TWI489114B - CAN-BUS communication method and system for embedded oscilloscope - Google Patents

Description

CAN-BUS communication method and system for embedded oscilloscope

The invention relates to a CAN-BUS communication method and system for an embedded oscilloscope, in particular to a CAN-BUS communication technology capable of collecting measurement information and monitoring the operation of the oscilloscope.

Press, the oscilloscope is an electronic measuring instrument, mainly used to display the dynamic waveform of the voltage signal. The role of the oscilloscope is to convert a time-varying voltage signal into a time domain or a frequency domain curve . The electrical signal, which is originally invisible, can be converted into a visible light signal that can be observed on a two-dimensional plane, and the time domain and frequency domain properties of the electrical signal can be analyzed by an oscilloscope. Not only that, the digital oscilloscope can quickly analyze the signal, measure the frequency, amplitude, period and other information, and can add, subtract, multiply and divide the signal, digitize and archive or print the signal, and even make Fourier. The complex calculation of conversion is indeed very convenient for the processing of experimental data in the industry.

As far as is known, the use of an oscilloscope to detect the electrical signal of a test object (such as a circuit component, a circuit board, an electrical device, or a wafer) is a well-known technique, and a representative patent for its application, such as the domestic new type M421506 The detection system is electrically connected to an oscilloscope and a power supply for detecting a wafer to be tested, wherein the wafer to be tested is electrically connected to the oscilloscope and the power supply, and the detection system includes a judging device; and a radio wave testing device electrically connected to the judging device for issuing a first command to the oscilloscope The oscilloscope is configured to measure a first electromagnetic wave generated by the wafer to be tested to capture a value of the first electromagnetic wave, and return the wave value to the detection system, so that the determining device is configured according to the The electric wave value determines whether the wafer to be tested is abnormal. Although the patent can be applied to industrial production lines to detect abnormalities in the wafer to be tested; however, the oscilloscope can only provide basic information such as electric wave value, voltage and current, as well as various command functions required to operate the oscilloscope. The code, operation setting information, fault detection mechanism of signal transmission and the identification mechanism between each oscilloscope cannot be provided to the monitoring device in the background, which not only has a certain limit on the detection application on the industrial production line, but also cannot be allowed. Multiple oscilloscopes perform on-line inspections at the same time, so it is impossible to improve the signal detection performance on industrial production lines.

The reason is that the above-mentioned conventional structure is indeed not perfect, and there is still a need for improvement. Furthermore, until now, no product, paper or patent that pre-sets the CAN-BUS communication program to the embedded oscilloscope has been proposed. In view of this, the inventors have actively invested in research and development, and have been continuously researching and designing. , implementation and experiment, and finally have the research and development results of the present invention.

The first object of the present invention is to provide a CAN-BUS communication method and system for an embedded oscilloscope, which mainly pre-forms a CAN BUS communication interface into a mailbox having various data transmission functions and functions, so as to facilitate the user to plan a test fixture. When the CAN BUS mailbox is initialized to detect the state of the signal to be tested, in addition to the quick and effective integrated control of the automatic test fixture and the monitoring device, the flexibility and response of the system can be increased, thereby increasing the overall test system. Analytical ability. The technical means for achieving the first object of the present invention is to write a control program to the oscilloscope. When the oscilloscope system is initialized, the control program will communicate with the communication interface. The (COM-BUS) complex register definition is divided into multiple mailboxes and is in a state of waiting to receive data. The oscilloscope is used to measure the test object to generate a measurement signal, and the measurement signal is processed to generate the data that can be respectively loaded into the corresponding mailbox. The communication interface (CAN-BUS) converts the measurement data and system operation data into packet data in CAN-BUS format, and then transmits the packet data through the control area network (CAN-BUS), and can collect measurement information and Automatically monitor the operating status of the oscilloscope.

