Double-digital pointer type dial plate based on CAN FD local area network interface

Abstract

The utility model relates to a double-digital pointer type dial plate based on a CAN FD local area network interface, which adopts a reinforced CAN FD network interface, a micro stepping drive of a stepping motor and an electromagnetic energy-saving technology, and integrates a CAN FD interface connector, a double-path digital pointer, a double-path digital dial plate and a micro stepping drive through an integrated topological space layout, so that the double-digital pointer type dial plate is formed. Therefore, the robustness and robustness of the CAN FD bus for monitoring the real-time dynamic information of the terminal at the interface are greatly improved; besides, the amorphous alloy material is used in the iron core body of the stepping motor for the first time, iron loss of the stepping motor is obviously reduced, the service life of the amorphous alloy material is at least five to eight times that of LED and LCD display instruments, and therefore the amorphous alloy material can be widely applied to digital pointer type devices of various controllers and is wide in market prospect.

Description

Technical Field

[0001] The invention relates to a dual-digital pointer dial based on a CAN FD local area network interface, which adopts a CAN FD local area network interface, a micro-stepping motor micro-step driving technology and energy-saving electromagnetic technology, and is mainly used in pointer indicating devices of various instruments or controllers. Background Art

[0002] A micro-stepping motor is a motor that converts electrical pulse signals into angular displacements. It drives the pointer through its rotating shaft, and digitizes the traditional analog instrument pointer to replace the analog pointer of the hairspring type. This is a great idea. Why is the pointer driven by the rotating shaft of the stepper motor also called a digital pointer? That is because the number of steps of the stepper motor is only related to the number of input pulses, and is proportional, so it can be started and stopped quickly, and is easy to use with a binary microcontroller. Therefore, there is usually no need to add an additional feedback link in the drive circuit for precise positioning; the digitized instrument pointer is further connected to the CAN FD local area network, so that the instrument pointer is networked, highlighting the powerful application capabilities of pointer-type digital instruments. The present invention is unique in that it does not launch just a single-pointer driven digital dial, but a dual-pointer driven digital dial, so that more information can be displayed on a limited dial area.

[0003] It should be noted that this invention application is the result of the inventor's innovation in the early years and keeping pace with the times, including:

[0004] 1) “A micro stepping motor for instrumentation” applied for on October 10, 2008;

[0005] 2) “A dual-drive-axis micro-stepping motor” filed on October 14, 2008;

[0006] 3) “Mini stepper motor” applied for on March 22, 2010;

[0007] 4) “Concentric three-drive-axis micro-stepping motor” applied for on October 8, 2010;

[0008] The above invention patents are all related to micro-stepping motors and digital pointers, and have been granted patents. However, due to the passage of time, some have lost protection due to failure to pay annual fees. This in itself shows that the original applicant has a special liking for this and is never tired of it. It seems that there is still a market for digital pointer display instruments, because compared with LCD and LED digital display timers, the digital pointer driven by the stepper motor is more stable and intuitive than the jumping numbers, and it can also provide greater torque when running at low speeds. Because the digital pointer under micro-stepping does not have the flickering feeling of jumping numbers, it is very comfortable for users to observe, especially in many occasions that require qualitative understanding. Users can understand the current working conditions by just glancing at the dial, so digital pointer instruments are still popular. For example, the watches worn on people's wrists are often pointer-type. Those who customize their watches particularly like the feeling of showing their individuality by waving their hands and raising their wrists casually. Therefore, they also particularly favor high-end pointer-type watches, while fully digital electronic watches are not popular. Many of the indicators on airplanes and cars use pointers to indicate vehicle speed, speed, remaining fuel, remaining power, mileage, and altitude. Various controllers also like to use digital pointers to indicate voltage, current, pressure, temperature, and humidity.

