CN221946484U - Magnetic sensor communication system - Google Patents
Magnetic sensor communication system Download PDFInfo
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- CN221946484U CN221946484U CN202323655654.1U CN202323655654U CN221946484U CN 221946484 U CN221946484 U CN 221946484U CN 202323655654 U CN202323655654 U CN 202323655654U CN 221946484 U CN221946484 U CN 221946484U
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Abstract
The utility model discloses a magnetic sensor communication system, which comprises a central processing unit, a level adaptation circuit, an electromagnetic isolation circuit and a power supply module, wherein the level adaptation circuit is connected with the central processing unit; the central processing unit is connected with the electromagnetic isolation circuit and can be connected with the target chip through the level adaptation circuit; the first end of the level adapting circuit is connected with the central processing unit and used for acquiring a first level signal of the central processing unit; the second end of the level adapting circuit is connected with the target chip and used for acquiring a second level signal of the target chip; the level adapting circuit carries out adapting processing on the acquired first level signal and the second level signal. The magnetic sensor communication system provided by the utility model can improve the convenience of connection and communication with the chip, meet the communication programming requirement of a user on the chip at any time and any place, reduce the cost and improve the working efficiency of the user.
Description
Technical Field
The utility model belongs to the technical field of electronic communication, relates to a communication system, and particularly relates to a magnetic sensor communication programming system.
Background
The programmers in the market at present are mainly divided into multifunctional general-purpose programmers, mass-production programmers and special-purpose programmers according to functional purposes. The special programmer is low in price, is applicable to a small number of chip types, mainly meets the programming requirement of a certain chip or a certain type of chip, and mainly is a programmer which is developed by each chip manufacturer and only comprises a self-contained chip communication protocol. The chips with different models are required to be burnt, and the chips can be used only by replacing different daughter boards and switching the upper computer software with the corresponding models, so that the method is very inconvenient.
Mass production type programmers often use the stability of the programmer itself as a main requirement, and perform continuous, rapid and massive programming work on a single type chip. The programmer belongs to the category of production equipment and is developed by customization. The multifunctional universal programmer is a mainstream product in the market at present, can be applied to various different types of chips, and can program thousands of different chips through operating software for research and development personnel, so that the application range is wide, but the selling price is high. The system has the advantages that the volume of the system is not too small due to the too wide compatibility, the purpose of convenient carrying is difficult to achieve, and a large amount of preliminary setting preparation work is needed for software and hardware before each use so as to be normally used; therefore, for the magnetic sensor industry, no tool which is compatible with various sensor chips and general communication modes, small in size, convenient to use and low in price exists at present.
In view of this, there is an urgent need to design a new communication system so as to overcome at least some of the above-mentioned drawbacks of the existing communication systems.
Disclosure of utility model
The utility model provides a magnetic sensor communication system, which can improve the compatibility and convenience of connection communication with a chip, meet the communication programming requirement of a user on the chip anytime and anywhere, reduce the cost and improve the working efficiency of the user.
In order to solve the technical problems, according to one aspect of the present utility model, the following technical scheme is adopted:
A magnetic sensor communication system, the magnetic sensor communication system comprising: the device comprises a central processing unit, a level adapting circuit, an electromagnetic isolation circuit and a power supply module;
The central processing unit is connected with the electromagnetic isolation circuit and can be connected with the target chip through the level adaptation circuit;
The power supply module is respectively connected with the central processing unit, the level adapting circuit and the electromagnetic isolation circuit and provides electric energy required by work for the power supply module;
the first end of the level adapting circuit is connected with the central processing unit and used for acquiring a first level signal of the central processing unit; the second end of the level adapting circuit is connected with the target chip and used for acquiring a second level signal of the target chip; the level adapting circuit carries out adapting processing on the acquired first level signal and the second level signal.
