CN111722573A - Three-axis acceleration sensor based on CAN bus and rail vehicle - Google Patents
Three-axis acceleration sensor based on CAN bus and rail vehicle Download PDFInfo
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- CN111722573A CN111722573A CN202010721933.5A CN202010721933A CN111722573A CN 111722573 A CN111722573 A CN 111722573A CN 202010721933 A CN202010721933 A CN 202010721933A CN 111722573 A CN111722573 A CN 111722573A
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- 230000001133 acceleration Effects 0.000 title claims abstract description 65
- 230000006854 communication Effects 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims abstract description 34
- 238000002955 isolation Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 11
- 230000007175 bidirectional communication Effects 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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Abstract
The invention discloses a three-axis acceleration sensor based on a CAN bus, which comprises a sensor mounting seat, a sensor body and a connector socket, wherein the sensor mounting seat is provided with a plurality of connecting holes; the sensor body and the connector socket are both arranged on the sensor mounting seat; the sensor body comprises a power isolation conversion circuit, an MCU system circuit, an acceleration acquisition circuit, a CAN communication circuit and a peripheral circuit; the MCU system circuit is respectively connected with the acceleration acquisition circuit and the CAN communication circuit in two directions, and the CAN communication circuit is connected with the connector socket. The invention has simple structure and convenient assembly; the sensor body adopts a CAN bus structure, thereby effectively avoiding bus collision and having a reliable error processing and detecting mechanism. The invention also discloses a rail vehicle, which comprises the rail vehicle and a three-axis acceleration sensor based on the CAN bus; the three-axis acceleration sensor based on the CAN bus is arranged on the rail vehicle, and the safety and riding comfort of the rail vehicle are improved through monitoring the rail vehicle by the acceleration sensor.
Description
Technical Field
The invention relates to the field of traffic equipment, in particular to a three-axis acceleration sensor of a CAN bus, and further relates to a rail vehicle comprising the sensor.
Background
In the running process of the railway vehicle, the riding comfort of passengers during the running of the vehicle is considered, and the vehicle is required to be ensured within a certain acceleration range in the running direction; meanwhile, in order to ensure the safety of the vehicle during turning and prevent the vehicle from derailing due to overlarge transverse acceleration, the transverse acceleration of the vehicle is required to be not more than a certain range according to the weight of the vehicle. Therefore, it is necessary to monitor the acceleration of the rail vehicle.
At present, with the increasing number of various electronic control units of the acceleration sensor of the railway vehicle, the data transmission quantity is rapidly increased, and connecting wires among the electronic control units are more and more, so that the communication reliability among the control units is reduced and the wiring difficulty is increased.
Therefore, an acceleration sensor with high monitoring accuracy, high reliability and simple structure is urgently needed to solve the above problems.
Disclosure of Invention
The invention provides a three-axis acceleration sensor based on a CAN bus, which aims to solve the technical problems of low monitoring precision, poor reliability and complex structure of the conventional acceleration sensor, and has the following specific technical scheme:
a three-axis acceleration sensor based on a CAN bus comprises a sensor mounting seat, a sensor body and a connector socket;
the sensor body and the connector socket are both arranged on the sensor mounting seat;
the sensor body comprises a mounting plate, and a power isolation conversion circuit, an MCU system circuit, an acceleration acquisition circuit, a CAN communication circuit and a peripheral circuit which are arranged on the mounting plate; the power isolation conversion circuit is respectively connected with the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit and is used for supplying power to the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit; the acceleration acquisition circuit is in bidirectional communication connection with the MCU system circuit and is used for acquiring and transmitting information; the MCU system circuit is in bidirectional communication connection with the CAN communication circuit and used for receiving and transmitting information, and the CAN communication circuit is connected with the connector socket.
Preferably, in the above technical solution, the acceleration acquisition circuit includes a three-axis micro-mechanical capacitive accelerometer, and the CAN communication circuit includes an isolated CAN transceiver;
the MCU system circuit sends a control instruction to the three-axis micro-mechanical capacitive accelerometer through the GPIO port, and the three-axis micro-mechanical capacitive accelerometer performs acceleration signal transmission with the MCU system circuit through the SPI serial bus;
the CAN communication circuit and the MCU system circuit are in signal transmission through CAN _ RX and CAN _ TX;
the CAN communication circuit sends signals to the outside through the isolated CAN transceiver.