[0009] Furthermore, the driving shaft of the micro stepper motor drives the pointer to replace the easily broken hairspring, which is the first key step in the transition from analog pointers to digital pointers, thus breaking the disadvantage of analog hairspring pointers that have been particularly easy to damage for decades. As for the birth of dual digital pointers, it is the second step in the evolution of digital pointers to diversified digital pointers. The upgraded version of the interface between the digital pointer dial and the CAN bus has further increased the application field of digital pointers and represents the highest level of current digital pointer applications. Its market prospects are certainly very broad. Summary of the invention

[0010] Based on this, the inventor of the application proposed a dual-digital pointer dial solution based on the CAN FD local area network interface, the specific contents of which are as follows:

[0011] A dual-digital pointer dial based on a CAN FD local area network interface is composed of a digital dial, a digital dial intermediate, a CAN FD plug, a PCB circuit board and a dual-axis stepper motor movement. The main points are:

[0012] The digital dial is engraved with voltage and current scales, the voltage scale is 10V to 65V, the current scale is 1A to 18A, and then multiplied by 10 times, so the voltage scale indication range is 100V to 650V, the current scale indication range is 10A to 180A;

[0013] The digital dial is connected to the middle plug connector hole through the middle external spiral on the digital dial, and the middle connector is connected to the front and rear of the plug respectively, wherein the front of the plug is connected to the CAN FD socket, and the four-core twisted wire passes through the wire hole at the rear of the plug and is connected to the connection plug at the front of the plug;

[0014] The PCB circuit board is circular and 1.6 mm thick, with a dual-shaft stepper motor movement component installed on one side, and a circuit control chip is surface-mounted and welded on the other side, including a single-chip microcomputer, a CAN FD interface chip, a driver chip, a high-speed optical isolation A, a high-speed optical isolation B, a high-speed optical isolation C, and a high-speed optical isolation D, and a dual-channel micro-stepping driver chip is surface-mounted and welded on the same side as the dual-shaft stepper motor movement;

[0015] The dual-shaft stepper motor movement is an electromagnetic drive part, which is composed of M-way and N-way electromagnetic drive components. First, one side of the PCB circuit board is surface mounted, and then the other side of the PCB circuit board is surface mounted. Then, the PCB circuit board is installed in the space of the digital dial intermediate body, wherein:

[0016] The M-circuit includes an M-circuit embedded active magnet, an M-circuit iron core, an M-circuit two-phase coil group, an M-circuit first-stage driven wheel, an M-circuit second-stage driven wheel, and an M-circuit pointer driving shaft. The short pointer is connected to the M-circuit pointer driving shaft, that is, the short pointer indicates the current scale on the digital dial;

[0017] The N-way includes N-way embedded active magnets, N-way iron core bodies, N-way two-phase coil groups, N-way first-stage driven wheels, N-way second-stage driven wheels, and N-way pointer drive shafts. The long pointer is connected to the N-way pointer drive shaft, that is, the long pointer indicates the voltage scale on the digital dial;

[0018] The relationship between the dual-axis stepper motor movement and the control circuit is as follows:

[0019] Both the M-way two-phase coil group and the N-way two-phase coil group are driven by a dual-way micro-step drive chip, and the dual-way micro-step drive chip is controlled by the drive chip, and the I / O port of the microcontroller controls the drive chip to ensure that each pulse can output a 1 / 12 degree drive pulse to the M-way two-phase coil group or the N-way two-phase coil group.

[0020] Furthermore, the gears, pointers and coil skeleton parts of the dual-shaft stepper motor movement are all injection molded using a wear-resistant and lubricating polymer synthetic polyamide engineering plastic. The material has high strength, high toughness and self-lubrication, and its wear resistance is far superior to other plastics.

[0021] Furthermore, the M-way iron core body and the N-way iron core body are both formed by laminating amorphous alloy bodies, thereby significantly reducing the iron loss of the stepper motor and greatly reducing the internal heat generated when the micro stepper motor is working.

[0022] Furthermore, the M-way embedded active magnet and the N-way embedded active magnet are both sintered from NdFeB micromagnets into tiny gear shapes, and the M-way embedded active magnet is embedded in the iron core body, and the N-way embedded active magnet is embedded in the iron core body, so that the magnetic circuit efficiency is doubled.