As one embodiment of the present utility model, the magnetic sensor communication system further includes a digital-to-analog converter, a first analog-to-digital converter, a second analog-to-digital converter, a first amplifier, a second amplifier, and a current sampling resistor;
The input end of the digital-to-analog converter is connected with the output end of the central processing unit, and the output end of the digital-to-analog converter is connected with the input end of the first amplifier; the output end of the first amplifier is connected with the first end of the current sampling resistor, and the second end of the current sampling resistor is used for being connected with the target chip;
The non-inverting input end of the second amplifier is connected with the second end of the current sampling resistor, and the inverting input end of the second amplifier is connected with the first end of the current sampling resistor; the output end of the second amplifier is connected with the input end of the first analog-to-digital converter, and the output end of the first analog-to-digital converter is connected with the input end of the central processing unit;
The input end of the second analog-to-digital converter is connected with the second end of the current sampling resistor, and the output end of the second analog-to-digital converter is connected with the central processing unit.
As one embodiment of the present utility model, the level adaptation circuit includes a third amplifier, a first not gate, a second not gate, a third not gate, a fourth not gate, a fifth not gate, and a sixth not gate;
The second end of the first NOT gate is respectively connected with the input end of the third amplifier and the input end of the second NOT gate; the output end of the third amplifier is connected with the third end of the fifth NOT gate; the output end of the second NOT gate is connected with the third end of the fourth NOT gate;
The input end of the third NOT gate is connected with the central processing unit and the output end of the fifth NOT gate, and the output end of the third NOT gate is connected with the input end of the fourth NOT gate; the output end of the fourth NOT gate is connected with the input end of the sixth NOT gate and the target chip; the output end of the sixth NOT gate is connected with the input end of the fifth NOT gate;
The third NOT gate and the fourth NOT gate form in-phase output from the end A to the end B; the fifth NOT gate and the sixth NOT gate form in-phase output from the end B to the end A; the first NOT gate controls the enabling of the fourth NOT gate and the fifth NOT gate in a mode of controlling the third amplifier and the second NOT gate to form opposite logic, so that the function of controlling the data transmission direction is achieved.
As one embodiment of the present utility model, a communication bus is connected between the cpu and the level adaptation circuit.
As an embodiment of the present utility model, the communication bus includes IIC bus, SPI bus, CAN bus, send bus, and OWI bus.
As one embodiment of the present utility model, the magnetic sensor communication system further includes a hardware I/O interface connected to the target chip through a level adaptation circuit.
As one implementation mode of the utility model, the CPU can be connected with the USB interface through the electromagnetic isolation circuit and connected with the computer through the USB connecting wire.
As one implementation mode of the utility model, the power supply module comprises a DC-DC circuit and a linear voltage stabilizing circuit, wherein the USB interface is connected with the DC-DC circuit through an electromagnetic isolation circuit, and the linear voltage stabilizing circuit is connected with the DC-DC circuit and is a post-stage power supply circuit of the DC-DC circuit.
As one embodiment of the present utility model, the magnetic sensor communication system further includes a USB interface, and the electromagnetic isolation circuit is connected to the computer through the USB interface.
The utility model has the beneficial effects that: the magnetic sensor communication system provided by the utility model can improve the compatibility and convenience of connection communication with the chip, meet the communication programming requirement of a user on the chip at any time and any place, reduce the cost and improve the working efficiency of the user.
In a use scene of the utility model, the utility model greatly reduces the volume, increases the convenience and portability and greatly reduces the cost of the system by multiplexing the power supply and the communication mode of the USB interface. The utility model uses the circuit of DAC and amplifier combination, through the matching of MCU
The chip power supply scheme can be simplified, the wide power supply high-speed signal conversion chip is matched, the compatibility of the magnetic sensor chip is expanded, the communication programming requirement of a user on the chip at any time and any place is greatly met, so that the user can acquire the chip parameters more conveniently, modify the chip parameters to better fit the use requirement of the user, and the work efficiency of the user is improved.
Drawings
Fig. 1 is a schematic diagram illustrating a communication system of a magnetic sensor according to an embodiment of the present utility model.
FIG. 2 is a schematic diagram of another embodiment of a magnetic sensor communication system according to the present utility model.
