Digital sensor simulation instrument and digital sensor simulation system comprising same

Abstract

The utility model relates to the technical field of embedded application, and discloses a digital sensor simulation instrument and a digital sensor simulation system comprising the same, the simulation instrument comprises an MCU control board card, a bus mother board and a plurality of sensor simulation control board cards; the MCU control board card, the bus mother board and the sensor simulation control board cards are sequentially connected in series through a data bus, and the plurality of sensor simulation control board cards are connected in parallel; wherein the MCU control board card is used for generating a control signal according to a simulation signal sent by the digital sensor simulation control work station, sending the control signal and the simulation signal to the bus mother board, and sending a simulation result to the digital sensor simulation control work station; the bus mother board is used for sending a simulation signal to the corresponding sensor simulation control board card according to the control signal; and the sensor simulation control board card is used for performing simulation according to the simulation signal. Through series connection and parallel connection of data buses, inter-module communication and multi-channel parallel simulation are realized.

Description

Technical Field

[0001] This utility model relates to the field of embedded application technology, and in particular to a digital sensor simulator and a digital sensor simulation system including the same. Background Technology

[0002] Existing technologies primarily utilize digital DAC / ADC technology in embedded control systems, combined with sensor characteristics, to design digital sensor simulation environments and instruments. Specifically, the corresponding sensor characteristics are designed using the DAC (digital-to-analog converter) function of the embedded control chip, and then the sensor characteristics are verified using ADC (analog-to-digital converter) measurement technology, thereby achieving sensor simulation.

[0003] However, with the increasing demand for digital sensor simulation, the number of digital sensor simulations required at the same time is also increasing. However, the sensor state is limited by the conditions of the measured sample and is difficult to adjust randomly in real time. In practical applications, various scenarios need to be created, so there is an urgent need for a digital sensor simulation method. Utility Model Content

[0004] The purpose of this invention is to provide a digital sensor simulator and a digital sensor simulation system including the same, which solves the problems of difficulty in quickly adjusting during sensor simulation and the inability to simultaneously simulate communication between multiple sensors.

[0005] To address the aforementioned technical problems, this utility model provides a digital sensor simulator, which includes at least an MCU control board, a bus motherboard, and several sensor simulation control boards. The MCU control board, the bus motherboard, and the sensor simulation control boards are connected in series via a data bus, and the several sensor simulation control boards are connected in parallel. The MCU control board is used to generate control signals based on simulation signals sent by a digital sensor simulation control workstation, and to send the control signals and simulation signals to the bus motherboard, as well as to send the simulation results generated by the sensor simulation control boards to the digital sensor simulation control workstation. The bus motherboard is used to send the simulation signals to the corresponding sensor simulation control boards based on the control signals. The sensor simulation control boards are used to perform simulations based on the simulation signals.

[0006] The present invention also provides a digital sensor simulation system, which includes a digital sensor simulator as described above, and a digital sensor simulation control workstation connected to the digital sensor simulator for sending simulation signals to the digital sensor simulator and receiving simulation results generated by the simulation signals.

[0007] Compared to existing technologies, this invention achieves efficient sensor simulation functionality through a modular architecture, specifically employing a combination design of an MCU control board, a bus motherboard, and several sensor simulation control boards. The MCU control board receives simulation signals from the simulation control workstation, generates control signals and transmits them to the bus motherboard, while simultaneously receiving and sending simulation results, thus achieving centralized signal management and control. The bus motherboard, as the core signal distribution channel, efficiently transmits simulation signals to the corresponding sensor simulation control boards based on the control signals, ensuring the orderliness and accuracy of signal transmission. Each sensor simulation control board possesses independent simulation capabilities, enabling it to perform corresponding sensor simulation operations based on received simulation signals and generate simulation results. Through serial and parallel connections of the data bus, the system achieves efficient inter-module communication and multi-channel parallel simulation capabilities, while also providing technical support for the flexible expansion of sensor simulation.

[0008] In addition, the MCU control board includes a control chip; wherein the control chip is used to generate control signals based on the simulation signals sent by the digital sensor simulation control workstation, send the simulation signals and control signals to the bus motherboard through the DIO interface, and send the standard constant current source generated by itself and the simulation results collected by the sensor simulation control board to the digital sensor simulation control workstation.

