CN215524802U

CN215524802U - Weighing sensor equipment

Info

Publication number: CN215524802U
Application number: CN202121307345.3U
Authority: CN
Inventors: 李树伟
Original assignee: Shanghai Tianhe Automation Instrumentation Co ltd
Current assignee: Shanghai Tianhe Automation Instrumentation Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-01-14
Anticipated expiration: 2031-06-11

Abstract

The utility model discloses weighing sensor equipment which comprises a sensor shell and an aviation connector, wherein the sensor shell is made of ASA material, three side outer walls of the sensor shell are respectively provided with a semicircular cambered surface protruding outwards, one end of the sensor shell is integrally formed with a cable inlet, a clamping groove parallel to the outer surface of the sensor shell is integrally formed in the sensor shell, a PCB (printed circuit board) is installed in the clamping groove in a clamping manner, a filter, a memory, a three-axis acceleration sensor, a weighing sensor and a CAN (controller area network) transceiving controller are soldered on the PCB, and the outer surface of one side of the sensor shell is provided with an adhesive layer; the utility model discloses a sticker on the adhesive linkage only need tear off and just can fix the sensor housing on the spring steel sheet of vehicle, can measure, need not to change body construction, and the repacking of having avoided the vehicle has guaranteed the reliability that the vehicle travel, has the convenient characteristics of installation and use.

Description

Weighing sensor equipment

Technical Field

The utility model particularly relates to the technical field of sensors, and particularly relates to weighing sensor equipment.

Background

A device capable of converting a weight signal into an electric signal is called a load cell, and is classified into a photoelectric type, a vibration type, a capacitance type, a resistance strain type, a hydraulic type, and the like according to a conversion method of the load cell. Of which resistive strain gauge sensors are most widely used.

Among the prior art, strain gauge sensor need fix completely in the application of on-vehicle weighing in the atress department, fixes with high strength bolt etc. usually, has the installation difficulty and the shortcoming of easy damage to measure and get up still to receive the influence of some other factors, cause the measuring result inaccurate, be difficult to satisfy the user demand.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a weighing sensor device.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a weighing sensor equipment, includes sensor housing and aviation connector, sensor housing is the ASA material, and three side outer walls of sensor housing all are equipped with outside bellied semi-circular cambered surface, and the cable import of sensor housing one end integrated into one piece has the draw-in groove that is on a parallel with sensor housing surface in the sensor housing, and the PCB circuit board is installed to the joint in the draw-in groove, and the soldering has wave filter, memory, triaxial acceleration sensor, weighing sensor and CAN transceiver controller on the PCB circuit board, and sensor housing one side surface is equipped with the adhesive linkage.

Further, a cable joint is fixedly installed in the cable inlet.

Furthermore, an electric cable is connected between the PCB circuit board and the wiring port of the aviation connector, the cable penetrates through the cable connector, and the corrugated pipe is further sleeved on the outer side of the cable.

Furthermore, a threaded hole is formed in the outer wall of one side of the sensor shell, and a fixing screw is connected to the inner thread of the threaded hole.

Furthermore, a battery pack is soldered on the PCB.

Furthermore, the sensor shell is fixed with a cover plate through a fixing screw, and the specification of the cover plate is matched with that of the sensor shell.

The utility model has the beneficial effects that:

1. through the setting of the structural adhesive linkage of sensor housing, only need tear the sticker on the adhesive linkage and just can fix sensor housing on the spring steel sheet of vehicle, can measure, perhaps can fix through glue, need not to change body construction, avoid the repacking of vehicle to guarantee the reliability that the vehicle travel, have the installation and use convenient characteristics.

2. Through triaxial acceleration sensor, wave filter and weighing sensor's setting, utilize triaxial acceleration sensor to measure the deformation of the spring plate of vehicle, the triaxial acceleration value that will gather converts the deformation that the XYZ axle angle value indicates the spring plate into through the computational formula, filters interference wave through the wave filter for the device can provide reliable and stable data.