Fig. 3 is a circuit diagram of a level adaptation circuit according to an embodiment of the utility model.
Fig. 4 is a control flow chart of a magnetic sensor communication system according to an embodiment of the present utility model.
Detailed Description
Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
For a further understanding of the present utility model, preferred embodiments of the utility model are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the utility model, and are not limiting of the claims of the utility model.
The description of this section is intended to be illustrative of only a few exemplary embodiments and the utility model is not to be limited in scope by the description of the embodiments. It is also within the scope of the description and claims of the utility model to interchange some of the technical features of the embodiments with other technical features of the same or similar prior art.
"Connected" in the specification includes both direct and indirect connections, such as through some active, passive, or electrically conductive medium; connections through other active or passive devices, such as through switches, follower circuits, etc. circuits or components, may be included as known to those skilled in the art, on the basis of achieving the same or similar functional objectives.
The utility model discloses a magnetic sensor communication system, and fig. 1 and 2 are schematic diagrams of the composition of the magnetic sensor communication system in an embodiment of the utility model; referring to fig. 1 and 2, the magnetic sensor communication system includes: the device comprises a central processing unit 1, an electromagnetic isolation circuit 2, a level adaptation circuit 3 and a power supply module 4.
The CPU 1 is connected with the electromagnetic isolation circuit 2, and the CPU 1 can be connected with the target chip 20 through the level adaptation circuit 3; the power module 4 is respectively connected with the central processing unit 1, the electromagnetic isolation circuit 2 and the level adaptation circuit 3, and provides electric energy required by work for the power module.
The first end of the level adapting circuit 3 is connected with the central processing unit 1 and is used for acquiring a first level signal of the central processing unit 1; the second end of the level adapting circuit 3 is connected with the target chip 20 and is used for obtaining a second level signal of the target chip 20; the level adaptation circuit 3 performs an adaptation process on the acquired first level signal and second level signal.
As shown in fig. 1 and 2, in an embodiment of the present utility model, the magnetic sensor communication system further includes a digital-to-analog converter 6, a first analog-to-digital converter 7, a second analog-to-digital converter 8, a first amplifier 9, a second amplifier 10, and a current sampling resistor 11.
The input end of the digital-to-analog converter 6 is connected with the output end of the central processing unit 1, and the output end of the digital-to-analog converter 6 is connected with the input end of the first amplifier 9; the output end of the first amplifier 9 is connected to a first end of a current sampling resistor 11, and a second end of the current sampling resistor 11 is connected to the target chip 20.
The non-inverting input end of the second amplifier 10 is connected with the second end of the current sampling resistor 11, and the inverting input end of the second amplifier 10 is connected with the first end of the current sampling resistor 11; the output end of the second amplifier 10 is connected with the input end of the first analog-to-digital converter 7, and the output end of the first analog-to-digital converter 7 is connected with the input end of the central processing unit 1. The input end of the second analog-to-digital converter 8 is connected with the second end of the current sampling resistor 11, and the output end of the second analog-to-digital converter 8 is connected with the central processing unit 1.
FIG. 3 is a schematic circuit diagram of a level adaptation circuit according to an embodiment of the utility model; referring to fig. 3, in an embodiment of the present utility model, the level adaptation circuit 3 includes a third amplifier 31, a first not gate 32, a second not gate 33, a third not gate 34, a fourth not gate 35, a fifth not gate 36 and a sixth not gate 37.
The second end of the first NOT gate 32 is connected with the input end of the third amplifier 31 and the input end of the second NOT gate 33 respectively; the output end of the third amplifier 31 is connected with the third end of the fifth NOT gate 36; the output of the second not gate 33 is connected to the third terminal of the fourth not gate 35. The input end of the third NOT gate 34 is connected with the output ends of the central processing unit 1 and the fifth NOT gate 36, and the output end of the third NOT gate 34 is connected with the input end of the fourth NOT gate 35; the output end of the fourth NOT gate 35 is connected with the input end of the sixth NOT gate 37 and the target chip; the output of the sixth not gate 37 is connected to the input of the fifth not gate 36. The third NOT gate and the fourth NOT gate form in-phase output from the end A to the end B; the fifth NOT gate and the sixth NOT gate form in-phase output from the end B to the end A; the first NOT gate controls the enabling of the fourth NOT gate and the fifth NOT gate in a mode of controlling the third amplifier and the second NOT gate to form opposite logic, so that the function of controlling the data transmission direction is achieved.
