CN217980485U

CN217980485U - Weighing sensor based on Modbus communication protocol

Info

Publication number: CN217980485U
Application number: CN202222322315.0U
Authority: CN
Inventors: 靳博宇
Original assignee: Qinhuangdao Development Zone Prospect Photoelectric Tech Co ltd
Current assignee: Qinhuangdao Development Zone Prospect Photoelectric Tech Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-12-06
Anticipated expiration: 2032-09-01

Abstract

The utility model belongs to the metering device field especially relates to weighing sensor based on Modbus communication protocol, and it includes the sensor body, and the sensor body is I shape structure, and the sensor body includes upper segment, hypomere, and the top surface of upper segment is the installation face, and installation face both ends are equipped with the fixed orifices on going up, and the fixed orifices is used for with elevator rope hitch plate fixed connection, and the both ends of hypomere all are equipped with bolt hole and two bolt holes and are diagonal distribution, are equipped with two foil gauges in the hypomere. The utility model solves the problem of inconsistent zero point of the existing sensor, the sensor and the elevator load controller use Modbus protocol to communicate, the sensor uses the calibration pressure to calibrate zero point after leaving factory, thus ensuring the consistency of zero point of the sensor; the acquisition module is integrated into the sensor, so that the cost of the elevator load controller is reduced; the problem that the circuit of the elevator load control instrument interferes with analog-digital signal conversion and collection to further cause deviation of collected sensor signals is solved.

Description

Weighing sensor based on Modbus communication protocol

Technical Field

The utility model belongs to the computer field especially relates to a weighing sensor based on Modbus communication protocol.

Background

At present elevator weighing equipment adopts the most resistance strain type weighing sensor, but this type of weighing sensor's collection module all sets up outside the sensor at present, the space of circuit board has been occupied, and the circuit board wiring is also complicated relatively, and present market resistance strain type weighing sensor's zero compensation technology is complicated, still must operate elevator load control appearance again after the on-the-spot sensor of changing and accomplish the calibration, the maintenance cost is high, the sensor is because of doing work the problem, can't guarantee the uniformity of sensor, it carries out a one-to-one calibration to need later stage cooperation elevator load control ware. The existing sensors only output resistance signals, and the acquisition circuits are arranged on an elevator load controller, and because the resistances of the sensors are different, the zero points of all the sensors are different, and the sensors need zero point calibration when being matched with the elevator load controller for use.

Disclosure of Invention

For solving the technical problem, the utility model provides a weighing sensor based on Modbus communication protocol, it includes sensor body, and sensor body is I shape structure, and sensor body includes upper segment, hypomere, and the top surface of upper segment is the installation face, and installation face both ends are equipped with the fixed orifices on, and the fixed orifices is used for with elevator rope hitch plate fixed connection, and the both ends of hypomere all are equipped with bolt hole and two bolt holes and are diagonal distribution, are equipped with two foil gauges in the hypomere.

Furthermore, a waist-shaped groove is arranged between the upper section and the lower section.

Further, be equipped with two foil gauges in the hypomere, it is concrete, the hypomere sets up the foil gauge chamber, is equipped with the foil gauge in the foil gauge chamber, still sets up in the foil gauge chamber and gathers communication board, and the foil gauge constitutes with gathering communication board and gathers communication circuit, gathers communication board and elevator load control appearance electricity and is connected.

Further, the strain gauge cavity is also provided with a strain gauge cavity baffle.

Furthermore, an analog-to-digital conversion chip and a single chip microcomputer main control chip are arranged on the acquisition communication board, and the analog-to-digital conversion chip and the single chip microcomputer main control chip are electrically connected.

Further, still set up 485 communication chip on gathering the communication board, 485 communication chip, singlechip master control chip electricity are connected, and 485 communication chip passes through the Modbus agreement and is connected and communicate with elevator load control appearance electricity.

Furthermore, gather the communication board and pass through the silica gel embedment in the foil gage intracavity, the lead wire of foil gage is the silk envelope curve, improves anti ability of buckling and better insulating nature.

Advantageous effects

The utility model solves the problem of inconsistent zero point of the existing sensor, the sensor and the elevator load controller use Modbus protocol to communicate, the sensor uses the calibration pressure to calibrate zero point after leaving factory, thus ensuring the consistency of zero point of the sensor; the acquisition module is integrated into the sensor, so that the cost of the elevator load control instrument is reduced; the problem that the circuit of the elevator load control instrument interferes the analog-digital signal conversion and collection, and further the collected sensor signal is deviated is solved.

Drawings

Fig. 1-3 are schematic structural views of the present invention.

Fig. 4 is a block diagram of the circuit connection of the present invention.

In the figure: 1-a sensor body, 11-an upper section, 12-a lower section, 111-a fixing hole, 121-a bolt hole, 122-a strain gauge, 1122-a waist-shaped groove, 201-a strain gauge cavity baffle, 202-an acquisition communication board and 203-a strain gauge cavity.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. As shown in fig. 1-3, the utility model discloses a sensor body 1, sensor body 1 are the I shape structure, and sensor body 1 includes upper segment 11, hypomere 12, and the top surface of upper segment 11 is the installation face, and installation face both ends are equipped with fixed orifices 111, and fixed orifices 111 is used for with elevator rope hitch plate fixed connection, and the both ends of hypomere 12 all are equipped with bolt hole 121 and two bolt holes 121 and are diagonal distribution, are equipped with two foil gauges 122 in the hypomere 12.