3. Through the setting of CAN transceiver control ware on the PCB circuit board for the device has adopted CAN bus communication, has that communication distance is far away, communication speed is fast, but advantages such as the connecting node is many, CAN guarantee high resolution triaxial acceleration sensor's data real-time.

Drawings

Fig. 1 is a schematic diagram of an exploded structure of a load cell apparatus according to the present invention;

fig. 2 is a partial structural schematic diagram of a load cell apparatus according to the present invention.

In the figure: 1. an aircraft joint; 2. a bellows; 3. a cable joint; 4. a sensor housing; 5. a PCB circuit board; 6. a cover plate; 7. a cable; 8. a memory; 9. a three-axis acceleration sensor; 10. a weighing sensor; 11. a card slot; 12. a CAN transceiver controller; 13. and fixing the screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. It should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and their meaning in the context of this patent may be understood by those skilled in the art as appropriate.

Referring to fig. 1-2, a weighing sensor device comprises a sensor shell 4 and an aviation connector 1, wherein the aviation connector 1 is used for a power supply and a communication interface, the sensor shell 4 is made of ASA material, three side outer walls of the sensor shell 4 are respectively provided with an outwardly convex semicircular arc surface, heat dissipation of the device is facilitated, one end of the sensor shell 4 is integrally formed with a cable inlet, a clamping groove 11 parallel to the outer surface of the sensor shell 4 is integrally formed in the sensor shell 4, a PCB circuit board 5 is clamped and installed in the clamping groove 11, a filter, a memory 8, a triaxial acceleration sensor 9, a weighing sensor 10 and a CAN transceiver controller 12 are soldered on the PCB circuit board 5, a cable 7 is electrically connected between the PCB circuit board 5 and a wiring port of the aviation connector 1, and a battery pack is soldered on the PCB circuit board 5;

the load cell 10 is an ARM microcontroller consisting essentially of Cortex-M3 as the core;

the battery pack adopts a current mode single-chip voltage reducer switching regulator to provide a 3.3V power supply for the weighing sensor 10;

the CAN transceiver controller 12 has communication capability, CAN transmit data by using a CAN bus interface, and supports a plurality of weighing sensors 10 to be used on one bus at the same time; the CAN transceiver controller 12 is a technically mature electronic component, and its models are various: SJA1000T, MCP2515T-I/SO, and CTM8251KD, the models of which are not limited in this embodiment and can be selected according to specific situations;

the weighing sensor 10 has signal acquisition capacity and can read the value of a high-resolution triaxial acceleration sensor through an SPI bus; the three-axis acceleration sensor 9 is an electronic component with mature technology, and the types thereof are various: MMA8451QR1, KXTJ2-1009, SCA3300-D01, the model is not limited in this embodiment, and can be selected according to specific situations; then, a filter is used for filtering the collected triaxial acceleration sensor values by adopting Kalman filtering and FIR filtering algorithms, Kalman filtering is to adopt a state space model of signals and noise, the estimation of state variables is updated by utilizing the estimation value of the previous moment and the observation value of the current moment, and the estimation value of the current moment is calculated, so that the method is very suitable for real-time processing; the filter is an electronic component with mature technology, the model of the filter is not limited in the embodiment, and the filter can be selected according to an algorithm carried by the filter;

the weighing sensor 10 accesses data to a plurality of serial memories 8 through an I2C bus, the memory part is mainly used for storing the operating parameters of the device, and a double backup and CRC16 data checking mechanism is adopted to prevent the loss of the operating parameters;

the outer surface of one side of the sensor shell 4 is provided with an adhesive layer, the sensor shell 4 can be fixed on a spring steel plate of a vehicle only by tearing off stickers on the adhesive layer, measurement can be carried out, or the sensor shell can be fixed through glue without changing the structure of the vehicle body, the vehicle driving reliability is ensured by avoiding vehicle refitting, and the device has the characteristic of convenient installation and use, specifically, the weighing sensor 10 obtains the self inclination angle by obtaining the three-axis acceleration on the three-axis acceleration sensor 9, when the vehicle is on a flat ground, the angle of the device perpendicular to the XY plane is 0, when the vehicle is on the ground of a slope, the angle of the device perpendicular to the XY plane is the slope angle, the component of the angle on the perpendicular plane is calculated as a compensation angle, when the vehicle is on the slope, the deformation quantity of the three-axis acceleration sensor 9 can also be influenced by the slope, then, the component of the deformation amount of the triaxial acceleration sensor 9 on the vertical plane is calculated, and the vertical component is subtracted or added with the vertical component of the device to obtain the real deformation amount of the triaxial acceleration sensor 9.