A second object of the present invention is to provide a CAN-BUS communication method and system capable of performing multi-line detection operations, and allowing multiple oscilloscopes to perform multi-line inspection operations by using a test fixture and a CAN-BUS communication network. In order to improve the signal detection efficiency of industrial production lines. The technical means for achieving the second object of the present invention is to write a control program to the oscilloscope. When the oscilloscope system is initialized, the control program divides the complex register definition of the communication interface (CAN-BUS) into a plurality of mailboxes and is in a state of waiting to receive data. The oscilloscope is used to measure the test object to generate a measurement signal, and the measurement signal is processed to generate the data that can be respectively loaded into the corresponding mailbox. The communication interface (CAN-BUS) converts the measurement data and system operation data into packet data in CAN-BUS format, and then transmits the packet data through the control area network (CAN-BUS), and can collect measurement information and Automatically monitor the operating status of the oscilloscope. The method further includes a test fixture, a position sensing module, and a monitoring device connected to the communication interface (CAN-BUS) signal through the control area network (CAN-BUS). The position sensing module is triggered by a signal to trigger the embedded oscilloscope when the object to be tested enters the measurement position of the measurement module of the embedded oscilloscope. , allowing the embedded oscilloscope to perform the test The measurement action of the object. When the monitoring device issues an instruction for data transmission request, the communication interface (CAN-BUS) transmits the packet data required in the mailbox to the monitoring device through the control area network (CAN-BUS).

1‧‧‧Test object

10‧‧‧Oscilloscope

11‧‧‧Measurement module

12‧‧‧Central Processing Module

13‧‧‧Display module

14‧‧‧Programmable Gain Amplifier

15‧‧‧Maximum sampling module

16‧‧‧High speed analog/digital converter

17‧‧‧ memory

20‧‧‧Communication interface

21‧‧‧CAN-BUS controller

22‧‧‧CAN-BUS Transceiver

30‧‧‧Control area network

40‧‧‧Monitor

50‧‧‧Test fixture

60‧‧‧ Position Sensing Module

1 is a functional block diagram of a basic implementation architecture of the present invention; FIG. 2 is a functional block diagram of an online detection implementation of the present invention; FIG. 3 is a functional block diagram of a specific implementation architecture of the present invention; .

Figure 5 is a schematic diagram showing the flow of the operation of the system of the present invention.

6 is a schematic diagram of the configuration of data bits of the mailbox of the present invention.

壹. First embodiment

Referring to FIG. 1 and FIG. 4, in order to achieve the first embodiment of the present invention, an embedded oscilloscope 10, a communication interface 20 (CAN-BUS), and a control area network 30 (CAN-BUS) are included. ) and other technical features. Among them, the embedded oscilloscope 10 has a built-in control program. The communication interface 20 (CAN-BUS) contains a complex register. When the embedded oscilloscope 10 system is initialized, the control program divides the complex register definition of the communication interface 20 (CAN-BUS) into a mailbox 23 for temporary data storage, and is in a state of waiting for receiving data. When the embedded oscilloscope 10 measures a test object 1 to generate a measurement signal, the measurement signal is processed to generate the data, and the data includes a measurement data corresponding to the measurement signal and at least one system. Operational information. Then, the control program will measure the capital. The material and system operation data are respectively loaded into the corresponding mailbox 23, and the measurement information and system operation data are converted into the CAN-BUS format packet data by the communication interface 20 (CAN-BUS), and then transmitted through the control area network 30 (CAN). -BUS) Transfer the above packet data.

Specifically, the embedded oscilloscope 10 shown in FIG. 1 includes a measurement module 11 for measuring a test object 1 and generating a measurement signal, and a central processing module for processing the measurement signal. 12. A display module 13 for displaying the measurement signal as measurement information, a programmable gain amplifier 14 for amplifying the measurement signal, and a maximum sampling signal for the measurement signal. The maximum sampling module 15, a high-speed analog/digital converter 16 for converting the measurement signal into a digital signal, and a memory 17 (such as a FIFO register) for storing data.

第二.Second embodiment

Referring to FIG. 1 to FIG. 4, in order to achieve the second embodiment of the present invention, at least one embedded oscilloscope 10, at least one communication interface 20 (CAN-BUS), and a control area network 30 (CAN) are included. -BUS), a monitoring device 40, a test fixture 50, and a position sensing module 60. Among them, the embedded oscilloscope 10 has a built-in control program. The communication interface 20 (CAN-BUS) contains a complex register. When the embedded oscilloscope 10 system is initialized, the control program divides the complex register definition of the communication interface 20 (CAN-BUS) into a mailbox 23 for temporary data storage, and is in a state of waiting for receiving data. On the other hand, the test fixture 50 (such as a conveyor belt, a robot arm or other mechanical transport mechanism) transports the test object 1 to the measurement position of the measurement module 11 of the embedded oscilloscope 10 (ie, with the probe). Position of the contact), when the object to be tested 1 enters the measurement position, the position sensing module 60 triggers the embedded oscilloscope 10 with a signal, so that the embedded oscilloscope 10 performs the object to be tested. The measurement action is performed, and a measurement signal is generated, and then the signal is processed to generate the above data. The above data includes a measurement data corresponding to the measurement signal and at least one system operation data. Then, the control program loads the measurement data and the system operation data into the corresponding mailbox 23, and then converts the measurement data and the system operation data into the packet data of the CAN-BUS format by the communication interface 20 (CAN-BUS). When the monitoring device 40 issues an instruction for data transmission request, the communication interface 20 (CAN-BUS) transmits the packet data in each mailbox 23 to the monitoring device 40 through the control area network 30 (CAN-BUS).