Preferably, a waist-shaped groove 1122 is further provided between the upper section 11 and the lower section 12.

Preferably, two strain gauges 122 are arranged in the lower section 12, specifically, a strain gauge cavity 203 is arranged in the lower section 12, the strain gauge 122 is arranged in the strain gauge cavity 203, an acquisition communication board 202 is further arranged in the strain gauge cavity 203, the strain gauge and the acquisition communication board 202 form an acquisition communication circuit, and the acquisition communication board 202 is electrically connected with an elevator load controller. The preferred strain gage cavity 203 is also provided with a strain gage cavity dam 201.

Preferably, as shown in fig. 3, the acquisition communication board 202 is provided with an analog-to-digital conversion chip and a single chip microcomputer main control chip, and the analog-to-digital conversion chip and the single chip microcomputer main control chip are electrically connected. Still set up 485 communication chip on gathering communication board 202, 485 communication chip, singlechip master control chip electricity are connected, and 485 communication chip passes through the Modbus agreement and is connected and communicate with elevator load control appearance electricity. The acquisition communication board 202 is encapsulated in the strain gauge cavity 203 through silicone gel, and the lead of the strain gauge 122 is a silk covered wire, so that the bending resistance and the better insulation property are improved.

The principle of the utility model is as follows:

the sensor is installed at the last rope hitch plate and the rope hitch plate of going up of elevator rope head subassembly directly, when the outside exerts pressure to the upper segment 11 of sensor body 1, the resistance bridge circuit that foil gage 122 is constituteed can produce deformation, its resistance value can change, and then make output voltage change, the analog-to-digital conversion chip of gathering communication board gathers this voltage that changes, singlechip main control chip converts the magnitude of voltage that changes into the pressure value that changes, and then obtain exerted pressure, and transmit this pressure value for elevator load control appearance through the 485 communication chip through the Modbus protocol.

The sensor is calibrated in a unified mode before leaving a factory, the sensor is communicated with an elevator load controller by using a Modbus communication protocol, a four-wire system connecting mode is used, namely a power supply VCC, a grounding GND, a 485 communication A and a 485 communication B, the elevator load controller is responsible for supplying power to the sensor, and when the sensor is used, the elevator load controller analyzes a data packet sent by the sensor and determines the current applied pressure value of the sensor by analyzing the data packet.

The utility model solves the problem of inconsistent zero point of the existing sensor, the sensor and the elevator load controller use Modbus protocol to communicate, the sensor uniformly uses the calibration pressure to calibrate the zero point after leaving the factory, and the zero point consistency of the sensor is ensured; the acquisition module is integrated into the sensor, so that the cost of the elevator load control instrument is reduced; the problem that the circuit of the elevator load control instrument interferes the analog-digital signal conversion and collection, and further the collected sensor signal is deviated is solved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. Weighing sensor based on Modbus communication protocol, a serial communication port, including the sensor body, the sensor body is I shape structure, and the sensor body includes upper segment, hypomere, and the top surface of upper segment is the installation face, and the installation face both ends are equipped with the fixed orifices on going up, the fixed orifices be used for with elevator rope hitch plate fixed connection, the both ends of hypomere all are equipped with the bolt hole and two bolt holes are diagonal distribution, are equipped with two foil gauges in the hypomere.

2. The Modbus communication protocol-based weighing sensor according to claim 1, wherein a waist-shaped groove is further arranged between the upper section and the lower section.

3. The weighing sensor based on the Modbus communication protocol according to claim 1, wherein two strain gauges are arranged in the lower section, specifically, a strain gauge cavity is arranged in the lower section, a strain gauge is arranged in the strain gauge cavity, a collecting communication board is further arranged in the strain gauge cavity, the strain gauge and the collecting communication board form a collecting communication circuit, and the collecting communication board is electrically connected with an elevator load controller.

4. The Modbus communication protocol-based load cell of claim 1, wherein the strain gage chamber is further configured with a strain gage chamber baffle.

5. The weighing sensor based on the Modbus communication protocol of claim 1, wherein the acquisition communication board is provided with an analog-to-digital conversion chip and a single-chip microcomputer main control chip, and the analog-to-digital conversion chip and the single-chip microcomputer main control chip are electrically connected.

6. The weighing sensor based on the Modbus communication protocol according to claim 1, wherein a 485 communication chip is further arranged on the acquisition communication board, the 485 communication chip is electrically connected with the single chip microcomputer main control chip, and the 485 communication chip is electrically connected with and communicates with the elevator load controller through the Modbus protocol.

7. The weighing sensor based on the Modbus communication protocol according to claim 1, wherein the acquisition communication board is encapsulated in the cavity of the strain gauge through silicone gel, and leads of the strain gauge are wrapped in silk threads, so that bending resistance and better insulation performance are improved.