[0009] In addition, the MCU control board also includes a conversion chip and a file management chip; the control chip is connected to the conversion chip and the file management chip respectively; wherein, the conversion chip is used to convert the UART interface of the control chip into a USB communication interface, and connects to the digital sensor simulation control workstation through the USB communication interface to receive the simulation signal and send the simulation result; the file management chip is used to convert the UART interface of the control chip into a USB flash drive read / write interface, and connects to an external storage device through the USB flash drive read / write interface to send the simulation result.

[0010] In addition, the data bus includes: a simulation sensor control board selection line and a time-sharing operation control line; wherein, both the simulation sensor control board selection line and the time-sharing operation control line are connected between the DIO interface of the control chip of the MCU control board and the bus motherboard, and are also connected between the sensor simulation control board and the bus motherboard; wherein, the simulation sensor control board selection line is used to select the sensor simulation control board for simulation according to the control signal; the time-sharing operation control line is used to control the simulation sequence of the sensor simulation control board according to the control signal. Thus, by employing a data bus design consisting of a simulation sensor control board selection line and a time-sharing operation control line, precise control of multiple sensor simulation control boards is achieved through these control lines. The simulation sensor control board selection line is responsible for selecting a specific sensor simulation control board from the MCU control board for simulation according to the control signal, while the time-sharing operation control line controls the simulation sequence according to the control signal, ensuring the orderly execution of the simulation process. This design effectively solves the scheduling problem of multi-sensor simulation tasks, enabling the system to activate different sensor simulation boards at different time periods, avoiding signal conflicts and resource contention.

[0011] In addition, the data bus includes at least four time-sharing operation control lines and eight simulation sensor control board selection lines.

[0012] In addition, the sensor simulation control board includes a bus interface, a relay matrix, and a sensor; wherein the bus interface, the relay matrix, and the sensor are connected in series; the bus interface is connected to the bus motherboard based on the data bus and is used to receive the simulation control signal to send the simulation result; the relay matrix is ​​used to output sensor control signals according to the simulation signal; the sensor is used to perform simulation according to the sensor control signal.

[0013] In addition, the sensor simulation control board is a 32-channel digital sensor control operation board; the sensor is a 32-channel digital sensor.

[0014] In addition, the relay matrix is ​​a 96 magnetic latching relay matrix.

[0015] In addition, the digital sensor simulation control workstation is a PC-based digital sensor simulation control workstation. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a digital sensor simulator according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of an MCU control board according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a sensor simulation control board according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a digital sensor simulation system according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed in the claims of this utility model can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0022] One embodiment of this utility model relates to a digital sensor simulator, such as... Figure 1 As shown.

[0023] The digital sensor simulator includes at least an MCU (Microcontroller Unit) control board 101, a bus motherboard, and several sensor simulation control boards. The MCU control board 101, the bus motherboard, and the sensor simulation control boards are connected in series via a data bus, and the several sensor simulation control boards are connected in parallel. The MCU control board 101 is used to generate control signals based on simulation signals sent by the digital sensor simulation control workstation, and to send the control signals and the simulation signals to the bus motherboard, as well as to send the simulation results generated by the sensor simulation control boards to the digital sensor simulation control workstation. The bus motherboard is used to send the simulation signals to the corresponding sensor simulation control boards based on the control signals. The sensor simulation control boards are used to perform simulations based on the simulation signals.

[0024] It should be noted that the digital sensor emulator is a multi-channel digital sensor emulator, which can be flexibly configured into various types, levels and forms of 32 (any one of 64, 96, 128, 160, 192, 224 or 256) channel digital sensor emulators according to actual application needs.

[0025] Thus, a modular architecture is used to achieve efficient sensor simulation functionality, specifically employing a combination design of an MCU control board 101, a bus motherboard 102, and several sensor simulation control boards (103 to 106). The MCU control board 101 receives simulation signals from the simulation control workstation, generates control signals and transmits them to the bus motherboard, while simultaneously receiving and sending simulation results, achieving centralized signal management and control. The bus motherboard, as the core signal distribution channel, efficiently transmits simulation signals to the corresponding sensor simulation control boards based on the control signals, ensuring the orderliness and accuracy of signal transmission. Each sensor simulation control board has independent simulation capabilities, able to perform corresponding sensor simulation operations based on the received simulation signals and generate simulation results. Through serial and parallel connections of the data bus, the system achieves efficient inter-module communication and multi-channel parallel simulation capabilities, while also providing technical support for flexible expansion of sensor simulation.

[0026] To facilitate better understanding by those skilled in the art Figure 1 The structure of the digital sensor simulator shown below will be further explained.