Fixed mounting has cable joint 3 in the cable inlet, and cable 7 passes cable joint 3, and bellows 2 has still been cup jointed in the cable 7 outside, and threaded hole is opened to 4 one side outer walls of sensor housing, and threaded hole female connection has set screw 13, and sensor housing 4 is fixed with apron 6 through set screw 13, and the specification of apron 6 and the specification looks adaptation of sensor housing 4.

The working principle of the embodiment is as follows: the sensor shell 4 can be fixed on a spring steel plate of a vehicle by tearing off a sticker on an adhesive layer, measurement can be carried out without changing the structure of the vehicle body, modification of the vehicle is avoided, the reliability of vehicle driving is guaranteed, the device has the characteristic of convenient installation and use, when the device is powered on, a microcontroller on a weighing sensor 10 initializes all hardware, CRC16 verification is carried out on parameters in a memory 8, if CRC errors of the running parameters of the weighing sensor 10 occur, backup running parameter data are read, CRC16 verification is carried out, if the calibration is correct, the backup data are restored to the running parameters of the weighing sensor 10, if the calibration is wrong, the running parameter initialization is carried out, double data backup storage is carried out, so that the normal work of a module is prevented from being influenced by the wrong running parameters, then data acquisition is carried out on a high-resolution triaxial acceleration sensor 9 according to the set acquisition speed, then, FIR and kalman filtering processing is performed by using a filter to obtain stable and reliable sensor data, then, the CAN reception is detected to complete interruption, and after the interruption is received, the received data is analyzed, the own communication protocol of the CAN transceiver controller 12 includes a function of reading and writing a register, which is mainly used for reading and setting all the operation parameters of the weighing sensor 10, and when the register is written, the weighing sensor 10 needs to store the newly written operation parameters.

The above description is only for the preferred embodiment 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 equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a weighing sensor equipment, includes sensor housing (4) and aviation connector (1), a serial communication port, sensor housing (4) are the ASA material, the three side outer walls of sensor housing (4) all are equipped with outside bellied semi-circular cambered surface, sensor housing (4) one end integrated into one piece has the cable import, integrated into one piece has draw-in groove (11) that is on a parallel with sensor housing (4) surface in sensor housing (4), PCB circuit board (5) are installed to draw-in groove (11) interior joint, PCB circuit board (5) go up the tin welding and have the wave filter, memory (8), triaxial acceleration sensor (9), weighing sensor (10) and CAN transceiver controller (12), sensor housing (4) one side surface is equipped with the adhesive linkage.

2. A load cell apparatus as claimed in claim 1, wherein: and a cable joint (3) is fixedly arranged in the cable inlet.

3. A load cell apparatus as claimed in claim 2, wherein: the electric connection has cable (7) between PCB circuit board (5) and the wiring mouth of aviation connector (1), and cable (7) pass cable joint (3), and corrugated pipe (2) have still been cup jointed in the cable (7) outside.

4. A load cell apparatus as claimed in claim 1, wherein: the sensor shell (4) is characterized in that a threaded hole is formed in the outer wall of one side of the sensor shell, and a fixing screw (13) is connected to the inner thread of the threaded hole.

5. A load cell apparatus as claimed in claim 1, wherein: and the PCB (5) is soldered with a battery pack.

6. The load cell apparatus of claim 4, wherein: the sensor shell (4) is fixed with a cover plate (6) through a fixing screw (13), and the specification of the cover plate (6) is matched with that of the sensor shell (4).