Preferably, the sensor body further comprises a shielding shell, and the power isolation conversion circuit, the MCU system circuit, the acceleration acquisition circuit, the CAN communication circuit and the peripheral circuit are all arranged in the shielding shell.
Preferably, in the above technical solution, the sensor mounting base is provided with a first through hole and a second through hole; the sensor body is arranged in the sensor mounting seat through the first through hole; the connector socket is connected with the sensor body and is positioned in the second through hole.
Preferably, the sensor mounting seat is internally provided with a mounting column, and the mounting plate of the sensor body is fixedly arranged on the mounting column.
Above technical scheme is preferred, including the apron, the apron sets up in first through-hole department, can realize the sealed to the sensor mount pad through the cooperation of connector socket and apron.
Preferably, in the above technical scheme, the joint of the cover plate and the first through hole and the joint of the connector socket and the second through hole are both provided with sealing parts for sealing the sensor mounting seat.
The technical scheme of the invention has the following beneficial effects:
(1) the invention discloses a three-axis acceleration sensor based on a CAN bus, which comprises a sensor mounting seat, a sensor body and a connector socket; the structure is simple, the assembly is convenient, and the production cost is reduced; the sensor body adopts a CAN bus structure, so that the cost of the lead and the wiring difficulty are reduced, bus conflict is effectively avoided, a reliable error processing and detecting mechanism is provided, and the anti-interference capability is strong.
(2) The acceleration acquisition circuit adopts a three-axis micro-mechanical system (MEMS) capacitive accelerometer, has high detection precision, can realize accurate measurement of low-frequency acceleration, and also has a self-checking function and a zero calibration function; thereby control MEMS sensor through MCU system circuit connection acceleration acquisition circuit, convert the SPI signal into CAN bus signal to digital signal's form output realizes the low pass filtering function in sensor body is inside.
(3) In the invention, the connecting part of the cover plate and the first through hole and the connecting part of the connector socket and the second through hole are respectively provided with the sealing element, so that the stability of the internal environment of the sensor mounting seat is ensured, the guarantee is provided for the working environment of the sensor body, and the stability and the reliability of the sensor body are greatly improved.
The invention also discloses a rail vehicle, which comprises the rail vehicle and the three-axis acceleration sensor based on the CAN bus; the triaxial acceleration sensor based on the CAN bus is arranged on the rail vehicle, and the safety and riding comfort of the rail vehicle CAN be greatly improved through monitoring the rail vehicle by the acceleration sensor.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is an exploded view of a three-axis acceleration sensor based on a CAN bus in the present embodiment;
FIG. 2 is a schematic diagram of the structure of the sensor body of FIG. 1;
wherein, 1, a sensor mounting seat; 2. a sensor body; 3. a connecting seat socket; 4. a first through hole; 5. a second through hole; 6. a cover plate; 7. and a seal.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example (b):
a triaxial acceleration sensor based on a CAN bus is shown in figure 1 and comprises a sensor mounting seat 1, a sensor body 2 and a connector socket 3, and the triaxial acceleration sensor comprises the following specific structures:
the sensor body and the connector socket are both arranged on the sensor mounting seat;
the sensor body includes the mounting panel and sets up power isolation converting circuit, MCU system circuit, acceleration acquisition circuit, CAN communication circuit and peripheral circuit on the mounting panel, as shown in figure 2, specific connection is: the power isolation conversion circuit is respectively connected with the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit and is used for supplying power to the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit; the acceleration acquisition circuit is in bidirectional communication connection with the MCU system circuit and is used for acquiring and transmitting information; the MCU system circuit is in bidirectional communication connection with the CAN communication circuit and used for receiving and transmitting information, and the CAN communication circuit is connected with the connector socket 3. The circuit structures (the power isolation conversion circuit, the MCU system circuit, the acceleration acquisition circuit, the CAN communication circuit, and the peripheral circuit) in this embodiment CAN be referred to in the prior art.
