050;

the peripheral circuit structure of the central controller is as follows:

the pin 1 of the control chip U1 is connected with the pin 1 of the communication chip U2;

the 2 pins of the control chip U1 are respectively connected with the 2 pins and the 3 pins of the communication chip U2;

the pin 3 of the control chip U1 is connected with the pin 4 of the communication chip U2;

the pin 5 of the communication chip U2 is grounded;

the pin 6 of the communication chip U2 is connected with one end of a resistor R17 in parallel, one end of a resistor R25 is connected with one end of a resistor R19, the other end of the resistor R25 is connected with a 3.3V input power supply, and the other end of the resistor R19 is connected with a pin 2 of a TVS diode D8 and a pin 2 of an equipment interface P2 respectively;

the pin 7 of the communication chip U2 is connected with one end of a resistor R5 and the other end of a resistor R17 in parallel and then connected with one end of a resistor R15, and the other end of the resistor R15 is connected with a pin 1 of the TVS diode D8 and a pin 3 of the equipment interface P2 respectively;

the pin 8 of the communication chip U2 is connected with one end of a capacitor C15 in parallel and then connected with one end of a resistor R14, the other end of the resistor R14 is connected with a 3.3V input power supply, and the other end of the capacitor C15 is connected with the other end of a resistor R5 in parallel and then connected with the ground;

the pin 4 of the control chip U1 is connected with one end of a resistor R23, and the other end of the resistor R23 is connected with one end of a resistor R24 in parallel and then connected with the base electrode of a triode Q2;

a collector of the triode Q2 is connected with one end of the resistor R16 in parallel and then is connected with a grid of the MOS transistor Q1, and a drain of the MOS transistor Q1 is connected with a pin 1 of the equipment interface P2; the source electrode of the MOS transistor Q1 is connected with the other end of the resistor R16 in parallel and then is connected with a 12V input power supply;

an emitter of the triode Q2 is connected with the other end of the resistor R24 in parallel and then grounded after 4 pins of the equipment interface P2;

the 5 pins of the control chip U1 are connected with the 23 pins of the sensor chip U3;

the pin 6 of the control chip U1 is connected with the pin 24 of the sensor chip U3;

the pin 7 of the control chip U1 is connected with the pin 12 of the sensor chip U3;

the pin 1 of the sensor chip U3 is connected with the pin 11 of the sensor chip U3 in parallel, and one end of the resistor R4 is grounded;

the pin 9 of the sensor chip U3 is connected with the other end of the resistor R4 in parallel and then is connected with one end of the resistor R9;

the pin 8 of the sensor chip U3 is connected with the pin 13 of the sensor chip U3 and one end of a capacitor C3 in parallel and then connected with one end of a resistor R12, and the other end of the resistor R12 is connected with a 3.3V input power supply;

the pin 18 of the sensor chip U3 is connected with the other end of the capacitor C3, one end of the capacitor C5 and one end of the capacitor C7 in parallel and then grounded;

the pin 20 of the sensor chip U3 is connected with the other end of the capacitor C5;

the pin 10 of the sensor chip U3 is connected to the other end of the capacitor C7.

The utility model discloses beneficial effect for prior art possesses does: the utility model provides a possess automatic addressing, can mark, can cascade the inclination sensor who uses, its inside corresponding cascade control circuit and angle monitoring circuit that is provided with can be applied to many inclinations and detect the place, like the coal-winning machine, from moving the tail, take a step from removing, hydraulic support, engineering machine tool etc. contrast prior art, the utility model discloses mainly through the self-adaptation adjustment when subordinate's power supply control circuit, 485 communication circuit realize the multi-sensor application, automatic allocation communication address realizes the at any time dynamic calibration of sensor, effectively improves the detection precision of sensor.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic diagram of the circuit structure of the present invention;

in the figure: the system comprises a central controller 1, a data communication module 2, an angle monitoring module 3 and a power module 4.

Detailed Description

As shown in fig. 1, the utility model relates to a tilt sensor capable of being cascaded and addressing automatically, which comprises a control circuit board arranged in a sensor shell, wherein a central controller 1 and a data communication module 2 are integrated on the control circuit board, and the central controller 1 is respectively connected with the data communication module 2 and an angle monitoring module 3 in two directions through wires;

the power supply input end of the central controller 1 is connected with the power supply module 4;

the chip used in the central controller 1 is a control chip U1;

the chip used in the data communication module 2 is a communication chip U2 with the model of MAX 3485;

the chip used in the angle monitoring module 3 is a sensor chip U3 with the model of MPU 6050;

an MOS tube Q1 and a triode Q2 are arranged inside the power module 4, the model of the MOS tube Q1 is IRFR5410, and the model of the triode Q2 is HE 8050;

the peripheral circuit structure of the central controller 1 is as follows:

the pin 5 of the communication chip U2 is grounded;

As shown in FIG. 1, the utility model provides a but cascade control's inclination sensor has automatic addressing, can mark the function, can be applicable to various application environment, the utility model discloses it has dedicated power supply control circuit, serial communication circuit and angle monitoring circuit to this type of sensor design.

