Novel CAN communication type weighing device circuit

Abstract

The utility model provides a novel CAN communication type weighing device circuit, and relates to the technical field of driving elevator circuits, the novel CAN communication type weighing device circuit comprises an analog-to-digital conversion circuit, an ARM chip and an output CAN communication circuit, the ARM chip comprises a single-chip microcomputer, the analog-to-digital conversion circuit comprises an ADS analog-to-digital conversion chip, the analog-to-digital conversion circuit comprises a load sensor analog quantity signal J, and the load sensor analog quantity signal J is connected with the output CAN communication circuit. The output CAN communication circuit comprises a CAN transceiving chip and a CAN transceiver, and the ARM chip and the power input end of the analog-to-digital conversion circuit are connected with a power module; the technical key points are as follows: the output CAN communication circuit communicates with the single chip microcomputer, so that the CAN transceiver chip communicates between the CAN transceiver and an external system, and after the analog-to-digital conversion circuit converts an analog quantity signal of the weighing device into a digital quantity signal, the ARM chip can obtain the digital quantity signal for functional and CAN protocol communication programming. And the output CAN communication circuit carries out digital quantity communication, so that signal transmission delay is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator driving circuits, in particular to a novel CAN communication type weighing device circuit. Background Art

[0002] An elevator is a permanent transportation device that serves several specific floors in a building, with its car running on at least two rigid rails that are perpendicular to the horizontal plane or inclined at an angle of less than 15° to the plumb line. There are also step-type ones, with the treads mounted on the tracks and running continuously, commonly known as escalators or moving walkways. A fixed lifting device that serves specified floors. A vertical lift has a car that runs between at least two rigid rails that are perpendicular or inclined at an angle of less than 15°. The size and structure of the car are convenient for passengers to enter and exit or for loading and unloading goods.

[0003] The elevator weight load controller system plays an important role in the operation of the elevator. The weighing controller consists of two parts, one is the controller part and the other is the weighing sensor part. The weighing sensor converts the weight signal into an electrical signal and sends it to the controller part through a transmission cable. The controller part performs calculations and completes the elevator weighing. When the weight in the elevator car changes, the controller can output multiple sets of relay contact signals, as well as 0-10mA current signals or 0-10V or -10V-+10V voltage signals according to requirements. When overloaded, the controller will sound and light alarm, providing accurate data for elevator weighing and starting.

[0004] The existing elevator weighing device performs overload monitoring based on sound and light alarm technology, and converts the weight signal obtained by the weighing sensor into an electrical signal, which is transmitted via a cable. During this process, errors and failures occur in the circuit standard signal, resulting in slow signal speed and signal delay in the weighing device. Utility Model Content

[0005] In order to overcome the problem that the circuit standard signal of the existing elevator weighing device has errors and failures during weighing, resulting in slow operating signal speed of the weighing device and signal delay, the embodiment of the present application provides a novel CAN communication weighing device circuit, by making the output CAN communication circuit communicate with the STM32 single-chip microcomputer, so that the CAN transceiver chip communicates between the CAN transceiver and the external system, after the analog-to-digital conversion circuit converts the analog signal of the weighing device into a digital signal, the ARM chip can obtain the digital signal for function and CAN protocol communication programming, and the output CAN communication circuit performs digital communication, thereby realizing intelligent learning of elevator weighing and high-precision weighing during elevator operation, and avoiding signal transmission delay.

[0006] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0007] A novel CAN communication weighing device circuit comprises an analog-to-digital conversion circuit, an ARM chip and an output CAN communication circuit, wherein the ARM chip comprises an STM32 single-chip microcomputer, the analog-to-digital conversion circuit comprises an ADS analog-to-digital conversion chip, a signal output end of the ADS analog-to-digital conversion chip is connected to a signal input end of the ARM chip, the signal output end of the STM32 single-chip microcomputer is connected to a signal input end of the output CAN communication circuit, the analog-to-digital conversion circuit converts an analog quantity signal of a weighing device into a digital quantity signal, the ARM chip obtains the digital quantity signal to perform function and CAN protocol communication programming, and the output CAN communication circuit performs digital quantity communication.

[0008] In one possible implementation, the power input end of the ARM chip and the analog-to-digital conversion circuit is connected to a power module, which includes a power supply and a rectifier bridge. The power supply provides AC / DC 24V power to the power module circuit and outputs DC24V through a rectifier bridge and a filter capacitor.

[0009] In one possible implementation, the power module also includes a power management chip and a linear voltage regulator chip. The power input end of the power management chip is connected to the power output end of the rectifier bridge and the filter capacitor. The power management chip converts the input DC24V into a 5V power output, and the output 5V power is converted into a 3.3V power by the linear voltage regulator chip.

[0010] In a possible implementation, the STM32 single-chip microcomputer performs digital processing and control on the overall function of the circuit, burns the completed programming program into the STM32 single-chip microcomputer through a programming interface, and configures the CAN communication protocol inside the STM32 single-chip microcomputer.