[0027] In some embodiments, the specific structure of the MCU control board 101 can also be as follows: Figure 2 As shown, it includes the following components:

[0028] The MCU control board 101 includes at least a control chip 201; wherein, the control chip 201 is used to generate control signals according to the simulation signals sent by the digital sensor simulation control workstation, send the simulation signals and control signals to the bus motherboard through the DIO (Digital Input / Output) interface 204, and send the standard constant current source generated by itself and the simulation results collected by the sensor simulation control board to the digital sensor simulation control workstation.

[0029] Specifically, the control chip 201 can be an embedded STM32F407 control chip, and the MCU control board 101 is a main controller designed based on the embedded STM32F407 control chip. The DIO interface 204 of the embedded STM32F407 control chip is connected to the bus motherboard 102 of the digital sensor simulator via a data bus, thereby enabling the bus motherboard to connect to the MCU main control board 101 of the digital sensor simulator. The embedded STM32F407 control chip performs signal acquisition and testing through its ADC (Analog-to-Digital Converter) interface 205. By combining the selection and combination of each channel of the multi-channel analog circuit, the simulation results of the sensor simulation control board are collected according to the sensor simulation measurement requirements, and the simulation results are sent to the digital sensor simulation control workstation via a USB communication interface. The embedded STM32F407 control chip also uses its DAC (Digital-to-Analog Converter) interface 206, combined with operational amplifiers and other circuits, and simulates channel switching circuits to design multiple constant current sources to achieve standard output constant current sources. By using standard constant current sources and simulation results, the correctness of the control operation application of various types of digital sensors in the digital sensor simulator of the digital sensor simulation control workstation can be verified.

[0030] In this way, bidirectional transmission of simulation and control signals is achieved through the DIO interface 204. The control chip 201 generates corresponding control signals based on the simulation signals from the digital sensor simulation control workstation and sends these signals to the bus motherboard via the DIO interface 204, ensuring the accuracy and efficiency of signal transmission. Furthermore, the control chip 201 can also generate standard measurement signals (such as constant current source signals) and send them back to the simulation control workstation along with the simulation results acquired from the sensor simulation control board. This design allows the MCU control board 101 to not only coordinate signal transmission but also independently generate necessary test signals, supporting precise measurements during the simulation process. Through such integrated control, the system can achieve precise scheduling of simulation tasks and real-time data feedback, thereby improving simulation efficiency and accuracy.

[0031] The MCU control board 101 further includes at least a conversion chip 202 and a file management chip 203; the control chip 201 is connected to the conversion chip 202 and the file management chip 203 respectively; wherein, the conversion chip 202 is used to convert the UART (Universal Asynchronous Receiver / Transmitter) interface of the control chip 201 into a USB communication interface, and connects to the digital sensor simulation control workstation through the USB communication interface to receive the simulation signal and send the simulation result; the file management chip 203 is used to convert the UART interface of the control chip 201 into a USB flash drive read / write interface, and connects to an external storage device through the USB flash drive read / write interface to send the simulation result.

[0032] Specifically, the embedded STM32F407 control chip is designed as a USB communication interface via its UART interface; the UART interface of the embedded STM32F407 control chip is designed as a USB flash drive read / write interface; the embedded STM32F407 control chip is connected to the bus motherboard of the digital sensor emulator via DIO interface 204. The conversion chip 202 is a CH-340N interface circuit, which converts the UART interface of the embedded STM32F407 chip into a USB communication interface. This interface is used to connect to the digital sensor emulator control workstation to realize the operation and control of the digital sensor emulator. The file management chip 203 is a CH376H interface circuit, which converts the UART interface of the embedded chip into a USB flash drive read / write interface. This interface is used to connect to an external storage device, thereby realizing the storage of application data for operation and control on the emulator, and the retrieval of data saved by external devices for reuse by the digital sensor emulator.

[0033] Thus, by integrating the conversion chip 202 and the file management chip 203, flexible communication and data storage capabilities are provided. The conversion chip 202 converts the UART interface of the control chip 201 into a USB communication interface, enabling the MCU control board 101 to efficiently transmit data with the digital sensor simulation control workstation via the USB communication interface, receiving simulation signals and sending simulation results. Simultaneously, the file management chip 203 converts the UART interface into a USB flash drive read / write interface, supporting the storage and transmission of simulation results via a USB flash drive connected to an external storage device. This design not only improves the flexibility of data transmission and ensures compatibility between the system and different external devices, but also provides a convenient data storage and backup solution. Through this multi-interface implementation, the system can simultaneously meet the needs of real-time data transmission and long-term data storage, making the simulation process more efficient and stable, while also facilitating subsequent data management and analysis.