A communication bus is connected between the central processing unit 1 and the level adaptation circuit 3. The communication bus comprises an IIC bus, an SPI bus, a CAN bus, a SENT bus and a OWI bus.
The magnetic sensor communication system further comprises a hardware I/O interface 5, said hardware I/O interface 5 being connected to the target chip 20 via a level adaptation circuit 3.
The central processing unit 1 can be connected with a computer 19 through an electromagnetic isolation circuit 2. The magnetic sensor communication system further comprises a USB interface 12, and the CPU 1 can be connected with the USB interface 12 through the electromagnetic isolation circuit 2 and connected with the computer 19 through a USB connecting wire.
In an embodiment, the power module 4 includes a DC-DC circuit 41 and a linear voltage stabilizing circuit 42, the USB interface 12 is connected to the DC-DC circuit 41 through the electromagnetic isolation circuit 2, and the linear voltage stabilizing circuit 42 is connected to the DC-DC circuit 41 and is a post-stage power circuit of the DC-DC circuit 41.
In one use scenario of the present utility model, the power input interface and power module provide a stable and reliable energy input for the entire test system. The input uses the 5V power that the USB interface provided to add the portability of reserve, through DC-DC boost circuit rectification filtering to 9V direct current power access system, use high accuracy, high stability's LDO to turn into the required voltage of later stage circuit respectively with 9V direct current power, for example: and 7.0V, 5.0V, 3.3V and other direct current power supplies are used for related devices in the system.
The combined circuit comprising the DAC and the operational amplifier in the design of the power supply module can realize the power supply of any voltage of the chip to be programmed, and the compatibility of the system is improved. Meanwhile, a current measuring sampling resistor is added into an output circuit at the rear end of the operational amplifier, so that the current condition of an external chip to be measured can be detected in real time, and the correctness of the chip in the communication operation process is ensured. Because the current value of the sensor chip to be measured is generally smaller, the resistance value of the current sampling resistor needs to be increased so as to ensure enough signal voltage to reduce nonlinear errors caused by ADC acquisition. The current design uses a 10 omega sampling resistor on the premise of ensuring about 10mA current, the differential pressure between two ends of the sampling resistor is about 100mV, the signal is sent to an input stage of a precision instrument amplifier for 20 times of amplification, and finally a voltage signal about 2V is obtained, and the signal can be collected by an ADC in a system and is calculated to obtain the current value of the chip to be tested in actual operation. Considering that the current detection circuit can influence the power supply voltage of the chip to be detected, especially has larger influence on the chip which is output as an analog signal and the analog signal can fluctuate along with the power supply of the chip, one path of ADC acquisition channel in the system is connected into the VCC port of the chip to acquire the power supply voltage of the chip and feeds the data back to the central processing unit, and after the central processing unit processes the data to calculate the compensation voltage, the voltage value output by the operational amplifier end is regulated in a DAC (digital-to-analog converter) control mode, so that the accuracy of the voltage value of the VCC port of the chip to be detected is ensured.
The central processing unit mainly comprises a single chip Microcomputer (MCU) and peripheral related circuits thereof. The system adopts a 32-bit singlechip system of ST at present, and mainly comprises analysis and conversion of an upper computer signal instruction, calculation and control of a sensor chip power supply to be programmed and realization of communication between the sensor chip. The calculation of the related parameters of the chip and the processing of the data are also completed by the singlechip.