A first through hole 4 and a second through hole 5 are formed in the sensor mounting seat 1; the sensor body 2 is arranged in the sensor mounting seat through the first through hole 4, specifically, four mounting columns (the height error of the mounting columns is less than 0.1mm) are arranged inside the sensor mounting seat, threaded holes are formed in the mounting columns, screw mounting holes corresponding to the threaded holes are formed in the mounting plate, and the mounting plate is fixed on the mounting columns by penetrating the screw mounting holes through screws and screwing the screw mounting holes into the threaded holes.
The connector socket 3 (preferably a forever and precious QS13 series 5-core connector) is connected with the sensor body 2 and is located in the second through hole 5, specifically, the middle part of the connector socket is fixedly arranged in the through hole of the flange plate, the flange plate is provided with a screw mounting hole, the sensor mounting seat 1 is provided with a threaded hole matched with the sensor socket, and the connector socket is screwed into the threaded hole through the screw mounting hole to be fixed in the second through hole on the sensor mounting seat 1.
In the embodiment, the sensor mounting seat further comprises a cover plate 6, wherein the cover plate is arranged at the first through hole, specifically, a screw mounting hole is formed in the cover plate, a threaded hole is correspondingly formed in the first through hole 4 of the sensor mounting seat, and the cover plate is screwed into the threaded hole by penetrating through the screw mounting hole through a screw so as to be fixed at the upper end of the first through hole 4; sealing parts are arranged at the joint of the cover plate and the first through hole 4 and the joint of the connector socket and the second through hole 5, specifically, a groove for accommodating the sealing part 7 is arranged on the cover plate 6, and the sealing part 7 is embedded into the groove; the sealing of the interior of the sensor mounting base 1 is realized through the matching of the cover plate, the sealing piece and the connector socket.
In this embodiment: the power isolation conversion circuit is connected with VCC- (power cathode) and VCC + (power anode) of the peripheral circuit, and is converted into 3.3V and 5V voltages which are transmitted to the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit, so that power supply to the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit is realized.
The acceleration acquisition circuit comprises a three-axis micro-machined capacitive accelerometer (the model is preferably ADXL355), the MCU system circuit comprises a microprocessor, and the CAN communication circuit comprises an isolated CAN transceiver.
The microprocessor sends a control instruction to the three-axis micro-mechanical capacitive accelerometer through a GPIO (general purpose programmable input/output) port to control the three-axis micro-mechanical capacitive accelerometer to acquire acceleration information; the three-axis micro-mechanical capacitive accelerometer transmits acceleration signals with an MCU system circuit through an SPI serial bus; and the CAN communication circuit and the MCU system circuit are in signal transmission through a CAN _ RX (receiving pin) and a CAN _ TX (transmitting pin).
The CAN communication circuit sends signals to the outside through an isolated CAN transceiver, and specifically, the isolated CAN transceiver transmits the signals to the outside through a CAN-H (high-bit data line) and a CAN-L (low-bit data line) through a connector socket.
The MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit are all arranged in a SHIELD (shielded enclosure), so that the sensor is not influenced by the outside, and the system stability is good.
The embodiment also discloses a rail vehicle, including rail vehicle reach triaxial acceleration sensor based on the CAN bus, triaxial acceleration sensor based on the CAN bus sets up on rail vehicle for rail vehicle's acceleration monitoring.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the technical scope of the present invention.
Claims (8)
1. A three-axis acceleration sensor based on a CAN bus is characterized by comprising a sensor mounting seat (1), a sensor body (2) and a connector socket (3);
the sensor body and the connector socket are both arranged on the sensor mounting seat;
the sensor body comprises a mounting plate, and a power isolation conversion circuit, an MCU system circuit, an acceleration acquisition circuit, a CAN communication circuit and a peripheral circuit which are arranged on the mounting plate; the power isolation conversion circuit is respectively connected with the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit and is used for supplying power to the MCU system circuit, the acceleration acquisition circuit and the CAN communication circuit; the acceleration acquisition circuit is in bidirectional communication connection with the MCU system circuit and is used for acquiring and transmitting information; the MCU system circuit is in bidirectional communication connection with the CAN communication circuit and used for receiving and transmitting information, and the CAN communication circuit is connected with the connector socket (3).