[0034] In this invention, the MCU control board 101, the bus motherboard 102, and the sensor simulation control board are connected in series via a data bus; in some embodiments, the data bus may include the following components:

[0035] The data bus 102 includes: a simulation sensor control board selection line and a time-division operation control line; wherein, the simulation sensor control board selection line and the time-division operation control line are both connected between the DIO interface 204 of the control chip 201 of the MCU control board 101 and the bus motherboard 102, and are both connected between the sensor simulation control board and the bus motherboard 102; wherein, the simulation sensor control board selection line is used to select the sensor simulation control board for simulation according to the control signal; the time-division operation control line is used to control the simulation sequence of the sensor simulation control board according to the control signal.

[0036] Specifically, the bus motherboard 102 can be the connection bus between the MCU main control board of the digital sensor simulator and multiple digital sensor control boards. In addition to the above, the bus motherboard 102 also includes the power supply line of the digital sensor simulator. The bus motherboard 102 includes at least four time-sharing operation control lines and eight selection lines for the simulation sensor control board, specifically a 12-bit data bus DA (11-0); 32-channel digital sensor control board time-sharing operation control lines ABCD (a total of four control lines); and a multi-channel digital sensor control board selection line E (7-0) (a total of eight control lines). This enables time-sharing control of each multi-channel digital sensor control board, constructing a multi-channel simulation sensor implementation function to adapt to the simulation needs of different types, levels, and numbers of channels (any of 32, 64, 96, 128, 160, 192, 224, or 256 channels) from multiple dimensions. Furthermore, the digital sensor simulator expands the number of control operations for the 32-channel digital sensor control board by using time-division control of the selection line E(7-0), enabling the "digital sensor simulator" to control 256-channel digital sensors. Through the 12-bit data of DA(11-0), digital sensor characteristic design is achieved, enabling multi-station simulation of the sensor and ensuring the accuracy of the sensor simulation curves.

[0037] Thus, by employing a data bus design consisting of a simulation sensor control board selection line and a time-sharing operation control line, precise control of multiple sensor simulation control boards is achieved through these control lines. The simulation sensor control board selection line is responsible for selecting a specific sensor simulation control board from the MCU control board 101 for simulation based on the control signal, while the time-sharing operation control line controls the simulation sequence according to the control signal, ensuring the orderly execution of the simulation process. This design effectively solves the scheduling problem of multi-sensor simulation tasks, enabling the system to activate different sensor simulation boards at different times, avoiding signal conflicts and resource contention.

[0038] In some embodiments, the specific structure of the sensor simulation control board of the digital sensor simulator can also be as follows: Figure 3 As shown, it includes the following components:

[0039] The sensor simulation control board includes a bus interface 301, a relay matrix 302, and a sensor 303; wherein the bus interface 301, the relay matrix 302, and the sensor 303 are connected in series; the bus interface 301 is connected to the bus motherboard based on the data bus and is used to receive the simulation control signal to send the simulation result; the relay matrix 302 is used to output sensor control signals according to the simulation signal; the sensor is used to perform simulation according to the sensor control signal.

[0040] The sensor simulation control board can be a 32-channel digital sensor control operation board; the sensor 303 is a 32-channel digital sensor. The relay matrix 302 can be a 96-magnetic latching relay matrix.

[0041] Specifically, the sensor simulation control board connects to the data bus of the bus motherboard via bus interface 301. Bus interface 301 drives and controls the multi-channel digital sensor control board selection line E (7-0) to select the digital sensor control board. Bus interface 301 drives and controls the time-sharing operation control line ABCD to select the time-sharing operation, further driving and controlling the 96 magnetic latching relay matrix to perform time-sharing operation, thereby realizing the state control of the 96 magnetic latching relay matrix. In this way, the selection control by the multi-channel digital sensor control board selection line E (7-0), the ABCD time-sharing operation control, and the relay matrix 302 state drive control DA (11-0) form a combined control to output sensor control signals, enabling the 32-channel digital sensor simulation. The final digital sensor simulation signal is output through a standard interface.

[0042] Another embodiment of this utility model relates to a digital sensor simulation system, such as... Figure 4 As shown.