[0023] Furthermore, the digital dial intermediate body is connected in a spiral manner to the middle plug connector hole on the middle connector of the CAN FD plug through the intermediate outer spiral.

[0024] Furthermore, the CAN FD plug is a four-core twisted wire, including CAN FD+, CAN FD-, a +5V power line, and a common ground line GND. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment. Obviously, for those skilled in the art, this embodiment can be inferred from one example without creative work, and other similar drawings can be obtained based on these drawings.

[0026] Figure 1 A dual digital pointer dial appearance based on CAN FD local area network interface Figure 1 ;

[0027] Figure 2 A dual digital pointer dial appearance based on CAN FD local area network interface Figure 2 ;

[0028] Figure 3 A dual digital pointer dial appearance based on CAN FD local area network interface Figure 3 ;

[0029] Figure 4 A dual digital pointer dial decomposition based on CAN FD local area network interface Figure 1 ;

[0030] Figure 5 A dual digital pointer dial decomposition based on CAN FD local area network interface Figure 2 ;

[0031] Figure 6 A dual digital pointer dial decomposition based on CAN FD local area network interface Figure 3 ;

[0032] Figure 7 PCB circuit board and dual-channel stepper motor drive movement Figure 1 ;

[0033] Figure 8 PCB circuit board and dual-channel stepper motor drive movement Figure 1 ;

[0034] Fig. 9 PCB circuit board and interface drive circuit Figure 1 ;

[0035] Fig.10 PCB circuit board and interface drive circuit Figure 2 ;

[0036] Fig.11 PCB circuit board and dual-channel stepper motor drive movement Figure 3 .

[0037] 1 Digital dial

[0038] 1-1 Voltage scale

[0039] 1-2 Current scale

[0040] 1-3 Short pointer

[0041] 1-4 Long pointer

[0042] 2 Digital dial intermediate

[0043] 2-1 Intermediate outer helix

[0044] 3 CAN FD plug

[0045] 3-1 Front of the plug

[0046] 3-2 Middle connector

[0047] 3-3 Rear of plug

[0048] 3-4 Middle plug connector hole

[0049] 4 PCB circuit board

[0050] 4-1 Microcontroller

[0051] 4-2 CAN FD interface chip

[0052] 4-3 Driver chip

[0053] 4-4 High-speed optical isolation A

[0054] 4-5 High-speed optical isolation B

[0055] 4-6 High-speed optical isolation C

[0056] 4-7 High-speed optical isolation D

[0057] 4-8 Dual-channel micro-stepping driver chip

[0058] 5 Dual-axis stepper motor movement

[0059] 5-1 M-way embedded active magnet

[0060] 5-2 M-way iron core

[0061] 5-3 M-way two-phase line package

[0062] 5-4 M-way first stage driven wheel

[0063] 5-5 M road second stage driven wheel

[0064] 5-6 N-way embedded active magnet

[0065] 5-7 N-way iron core

[0066] 5-8 N-way two-phase line package

[0067] 5-9 N-way second-stage driven wheel

[0068] 5-10 M-way pointer drive shaft

[0069] 5-11 N-way pointer drive shaft

[0070] 5-12 N-way first-stage driven wheel DETAILED DESCRIPTION

[0071] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0072] A dual-digital pointer dial based on a CAN FD local area network interface, comprising a digital dial (1), a digital dial intermediate (2), a CAN FD plug (3), a PCB circuit board (4) and a dual-axis stepping motor movement (5), the main features of which are:

[0073] The digital dial (1) is engraved with a voltage scale (1-1) and a current scale (1-2), the voltage scale is 10V to 65V, the current scale is 1A to 18A, and then multiplied by 10, so that the voltage scale indication range is 100V to 650V, and the current scale indication range is 10A to 180A;

[0074] The digital dial (1) is connected to the middle plug connector hole (3-4) via the middle external spiral (2-1) on the digital dial, and the middle connector (3-2) is connected to the front part (3-1) and the rear part (3-3) of the plug respectively, wherein the front part (3-1) of the plug is connected to the CAN FD socket, and the four-core twisted wire passes through the wire hole of the rear part (3-3) of the plug and is connected to the connection plug of the front part (3-1) of the plug;