[0011] In one possible implementation, the analog-to-digital conversion circuit includes an analog signal of a load sensor, which is input to AINN1 / AINP1 on the analog signal port of the load sensor, and after being operationally amplified by an ADS analog-to-digital conversion chip, is input to an STM32 microcontroller through a DOUT / SCLK / PDWN / SPEED / GAIN1 / GAIN0 port, and is processed by the STM32 microcontroller in a programmed manner.

[0012] In a possible implementation, the output CAN communication circuit communicates with the STM32 microcontroller via CANTX / CANRX.

[0013] In a possible implementation, the output CAN communication circuit includes a CAN transceiver chip and a CAN transceiver, the CAN transceiver chip and the CAN transceiver are electrically connected, and the CAN transceiver chip communicates between the CAN transceiver and an external system.

[0014] In one possible implementation, the output end of the STM32 single-chip microcomputer is connected to a digital tube display circuit, and the button display part a / b / c / d / e / f / g / h of the STM32 single-chip microcomputer is connected to the status display part of the weighing and system functions of the digital tube display circuit.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects:

[0016] By making the output CAN communication circuit communicate with the STM32 microcontroller, the CAN transceiver chip communicates between the CAN transceiver and the external system. After the analog-to-digital conversion circuit converts the analog signal of the weighing device into a digital signal, the ARM chip can obtain the digital signal for function and CAN protocol communication programming, and the output CAN communication circuit performs digital communication, thereby realizing intelligent learning and high-precision weighing of the elevator during elevator operation and avoiding signal transmission delay. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the power supply circuit diagrams of the utility model;

[0018] Figure 2 This is the second power supply circuit diagram of the utility model;

[0019] Figure 3 This is the third power supply circuit diagram of the utility model;

[0020] Figure 4 This is the AD analog-to-digital conversion circuit of the sensor of the utility model;

[0021] Figure 5 This is the digital tube display circuit of the utility model;

[0022] Figure 6 This is the ARM single chip microcomputer circuit of the utility model;

[0023] Figure 7 The utility model outputs a CAN communication circuit.

[0024] Description of the drawings: U1, STM32 microcontroller; U2, ADS analog-to-digital conversion chip; U3, CAN transceiver chip; U4, linear voltage regulator chip; U5, power management chip; U6, rectifier bridge; C10, filter capacitor; J, load sensor analog signal; PZ, power supply. DETAILED DESCRIPTION

[0025] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0026] Embodiment 1:

[0027] This embodiment introduces a specific structure of a new type of CAN communication weighing device circuit. Figure 1-Figure 7 As shown, it includes an analog-to-digital conversion circuit, an ARM chip and an output CAN communication circuit, the ARM chip includes an STM32 single-chip computer U1, the analog-to-digital conversion circuit includes an ADS analog-to-digital conversion chip U2, the analog-to-digital conversion circuit includes a load sensor analog signal J, and the output CAN communication circuit includes a CAN transceiver chip U3 and a CAN transceiver;

[0028] Among them, the signal output end of the ADS analog-to-digital conversion chip U2 is connected to the signal input end of the ARM chip, the signal output end of the STM32 microcontroller U1 is connected to the signal input end of the output CAN communication circuit, the STM32 microcontroller U1 performs digital processing and control on the overall function of the circuit, burns the completed programming program to the STM32 microcontroller U1 through the programming interface, and configures the CAN communication protocol inside the STM32 microcontroller U1;

[0029] At the same time, the output CAN communication circuit communicates with the STM32 microcontroller U1 through CANTX / CANRX, the CAN transceiver chip U3 is electrically connected to the CAN transceiver, and the CAN transceiver chip U3 communicates between the CAN transceiver and the external system. After the analog-to-digital conversion circuit converts the analog signal of the weighing device into a digital signal, the ARM chip can obtain the digital signal for function and CAN protocol communication programming, and the output CAN communication circuit performs digital communication. With the simplicity and speed of the CAN protocol communication signal, delays in the transmission of the weighing signal can be avoided;

[0030] Secondly, if Figure 4 As shown, the analog signal of the load sensor is input to AINN1 / AINP1 on the J port, and after being processed by the ADS analog-to-digital conversion chip U2 for operational amplification, it is input to the STM32 microcontroller U1 through the DOUT / SCLK / PDWN / SPEED / GAIN1 / GAIN0 port, and is processed by the STM32 microcontroller U1 in a programmed manner, which can convert the analog signal obtained by the sensor into a digital signal;

[0031] Furthermore, the power input terminals of the ARM chip and the analog-to-digital conversion circuit are connected to a power module, such as Figure 1As shown, the power module includes a power supply PZ, a rectifier bridge U6, a power management chip U5 and a linear voltage regulator chip U4. The power input end of the power management chip U5 is connected to the power output end of the rectifier bridge U6 and the filter capacitor C10. The power supply PZ provides AC / DC 24V power to the power module circuit, and outputs DC24V through the rectifier bridge U6 and the filter capacitor C10. The power management chip U5 converts the input DC24V into a 5V power output to provide working power for analog-to-digital conversion, digital tubes, and CAN communication. The output 5V power is converted into a 3.3V power by the linear voltage regulator chip U4 to provide power for the ARM chip U1.