[0043] The system includes a digital sensor simulation control workstation and a digital sensor simulator; the digital sensor simulation control workstation and the digital sensor simulator are connected; wherein, the digital sensor simulation control workstation is used to send simulation signals to the digital sensor simulator; the digital sensor simulator is used to generate simulation results based on the simulation signals and send them to the digital sensor simulation control workstation.

[0044] Specifically, the digital sensor simulation system consists of two parts: a digital sensor emulator and a digital sensor simulation control workstation. The digital sensor emulator comprises an embedded control board (which can be an embedded STM32F407 controller), multiple digital sensor simulation control operation boards (which can form a 32 (64 / 96 / 128 / 160 / 192 / 224 / 256) channel digital sensor simulation control operation board), and a bus motherboard. The PC-based digital sensor simulation control workstation connects to the digital sensor emulator via a USB communication interface and is used to operate and control the digital sensor emulator.

[0045] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0046] It should be noted that in the description of this embodiment, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" or "many" means at least two.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this embodiment. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

[0049] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A digital sensor simulator, characterized in that, The digital sensor simulator includes at least an MCU control board, a bus motherboard, and several sensor simulation control boards. The MCU control board, the bus motherboard, and the sensor simulation control board are connected in series via a data bus, and the plurality of sensor simulation control boards are connected in parallel; wherein... The MCU control board is used to generate control signals based on the simulation signals sent by the digital sensor simulation control workstation, and send the control signals and the simulation signals to the bus motherboard, as well as send the simulation results generated by the sensor simulation control board to the digital sensor simulation control workstation. The bus motherboard is used to send the simulation signal to the corresponding sensor simulation control board according to the control signal; The sensor simulation control board is used to perform simulation based on the simulation signal.

2. The digital sensor simulator according to claim 1, characterized in that, The MCU control board includes a control chip; wherein... The control chip is used to generate control signals based on the simulation signals sent by the digital sensor simulation control workstation, send the simulation signals and the control signals to the bus motherboard through the DIO interface, and send the standard constant current source it generates and the simulation results collected from the sensor simulation control board to the digital sensor simulation control workstation.

3. The digital sensor simulator according to claim 2, characterized in that, The MCU control board also includes a conversion chip and a file management chip; the control chip is connected to both the conversion chip and the file management chip. The conversion chip is used to convert the UART interface of the control chip into a USB communication interface, and connects to the digital sensor simulation control workstation through the USB communication interface to receive the simulation signal and send the simulation result; The file management chip is used to convert the UART interface of the control chip into a USB flash drive read / write interface, and connect to an external storage device through the USB flash drive read / write interface to send the simulation results.

4. The digital sensor simulator according to claim 1, characterized in that, The data bus includes: The simulation sensor control board includes selection lines and time-sharing operation control lines; among them... The selection line of the simulation sensor control board and the time-division operation control line are both connected between the MCU control board and the bus motherboard, and also between the sensor simulation control board and the bus motherboard; wherein, The simulation sensor control board selection line is used to select the sensor simulation control board for simulation according to the control signal. The time-sharing operation control line is used to control the simulation sequence of the sensor simulation control board according to the control signal.

5. The digital sensor simulator according to claim 4, characterized in that, The data bus includes at least four time-sharing operation control lines and eight simulation sensor control board selection lines.

6. The digital sensor simulator according to claim 1, characterized in that, The sensor simulation control board includes a bus interface, a relay matrix, and sensors; wherein... The bus interface, the relay matrix, and the sensor are connected in sequence. The bus interface is connected to the bus motherboard based on the data bus, and is used to receive the simulation control signal in order to send the simulation results; The relay matrix is ​​used to output sensor control signals based on the simulation signals; The sensor is used to perform simulation based on the sensor control signal.

7. The digital sensor simulator according to claim 1, characterized in that, The sensor simulation control board is a 32-channel digital sensor control operation board; the sensor is a 32-channel digital sensor.

8. The digital sensor simulator according to claim 6, characterized in that, The relay matrix is ​​a 96 magnetic latching relay matrix.

9. A digital sensor simulation system, characterized in that, The digital sensor simulation system includes a digital sensor simulator as described in any one of claims 1 to 8, and the digital sensor simulation system further includes: A digital sensor simulation control workstation is connected to the digital sensor simulator and is used to send simulation signals to the digital sensor simulator and receive simulation results generated by the simulation signals.

10. The digital sensor simulation system according to claim 9, characterized in that, The digital sensor simulation control workstation is a PC-based digital sensor simulation control workstation.

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