[0075] The double-sided PCB circuit board (4) is circular and 1.6 mm thick, with a dual-shaft stepper motor movement (5) component mounted on one side, and a circuit control chip surface-mounted and welded on the other side, including a single-chip microcomputer (4-1), a CAN FD interface chip (4-2), a driver chip (4-3), a high-speed optical isolation A (4-4), a high-speed optical isolation B (4-5), a high-speed optical isolation C (4-6), and a high-speed optical isolation D (4-7), while a dual-channel micro-stepping driver chip (4-8) is surface-mounted and welded on the same side as the dual-shaft stepper motor movement (5);

[0076] The dual-shaft stepper motor movement (5) is an electromagnetic drive part, which is composed of M-way and N-way electromagnetic drive components. First, one side of the PCB circuit board (4) is surface mounted, and then the other side of the PCB circuit board (4) is surface mounted. Then, the PCB circuit board (4) is installed in the space of the digital dial intermediate body (2), wherein:

[0077] The M-circuit comprises an M-circuit embedded active magnet (5-1), an M-circuit iron core (5-2), an M-circuit two-phase coil group (5-3), an M-circuit first-stage driven wheel (5-4), an M-circuit second-stage driven wheel (5-5), and an M-circuit pointer drive shaft (5-10); a short pointer (1-3) is connected to the M-circuit pointer drive shaft (5-10), that is, the short pointer (1-3) indicates the current scale (1-2) on the digital dial (1);

[0078] The N-way includes an N-way embedded active magnet (5-6), an N-way iron core (5-7), an N-way two-phase coil group (5-8), an N-way first-stage driven wheel (5-12), an N-way second-stage driven wheel (5-9), and an N-way pointer drive shaft (5-11), wherein a long pointer (1-4) is connected to the N-way pointer drive shaft (5-11), that is, the long pointer (1-4) indicates a voltage scale (1-1) on a digital dial (1);

[0079] The relationship between the dual-shaft stepper motor movement (5) and the control circuit is as follows:

[0080] The M-way two-phase coil group (5-3) and the N-way two-phase coil group (5-8) are both driven by a dual-way micro-step drive chip (4-8), and the dual-way micro-step drive chip (4-8) is controlled by the drive chip (4-3). The I / O port of the microcontroller (4-1) controls the drive chip (4-3) to ensure that each pulse can output a 1 / 12 degree drive pulse to the M-way two-phase coil group (5-3) or the N-way two-phase coil group (5-8).

[0081] Furthermore, the gears, pointers and coil skeleton parts of the dual-shaft stepper motor movement (5) are all injection-molded with a wear-resistant and lubricating synthetic polyamide engineering plastic, which has high strength, high toughness and self-lubricity, and its wear resistance is far superior to other plastics.

[0082] Furthermore, the M-way iron core body (5-2) and the N-way iron core body (5-7) are both made of laminated amorphous alloy bodies, thereby significantly reducing the iron loss of the stepper motor and significantly reducing the heat generated when the stepper motor is working.

[0083] Furthermore, the M-circuit embedded active magnet (5-1) and the N-circuit embedded active magnet (5-6) are both sintered from neodymium iron boron micromagnets into a tiny gear shape, and the M-circuit embedded active magnet (5-1) is embedded in the M-circuit iron core body (5-2), and the N-circuit embedded active magnet (5-6) is embedded in the N-circuit iron core body (5-7), thereby doubling the magnetic circuit efficiency.

[0084] Furthermore, the digital dial intermediate body (2) is connected in a spiral manner to a middle plug connector hole (3-4) on a middle connector (3-2) of a CAN FD plug (3) via an intermediate outer spiral (2-1).