[0032] In some examples, the output end of the STM32 microcontroller U1 is connected to a digital tube display circuit, and the button display part a / b / c / d / e / f / g / h of the STM32 microcontroller U1 is connected to the status display part of the weighing and system functions of the digital tube display circuit;

[0033] Among them, by using the STM32 microcontroller U1 to perform self-learning processing on the weighing signal and system signal, the button display part of the STM32 microcontroller U1 is connected to the digital tube weighing status and system function status display part through a / b / c / d / e / f / g / h, and the weighing status of the elevator can be displayed externally.

[0034] By adopting the above technical solution:

[0035] The above design inputs AC / DC 24V power to the power circuit through the power supply PZ, and outputs DC24V after being processed and converted by the rectifier bridge U6 and the filter capacitor C10, so that the DC24V input power management chip outputs 5V power to provide working power for the analog-to-digital conversion circuit, the digital tube display circuit, and the output CAN communication circuit. After the 5V power is input to the ADS analog-to-digital conversion chip U2, it outputs 3.3V power to provide power for the STM32 microcontroller U1.

[0036] When the analog-to-digital conversion circuit, the ARM chip and the output CAN communication circuit are in working condition, the output CAN communication circuit communicates with the STM32 microcontroller U1 through CANTX / CANRX, so that the CAN transceiver chip U3 communicates between the CAN transceiver and the external system. After the analog-to-digital conversion circuit converts the analog signal of the weighing device into a digital signal, the ARM chip can obtain the digital signal for function and CAN protocol communication programming, and the output CAN communication circuit performs digital communication. With the help of the simple and fast characteristics of the CAN protocol communication signal, the intelligent learning and high-precision weighing of the elevator can be realized during the operation of the elevator, avoiding signal transmission delays.

[0037] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A new type of CAN communication weighing device circuit, characterized in that: include: Analog-to-digital conversion circuit; ARM chips; as well as Output CAN communication circuit; The ARM chip comprises an STM32 single-chip microcomputer (U1), the analog-to-digital conversion circuit comprises an ADS analog-to-digital conversion chip (U2), a signal output end of the ADS analog-to-digital conversion chip (U2) is connected to a signal input end of the ARM chip, the signal output end of the STM32 single-chip microcomputer (U1) is connected to a signal input end of an output CAN communication circuit, the analog-to-digital conversion circuit converts an analog quantity signal of a weighing device into a digital quantity signal, the ARM chip obtains the digital quantity signal to perform function and CAN protocol communication programming, and the output CAN communication circuit performs digital quantity communication.

2. A novel CAN communication weighing device circuit as claimed in claim 1, characterized in that: The power input end of the ARM chip and the analog-to-digital conversion circuit is connected to a power module, and the power module includes a power supply (PZ) and a rectifier bridge (U6); The power supply (PZ) provides AC / DC 24V power to the power module circuit, and outputs DC24V through a rectifier bridge (U6) and a filter capacitor (C10).

3. A novel CAN communication weighing device circuit as claimed in claim 2, characterized in that: The power module further comprises a power management chip (U5) and a linear voltage regulator chip (U4); a power input end of the power management chip (U5) is connected to a rectifier bridge (U6) and a power output end of a filter capacitor (C10); the power management chip (U5) converts an input DC24V into a 5V power output; and the output 5V power is converted into a 3.3V power by the linear voltage regulator chip (U4).

4. A novel CAN communication weighing device circuit as claimed in claim 1, characterized in that: The STM32 single-chip microcomputer (U1) performs digital processing and control on the overall function of the circuit, burns the completed programming program into the STM32 single-chip microcomputer (U1) through a programming interface, and configures a CAN communication protocol inside the STM32 single-chip microcomputer (U1).

5. A novel CAN communication weighing device circuit as claimed in claim 1, characterized in that: The analog-to-digital conversion circuit comprises an analog signal (J) of a load sensor, which is inputted into an AINN1 / AINP1 port, and after being processed by an ADS analog-to-digital conversion chip (U2) for operational amplification, is inputted into an STM32 single-chip computer (U1) through a DOUT / SCLK / PDWN / SPEED / GAIN1 / GAIN0 port, and is processed by the STM32 single-chip computer (U1) in a programmed manner.

6. A novel CAN communication weighing device circuit as claimed in claim 1, characterized in that: The output CAN communication circuit communicates with the STM32 single chip microcomputer (U1) via CANTX / CANRX.

7. A novel CAN communication weighing device circuit as claimed in claim 1, characterized in that: The output CAN communication circuit comprises a CAN transceiver chip (U3) and a CAN transceiver, the CAN transceiver chip (U3) and the CAN transceiver are electrically connected, and the CAN transceiver chip (U3) communicates between the CAN transceiver and an external system.

8. A novel CAN communication weighing device circuit as claimed in claim 1, characterized in that: The output end of the STM32 single-chip computer (U1) is connected to a digital tube display circuit, and the button display part a / b / c / d / e / f / g / h of the STM32 single-chip computer (U1) is connected to a state display part of the weighing and system functions of the digital tube display circuit.

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