2. The CAN-bus based tri-axial acceleration sensor of claim 1, characterized in that the acceleration acquisition circuit comprises a tri-axial micro-machined capacitive accelerometer, the CAN communication circuit comprises an isolated CAN transceiver;
the MCU system circuit sends a control instruction to the three-axis micro-mechanical capacitive accelerometer through the GPIO port, and the three-axis micro-mechanical capacitive accelerometer performs acceleration signal transmission with the MCU system circuit through the SPI serial bus;
the CAN communication circuit and the MCU system circuit are in signal transmission through CAN _ RX and CAN _ TX;
the CAN communication circuit sends signals to the outside through the isolated CAN transceiver.
3. The CAN-bus based triaxial acceleration sensor of claim 2, wherein the sensor body further comprises a shielding housing, and the power isolation conversion circuit, the MCU system circuit, the acceleration acquisition circuit, the CAN communication circuit and the peripheral circuit are disposed in the shielding housing.
4. The CAN-bus based triaxial acceleration sensor according to claim 1, wherein the sensor mount (1) is provided with a first through hole (4) and a second through hole (5); the sensor body is arranged in the sensor mounting seat through a first through hole (4); the connector socket is connected with the sensor body and is positioned in the second through hole (5).
5. The CAN-bus based triaxial acceleration sensor of claim 4, wherein the sensor mounting seat is provided therein with a mounting pillar, and the mounting plate of the sensor body is fixedly disposed on the mounting pillar.
6. The CAN bus based triaxial acceleration sensor according to claim 5, comprising a cover plate (6) arranged at the first through hole (4), the sealing of the sensor mount being enabled by the cooperation of the connector socket and the cover plate.
7. The CAN bus based triaxial acceleration sensor according to claim 6, wherein the connection of the cover plate to the first through hole (4) and the connection of the connector socket to the second through hole (5) are provided with a sealing member for sealing of the sensor mount.
8. A rail vehicle, characterized by comprising a rail vehicle and the CAN-bus based three-axis acceleration sensor according to any one of claims 1 to 7, which is provided on the rail vehicle for acceleration monitoring of the rail vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010721933.5A CN111722573A (en) | 2020-07-24 | 2020-07-24 | Three-axis acceleration sensor based on CAN bus and rail vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010721933.5A CN111722573A (en) | 2020-07-24 | 2020-07-24 | Three-axis acceleration sensor based on CAN bus and rail vehicle |
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| CN111722573A true CN111722573A (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010721933.5A Pending CN111722573A (en) | 2020-07-24 | 2020-07-24 | Three-axis acceleration sensor based on CAN bus and rail vehicle |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201983789U (en) * | 2011-03-09 | 2011-09-21 | 刘胜 | Two-axis inclined angle measuring device based on CAN (Controller Area Network) bus |
| CN108089027A (en) * | 2017-12-28 | 2018-05-29 | 中国电子科技集团公司第十三研究所 | Sensor and navigation attitude instrument based on MEMS capacitive micro-acceleration gauge |
| CN209961232U (en) * | 2019-05-20 | 2020-01-17 | 苏州曼普拉斯传感科技有限公司 | High-precision inertial navigation sensor |
| CN212160425U (en) * | 2020-07-24 | 2020-12-15 | 湖南联诚轨道装备有限公司 | Three-axis acceleration sensor based on CAN bus and rail vehicle |
-
2020
- 2020-07-24 CN CN202010721933.5A patent/CN111722573A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201983789U (en) * | 2011-03-09 | 2011-09-21 | 刘胜 | Two-axis inclined angle measuring device based on CAN (Controller Area Network) bus |
| CN108089027A (en) * | 2017-12-28 | 2018-05-29 | 中国电子科技集团公司第十三研究所 | Sensor and navigation attitude instrument based on MEMS capacitive micro-acceleration gauge |
| CN209961232U (en) * | 2019-05-20 | 2020-01-17 | 苏州曼普拉斯传感科技有限公司 | High-precision inertial navigation sensor |
| CN212160425U (en) * | 2020-07-24 | 2020-12-15 | 湖南联诚轨道装备有限公司 | Three-axis acceleration sensor based on CAN bus and rail vehicle |
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