[0085] Furthermore, the CAN FD plug (3) is a four-core twisted wire, including CAN FD+, CAN FD-, a +5V power line, and a common ground line GND. Beneficial Effects

[0086] A dual digital pointer dial based on a CAN FD local area network interface proposed in a preferred embodiment of the present invention has the following significant beneficial effects:

[0087] First, the present invention proposes a dual-digital pointer dial based on the CAN FD local area network interface, which takes the lead in integrating the CAN FD interface connector, dual-channel digital pointer, dual-channel digital dial, and micro-step drive into one with an integrated topological space, thereby realizing the most economical and overall optimal system structure, becoming a brand-new local area network bus product that has never been seen on the market, rather than an innovative method; the CAN FD is an improved version launched by the German Bosch company in 2012 based on the standard CAN, which caters to the advent of the artificial intelligence era (AI); in terms of practical operability, the design drawings of the present invention are all engineered.

[0088] Second, the present invention interfaces the digital pointer dial with the CAN FD local area network, thereby greatly improving the robustness and robustness of the CAN FD bus to the real-time dynamic information monitoring of the terminal at the interface. Among them, the 64 data packet structure, variable baud rate transmission efficiency and non-destructive arbitration mechanism also bring the underlying monitoring and online monitoring of industrial automation to a new level.

[0089] Third, the present invention also greatly simplifies the internal mechanism of the dual-axis stepper motor movement, so that each path of the dual-axis stepper motor movement has only one active magnet, one iron core, one two-phase coil, one secondary driven wheel, and one primary driven wheel, thereby making it possible to miniaturize the trackable dual digital dial; by the way, it also overcomes the inherent disadvantages of the digital pointer. If the pointer is directly pushed by the stepper motor drive shaft, the inherent step of the stepper motor will inevitably cause step jitter when the pointer rotates, causing a visual sense of jamming. However, through a two-pronged operation, that is, a 1 / 12 pulse signal is output through a dual-path micro-step drive chip, and then further refined into a micro-step through a reduction gear, the digital pointer can be realized. The silky rotation of the analog hairspring pointer when walking is achieved, thereby greatly improving the practicality of the digital pointer.

[0090] Fourth, the present invention applies amorphous alloy materials to the iron core of the stepper motor for the first time to replace silicon steel sheets, thereby significantly reducing the iron loss of the stepper motor, reducing the heat generation of the dual-digital pointer dial and the aging rate of components; thus, an unexpected result is that compared with LED and LCD instruments, the aging cycle of digital pointer instruments is longer, because when the pointer is not moving or refreshing, it basically consumes no electricity, so it is more environmentally friendly and energy-saving, and its lifespan is at least five to eight times that of LED and LCD digital instruments.

[0091] Fifth, the present invention adopts a dual digital pointer structure, which brings another unexpected result, that is, through a small yet powerful layout, changing the indication content on the digital dial and replacing the stationary program constitutes another different type of digital instrument; with a slight improvement, it can also be worn on the wrist, thus promoting the development of personal digital protective equipment.

[0092] In this specification, the principle and implementation of the present invention are explained by using the implementation example of the DC voltage and current digital pointer dial, so it can be applied to a three-phase rectifier circuit or a high-power charger. It should be pointed out that this implementation example is only used to help understand the core idea of ​​the present invention and should not be understood as a limitation of the present invention. Those skilled in the art understand that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the attached claims specification belong to the protection scope of the present invention.