In a more specific embodiment, referring to FIG. 5, when the monitoring device 40 issues an instruction for data transmission request, the communication interface (CAN-BUS) performs instruction interpretation and takes out a system station number data loading. In one of the mailboxes 23, the monitoring device 40 determines whether the system station number data is registered. When the determination result is yes, the control program loads the measurement data and the system operation data into the corresponding mailbox 23, respectively, and The mailbox 23 performs an error detection operation to generate an error check code high bit (MSB) data and an error check code low bit (LSB) data respectively. When the error detection operation result is correct, the error check code high bit is generated. The (MSB) data and the error check code low bit (LSB) data are loaded into the other two mailboxes 23, respectively. Then, the communication interface 20 (CAN-BUS) converts the measurement data, system operation data, system station number data, error check code high bit (MSB) data and error check code low bit (LSB) data in each mailbox 23 The packet data of the above data format is transmitted to the monitoring device 40 through the control area network 30 (CAN-BUS).

Specifically, the system operation data includes instruction function codes (ie, various instruction function codes for operating the oscilloscope) that can be respectively loaded in the six mailboxes 23, and the system operates. Mode selection (ie selection mode for oscilloscope operation), time base unit (ie time unit of basic unit area), trigger base unit (ie basic setting unit of trigger mode), system status code (ie operating state of oscilloscope 10) Test fixture 50 status code (ie, the operating state of the test fixture) and print mode selection (ie, the oscilloscope's print mode selection). Here, it must be added that the communication interface 20 (CAN-BUS) is used to package the above system operation data, measurement data and system registration station number data into a CAN-BUS format (DATA FRAME) packet data. Specifically, the packet data includes one or more system operation data or a serial bit code combined with the measurement data and the system station number data. As for the measurement data, the X-axis basic time base unit high-order element (MSB) data, the X-axis basic time base unit low-order element (LSB) data, and the Y-axis basic time base unit high level which can be respectively loaded in the six letter boxes 23 are included. The element (MSB) data, the Y-axis basic time base unit low-order element (LSB) data, the Z-axis basic time base unit high-order element (MSB) data, and the Z-axis basic time base unit low-order element (LSB) data.

Referring to the communication interface 20 (CAN-BUS) shown in FIG. 3, a CAN-BUS controller 21 and a CAN-BUS 22 transceiver defined with a mailbox 23 are defined. The CAN-BUS21 controller is electrically connected to the embedded oscilloscope 10. One end of the CAN-BUS transceiver 22 is electrically connected to the CAN-BUS controller 21, and the other end is connected to the control area network 30 (CAN-BUS) signal. Of course, the monitoring device 40 is also electrically connected to a communication interface 20 (CAN-BUS), and can collect the measurement data and system operation data of the embedded oscilloscope 10. Specifically, a CAN-BUS controller 21 is electrically connected to the embedded oscilloscope 10 for receiving the measurement data and system operation data transmitted by the embedded oscilloscope 10, and converting the packet data into the CAN-BUS format. One end of a CAN-BUS transceiver 22 It is electrically connected to the CAN-BUS controller 21, and the other end is connected to the control area network 30 (CAN-BUS) signal for loading the packet data transmitted by a CAN-BUS controller 21 to the control area network. High-order transmission line and low-order transmission line of road 30 (CAN-BUS). The two CAN-BUS transceivers 22 are electrically connected to one of the two CAN-BUS controllers 21, and the other end is connected to the control area network 30 (CAN-BUS) signal for receiving the control area network 30 (CAN-BUS). The packet data of the high-order transmission line and the low-order transmission line are transmitted to the two CAN-BUS controllers 21, and the second CAN-BUS controller restores the packet data to the above-mentioned measurement data and system operation data, such that the monitoring device 40 can be used to collect the measurement data and system operation data of each embedded oscilloscope 10 for subsequent use and online detection and monitoring purposes. Since the control area network 30 (CAN-BUS) has the characteristics of two-way and two-line data transmission, when the monitoring device 40 issues an instruction for data format transmission requirements (such as a remote format Remote Transmit Request Frame for remote data), Then, the data transmission step opposite to the above data transmission step is performed.