The power supply control circuit in the power module is provided with a single-chip microcomputer control signal port M _ OK, a triode Q2 and an MOS tube Q1, the M _ OK port is used for controlling the conduction of a triode Q2 when the power supply control circuit works, the conduction of the MOS tube Q1 can be controlled after the triode Q2 is conducted, the power supply of the VCC12V power supply to an interface P2 of a subordinate device is achieved, and the power supply of the subordinate device is controlled by a control signal sent by a single-chip microcomputer control chip.

The serial port communication circuit in the data communication module is provided with an RS485 communication transceiver MAX3485, and a terminal resistor R17, a TVS array diode D8 and an RS485_ N, RS485_ P communication port are simultaneously connected to an inlet communication interface and an outlet communication interface, so that parallel communication of upper and lower-level equipment is realized.

The angle monitoring module is internally provided with a 6-axis inclination angle control chip and a peripheral circuit, the angle monitoring module performs data interaction with the single chip microcomputer chip through an I2C interface, and the operational inclination angle of the DMP processor built in the inclination angle control chip can reach 0.1 degree of precision.

The utility model discloses when using, through the inside predetermined automatic addressing procedure of operation microcontroller work: the automatic addressing program mainly completes the work of on-line equipment monitoring, lower power supply control, lower equipment addressing and the like; the equipment is powered on and defaulted as initial equipment, and when the online equipment monitors that no other equipment exists, the online equipment automatically addresses the equipment; if the bus has the equipment, the microcontroller notifies the bus that the initial equipment is arranged on the bus, waits for addressing, and powers on the lower-level equipment after the initial equipment is successfully addressed; the addressed equipment monitoring bus has idle equipment and no subordinate equipment, and the addressed initial equipment is subordinate equipment; in addition, the system is also provided with a disconnection monitoring function aiming at the inclination angle sensor, and when the disconnection of the sensor is monitored, the power supply of the post-stage equipment is controlled to be disconnected;

above-mentioned on-line monitoring and addressing function all realize through 485 bus MODBUS-RTU station number monitoring and write specific address data, the utility model discloses when carrying out angle calibration and calculating, install inclination sensor standard plane or set for the reference plane, the host computer of maring adopts standard MODBUS RTU agreement to write in through the 485 interface and sets for address data and begin to mark.

Further, the utility model discloses a control circuit includes preceding stage power supply, angle monitoring, serial communication circuit and back-end power supply control circuit, and preceding stage power supply among the power module comes from cascade connection's higher level equipment, and back-end power supply control circuit realizes the power supply control of back-end equipment, and serial communication circuit makes the front and back level parallelly connected for data transmission and cascade equipment communication; the angle monitoring circuit obtains the original Euler angle information of the angle chip through an internal bus, and a Central Processing Unit (CPU) is a core part for computing and processing feedback information of the sensor.

The utility model provides a power supply control circuit realizes the hardware realization part of cascade power supply control, and port VCC _12V is the preceding stage power supply, and MOS pipe Q1 restricts the preceding stage power supply and supplies power to subordinate equipment, adopts the MOS pipe can effectively reduce the pressure drop loss when supplying power to subordinate; the port M _ OK is a control pin of the central processing unit, the M _ OK is matched with resistors R23 and R24 and an NPN triode Q2 to realize the inversion of a control signal, the low level is inverted into a high level when the control pin of the M _ OK port is electrified or fails, and the high level realizes the cut-off of an MOS transistor Q1; resistance R16 pull-up VCC _12V is used for restricting the high level after M _ OK reversal for MOS pipe Q1 matches the high level, can realize the cascaded power supply control of M _ OK signal control like this, and the processing method of cascaded power supply control is based on the utility model discloses automatic addressing control procedure realizes.