Claims

1. A dual-digital pointer dial based on a CAN FD local area network interface, comprising a digital dial (1), a digital dial intermediate (2), a CAN FD plug (3), a PCB circuit board (4) and a dual-axis stepper motor movement (5), characterized in that: The digital dial (1) is engraved with a voltage scale (1-1) and a current scale (1-2), the voltage scale is 10V to 65V, the current scale is 1A to 18A, and then multiplied by 10 times, so that the voltage scale indication range is 100V to 650V, and the current scale indication range is 10A to 180A; The digital dial (1) is connected to the middle plug connector hole (3-4) via the middle external spiral (2-1) on the digital dial, and the middle connector (3-2) is connected to the front part (3-1) and the rear part (3-3) of the plug respectively, wherein the front part (3-1) of the plug is connected to the CAN FD socket, and the four-core twisted wire passes through the wire holes of the rear part (3-3) of the plug and the middle connector (3-2) and is connected to the connection plug of the front part (3-1) of the plug; The PCB circuit board (4) is circular and 1.6 mm thick, with a dual-shaft stepper motor movement (5) component mounted on one side, and a circuit control chip surface-mounted and welded on the other side, including a single-chip microcomputer (4-1), a CAN FD interface chip (4-2), a driver chip (4-3), a high-speed optical isolation A (4-4), a high-speed optical isolation B (4-5), a high-speed optical isolation C (4-6), and a high-speed optical isolation D (4-7), while a dual-channel micro-stepping driver chip (4-8) is surface-mounted and welded on the same side as the dual-shaft stepper motor movement (5); The dual-shaft stepper motor movement (5) is an electromagnetic drive part, which is composed of M-way and N-way electromagnetic drive components. First, one side of the PCB circuit board (4) is surface mounted, and then the other side of the PCB circuit board (4) is surface mounted. Then, the PCB circuit board (4) is installed in the space of the digital dial intermediate body (2), wherein: The M-circuit comprises an M-circuit embedded active magnet (5-1), an M-circuit iron core (5-2), an M-circuit two-phase coil group (5-3), an M-circuit first-stage driven wheel (5-4), an M-circuit second-stage driven wheel (5-5), and an M-circuit pointer drive shaft (5-10); a short pointer (1-3) is connected to the M-circuit pointer drive shaft (5-10), that is, the short pointer (1-3) indicates the current scale (1-2) on the digital dial (1); The N-way includes an N-way embedded active magnet (5-6), an N-way iron core (5-7), an N-way two-phase coil group (5-8), an N-way first-stage driven wheel (5-12), an N-way second-stage driven wheel (5-9), and an N-way pointer drive shaft (5-11), wherein a long pointer (1-4) is connected to the N-way pointer drive shaft (5-11), that is, the long pointer (1-4) indicates a voltage scale (1-1) on a digital dial (1); The relationship between the dual-shaft stepper motor movement (5) and the control circuit is as follows: The M-way two-phase coil group (5-3) and the N-way two-phase coil group (5-8) are both driven by a dual-way micro-step drive chip (4-8), and the dual-way micro-step drive chip (4-8) is controlled by the drive chip (4-3). The I / O port of the microcontroller (4-1) controls the drive chip (4-3) to ensure that each pulse can output 1 / 12 degree of drive power to the M-way two-phase coil group (5-3) or the N-way two-phase coil group (5-8).

2. A dual digital pointer dial based on a CAN FD local area network interface according to claim 1, characterized in that: The gears and coil frame parts of the dual-shaft stepper motor movement (5) are both injection-molded from high-molecular synthetic polyamide engineering plastics.

3. The dual digital pointer dial based on the CAN FD local area network interface according to claim 1, characterized in that: The M-way iron core body (5-2) and the N-way iron core body (5-7) are both made of stacked amorphous alloy bodies.

4. The dual digital pointer dial based on the CAN FD local area network interface according to claim 1, characterized in that: The M-way embedded active magnet (5-1) and the N-way embedded active magnet (5-6) are both sintered from neodymium iron boron micromagnets into a tiny gear shape, and the M-way embedded active magnet (5-1) is embedded in the M-way iron core body (5-2), and the N-way embedded active magnet (5-6) is embedded in the N-way iron core body (5-7).

5. The dual digital pointer dial based on the CAN FD local area network interface according to claim 1, characterized in that: The digital dial intermediate body (2) is connected in a spiral manner to a middle plug connector hole (3-4) on a middle connector (3-2) of a CAN FD plug (3) via an intermediate outer spiral (2-1).

6. The dual digital pointer dial based on the CAN FD local area network interface according to claim 1, characterized in that: The CAN FD plug (3) is a four-core twisted wire, including CAN FD+, CAN FD-, a +5V power line, and a common ground line GND.

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