Please refer to FIG. 4, which is an illustration of the allocation of the mailbox 23 of the present invention. FIG. 6 is a schematic diagram showing the configuration of the data bits of the mailbox 23 of the present invention. As can be seen from FIGS. 4 and 6, the present invention uses a total of 16 sets of mailboxes 23 and defines the mailbox 23 as a different data transfer function, thereby transmitting the measurement signals (such as waveform data) of the object 1 to be measured by the oscilloscope 10. Go out to adopt the passive inquiry mode, and after receiving the instruction, provide relevant information according to the instruction request and send it back to the inquiry end. The CAN BUS of the embedded handheld oscilloscope 10 will separately map the different functions of the mailbox 23 at the beginning of the system, the mailbox 1: the registration station number for the system, the mailbox 2: the command function code, the mailbox 3: the system operation mode selection, the mailbox 4: time base unit, letter box 5: trigger base unit, letter box 6: X-axis basic time base unit data high position unit (MSB), letter box 237: X-axis basic time base Unit Data Low Bit (LSB), Mailbox 8: Y-axis Basic Time Base Unit Data High Bit (MSB), Mailbox 9: Y-axis Basic Time Base Unit Data Low Bit (LSB), Mailbox 10: Z-axis Basic Time Base unit data high bit (MSB), letter box 11: Z axis basic time base unit data low bit (LSB), mailbox 12: system status code, mailbox 13: test fixture 50 system status code, mailbox 14: column Print mode selection, mailbox 15: error check code high bit (MSB), mailbox 16: error check code low bit (LSB).

Reference

The invention has the following features as illustrated by the specific embodiments described above:

1. The invention can be pre-defined as a mailbox with various data transmission functions and functions by the CAN BUS communication interface, so as to facilitate the user to initialize the CAN BUS mailbox to detect the state of the signal to be tested when planning the test fixture, except It can be easily and quickly integrated with automatic test fixtures and monitoring devices, and can increase the flexibility and response of the system to increase the resolution of the overall test system.

2. The invention can indeed carry out multi-line inspection operations, and the test fixture and the CAN-BUS communication network are built, so that multiple oscilloscopes can perform multi-line inspection operations, thereby improving the signal detection performance on the industrial production line.

The above is only a possible embodiment of the present invention, and is not intended to limit the scope of the patents of the present invention, and the equivalent implementations of other changes according to the contents, features and spirits of the following claims should be It is included in the patent of the present invention. The invention is specifically defined in the structural features of the request item, is not found in the same kind of articles, and has practicality and progress, has met the requirements of the invention patent, and has filed an application according to law, and invites the bureau to approve the patent according to law to maintain the present invention. The legal rights of the applicant. On-line signal detection performance.

10‧‧‧Oscilloscope

11‧‧‧Measurement module

12‧‧‧Central Processing Module

13‧‧‧Display module

14‧‧‧Programmable Gain Amplifier

15‧‧‧Maximum sampling module

16‧‧‧High speed analog/digital converter

17‧‧‧ memory

20‧‧‧Communication interface

30‧‧‧Control area network

40‧‧‧Monitor

Claims (10)