The data communication module is specifically a serial port communication module, a module circuit mainly comprises a MAX3485 chip and an accessory device peripheral circuit, and signals of ports UART _ RX, UAET _ TX and TXRX _ EN of the module circuit are introduced into a central processing unit of the sensor and can be freely switched to receive and send the signals; the RS485_ P, RS485_ N port is merged into the front-stage communication bus and the rear-stage communication bus, the communication buses of the cascade equipment are shared, the bus data interaction condition can be monitored as long as the equipment is powered on, and a data interaction hardware interface is provided for the equipment; a TVS array D8 is adopted between the RS485_ P, RS485_ N lines, and resistors R15 and R19 are connected in series in the signal line for anti-interference design, so that the anti-interference design can be used for resisting the impact of pulse and static electricity on a control circuit; the resistors R5 and R25 are used as pull-up and pull-down resistors, and the resistor R17 is used as a terminal resistor to clamp the bus voltage, so that the bus driving capability and adaptability are improved.

In a control circuit of an angle monitoring module, a 3-axis gyroscope and a 3-axis acceleration sensing chip U3 are adopted, data communication is carried out between a port IIC _ SCL and an IIC _ SDL (I2C) bus of the sensing chip U3 and a CPU, a DMP processor arranged in the sensing chip U3 can carry out filtering and fusion processing on the 3-axis gyroscope and the 3-axis angular velocity data, attitude data (Euler angle) after attitude calculation is directly output, the attitude calculation frequency can reach 200Hz at most, and the precision can reach 0.1 degree; the sensing chip is in data connection with the CPU through an I2C bus, and the CPU converts the Euler angle into standard inclination angle data to be displayed through the display screen.

The utility model discloses the basic flow of automatic addressing method does: at the start of addressing, the device is set with an initial number (invalid number 255); after the equipment is powered on, the bus is informed that the initial equipment is on line, when no equipment exists, the equipment compiles an address for the equipment, and the effective minimum address of the equipment is 1, so that the addressing of the first equipment can be completed; after addressing is completed, the equipment starts lower-level power supply, after the lower-level equipment supplies power, the bus is firstly informed that initial equipment is on line (255 numbered equipment), and the first equipment (1 numbered equipment) receives a signal that new equipment is on line, and then the new equipment is addressed in sequence (2 numbered equipment); after the new device (No. 2) is compiled, the power supply is continuously supplied to the subordinate device, and the subordinate device is numbered in sequence (namely, the No. 2 device is numbered for the No. 3 device, the No. 3 device is numbered for the No. 4 device, and so on); the numbered equipment simultaneously carries out online monitoring on the subordinate equipment, and when the subordinate equipment is not online, if newly added equipment exists, the newly added equipment is numbered as the subordinate equipment; based on the steps, the numbering of the current maximum-number equipment to the subordinate equipment can be realized, and the free increase and the automatic numbering of the cascade equipment are realized.

The utility model discloses an angle calibration algorithm specifically do: the method comprises the steps that an address is set for writing equipment based on an MODBUS protocol to trigger a sensor calibration function, the sensor receives a calibration request and then corrects the current angle of 0 degree, and calibration parameters are written into a FLASH memory of a CPU to be stored, so that power failure is prevented from losing.

About the utility model discloses what the concrete structure need explain, the utility model discloses a each part module connection relation each other is definite, realizable, except that the special explanation in the embodiment, its specific connection relation can bring corresponding technological effect to based on do not rely on under the prerequisite of corresponding software program execution, solve the utility model provides a technical problem, the utility model provides a model, the connection mode of parts, module, specific components and parts that appear all belong to the prior art such as the published patent that technical staff can acquire before the application day, published journal paper, or common general knowledge, need not to describe in detail for the technical scheme that the present case provided is clear, complete, realizable, and can be according to this technical means or obtain corresponding entity product.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A cascade-able, self-addressable tilt sensor, characterized by: the device comprises a control circuit board arranged in a sensor shell, wherein a central controller (1) and a data communication module (2) are integrated on the control circuit board, and the central controller (1) is respectively in bidirectional connection with the data communication module (2) and an angle monitoring module (3) through leads;

the power supply input end of the central controller (1) is connected with the power supply module (4);

the chip used in the central controller (1) is a control chip U1;

the chip used in the data communication module (2) is a communication chip U2 with the model of MAX 3485;

the chip used in the angle monitoring module (3) is a sensor chip U3 with the model of MPU 6050;

an MOS tube Q1 and a triode Q2 are arranged inside the power supply module (4), the model of the MOS tube Q1 is IRFR5410, and the model of the triode Q2 is HE 8050;

the peripheral circuit structure of the central controller (1) is as follows:

the pin 5 of the communication chip U2 is grounded;