A CAN-BUS communication method for an embedded oscilloscope includes: providing at least one embedded oscilloscope and at least one communication interface (CAN-BUS) electrically connected to the embedded oscilloscope, wherein the embedded oscilloscope has a control program built therein The communication interface (CAN-BUS) includes a plurality of registers: when the embedded oscilloscope system is initialized, the control program divides the plurality of register definitions of the communication interface (CAN-BUS) into temporary data for temporary storage. The mailbox is in a state of waiting for receiving data; the embedded oscilloscope generates a measurement signal by measuring a sample to be tested, and the embedded oscilloscope processes the measurement signal to generate the data, and the data includes a corresponding Measuring data and at least one system operation data, and then loading the measurement data and the system operation data into the corresponding mailbox; and using the communication interface (CAN-BUS) to measure the data and the system operation data The packet data is converted into CAN-BUS format, and the packet data is transmitted through a control area network (CAN-BUS). The CAN-BUS communication method of the embedded oscilloscope according to claim 1, further comprising a test fixture and a position sensing module, wherein the test fixture is configured to transport the object to be tested to the embedded oscilloscope a measuring position of the measuring module, when the object to be tested enters the measuring position, the position sensing module triggers the embedded oscilloscope with a signal, so that the embedded oscilloscope executes the amount of the object to be tested Measuring action. The CAN-BUS communication method of the embedded oscilloscope according to claim 1, further comprising a monitoring device connected to the communication interface (CAN-BUS) signal through the control area network (CAN-BUS), when When the monitoring device issues an instruction for data transmission, the communication interface (CAN-BUS) converts the measurement data and the operation data of the system in the mailbox. The packet data is transmitted to the monitoring device. The CAN-BUS communication method of the embedded oscilloscope according to claim 3, wherein when the monitoring device issues an instruction for data transmission request, the communication interface (CAN-BUS) interprets the instruction and takes out a system station number data. Loading in one of the mailboxes, and then the monitoring device determines whether the system station number data is registered. When the determination result is yes, the control program loads the measurement data and the system operation data into the corresponding mailbox respectively. And performing an error detection operation on each of the mailboxes to generate an error check code high bit (MSB) data and an error check code low bit (LSB) data, respectively, when the error detection operation result is no error, then The error check code high bit (MSB) data and the error check code low bit (LSB) data are respectively loaded into the other two mailboxes, and the communication interface (CAN-BUS) further inputs the measurement data in each of the mailboxes. The system operation data, the error check code high bit (MSB) data, and the error check code low bit (LSB) data are converted into the packet data, and transmitted to the monitoring device. The CAN-BUS communication method of the embedded oscilloscope according to claim 1, wherein the system operation data includes an instruction function code, a system operation mode selection, a time base unit, and a trigger base respectively loadable in the six mailboxes. Unit, system status code, test fixture status code, and print mode selection. The measurement data includes X-axis basic time base unit high-order (MSB) data that can be loaded into each of the six mailboxes, X. Axis basic time base unit low bit (LSB) data, Y axis basic time base unit high bit (MSB) data, Y axis basic time base unit low bit (LSB) data, Z axis basic time base unit high bit (MSB) data And the Z-axis basic time base unit low-order (LSB) data. The CAN-BUS communication method of the embedded oscilloscope according to claim 1, wherein the communication interface (CAN-BUS) comprises a CAN-BUS controller and a CAN-BUS transceiver defining the mailbox, the CAN- The BUS controller is electrically connected to the embedded oscilloscope. One end of the CAN-BUS transceiver is electrically connected to the CAN-BUS controller, and the other end is connected to the control area network (CAN-BUS) signal. A CAN-BUS communication system of an embedded oscilloscope, comprising: at least one communication interface (CAN-BUS), comprising a plurality of registers; a control area network (CAN-BUS); and at least one embedded oscilloscope A control program is built in. When the system is initialized, the control program divides the plurality of registers of the communication interface (CAN-BUS) into a mailbox for temporary storage of the plurality of data, and the embedded oscilloscope is used to measure one. A test signal is generated by the test object, and the embedded oscilloscope processes the measurement signal to generate a corresponding measurement data and at least one system operation data, and the control program loads the measurement data and the system operation data respectively. In the corresponding mailbox, the communication interface (CAN-BUS) converts the measurement data and the system operation data into packet data in the CAN-BUS format, and then the packet is transmitted through the control area network (CAN-BUS). The data is transmitted. The CAN-BUS communication system of the embedded oscilloscope according to claim 7, further comprising a test fixture and a position sensing module, wherein the test fixture is configured to transport the object to be tested to the embedded oscilloscope a measuring position of the measuring module, when the object to be tested enters the measuring position, the position sensing module triggers the embedded oscilloscope with a signal, so that the embedded oscilloscope executes the amount of the object to be tested Measuring action. The CAN-BUS communication system of the embedded oscilloscope according to claim 7, further comprising a monitoring device connected to the communication interface (CAN-BUS) signal through the control area network (CAN-BUS), when When the monitoring device issues an instruction for data transmission, the communication interface (CAN-BUS) transmits the packet data required in the mailbox to the monitoring device through the control area network (CAN-BUS). The CAN-BUS communication system of the embedded oscilloscope according to claim 7, wherein The communication interface (CAN-BUS) includes a CAN-BUS controller and a CAN-BUS transceiver defined by the mailbox, and the CAN-BUS controller is electrically connected to the embedded oscilloscope, and the CAN-BUS transceiver end is It is electrically connected to the CAN-BUS controller, and the other end is connected to the control area network (CAN-BUS) signal.