The sensor communication unit mainly comprises digital I/O ports corresponding to each communication module of the MCU and a controllable level conversion circuit. The communication protocol mode can be controlled by the upper computer to select the communication protocol matched with the chip to be programmed. The communication protocol between the chip to be programmed comprises, but is not limited to, IIC/SPI/OWI/CAN/SENT and the like, and CAN be changed and expanded by software at a later stage. The level conversion circuit mainly realizes level adaptation of I/O interfaces of two communication parties, and can realize communication and programming with a chip working under any voltage by matching with the DAC control power supply. The circuit can be built by the MOS tube and the resistor under the simplest condition, but the circuit has the determination of slow communication rate and weaker driving current, and meanwhile, the condition that the power supply of the pull-up resistor at the drain electrode of the MOS device cannot be always smaller than the power supply of the pull-up resistors at the gate electrode and the source electrode end is ensured, otherwise, the system communication is unstable is caused. The design is updated on the basis, referring to fig. 2, the stability of the circuit and the compatibility of the right circuit voltage signal are improved by matching the multi-stage MOS tube and the amplifier circuit, so that the design is better matched with the original purpose of the system design.
The electromagnetic isolation module mainly ensures the stability of the system in the normal use process and avoids communication interference errors caused by external voltage fluctuation. The module ensures the reliability of data transmission of the USB line in physical contact with the outside in the form of isolating the chip and hollowing out the PCB layout. And meanwhile, independent ground wires are arranged around the PCB and a metal shell is used for isolating electromagnetic radiation interference in the space.
The upper computer communication module can establish communication connection between the programming system and the PC, control the programming system by operating a man-machine interaction interface on the PC, configure a communication protocol of a chip to be programmed and a power supply voltage of the chip, send parameters of required programming configuration to the upper computer, establish communication with the chip to be programmed after being analyzed and processed by the MCU, and return data acquired after the communication to the upper computer for printing and displaying.
The magnetic sensor chip, i.e. the target chip to be programmed, is placed in a chip slot (socket) of a programming system, and the MCU can control the power-on and power-off operation of the magnetic sensor chip and establish related communication connection with the MCU to acquire or modify the chip parameters.
Fig. 3 is a schematic diagram showing the overall system hardware layout. The layout of the system hardware PCB board can be controlled within 50 mm. The volume design of the whole hardware system can be controlled within 50mm and 15mm, and the whole programming work can be performed by externally connecting a USB data line; the magnetic sensor chip is very convenient to carry when going out, and the convenience of the on-site application engineer for debugging the magnetic sensor chip when going out is greatly improved.
The programming operation flow is simpler; fig. 4 is a flow chart of the overall operation. The overall operation flow of the magnetic sensor communication system of the utility model is as follows:
S1, after the programming system is connected to the PC through a USB line, a power switch can be started to electrify the whole system, and meanwhile, communication connection is established with an upper computer at the PC end.
S2, opening upper computer software, switching to a communication protocol interface to be used, and inputting a power supply voltage value required by a chip to be programmed.
S3, taking a chip to be programmed and putting the chip into a system SOCKET.
S4, clicking a power button of the upper computer interface to control the power module of the system to power on and off the chip to be programmed.
S5, configuring a specific register address and a specific register value which need to be communicated with the chip, establishing communication between the clicking communication button control system and the chip to be programmed, and returning the acquired chip data to the upper computer for printing and displaying.
S6, in the running process of the system, a communication protocol between the programming system and the chip to be programmed can be changed at any time through a configuration instruction issued by the upper computer, and a power supply voltage value of the chip to be programmed is supplied to the system power supply module.
And S7, after programming is finished, closing a system main power switch, and disconnecting the USB connecting wire with the PC to finish all programming work.
And S8, after all the tests are completed, turning off a system main power switch, and ending all the test works.
And (3) repeating the steps S3-S6 to program a single chip or program different chip parameters in a communication way.
The system upper computer software is simple to operate, and the corresponding communication protocol and the normal working voltage of the chip can be switched by only one instruction when different chips are replaced. The instruction is integrated into the upper computer software, and the actual operation is only required to click the corresponding button once. The system now supports the most commonly used two-way communication protocols IIC, SPI, CAN, OWI in the market, and also includes information analysis of digital signals of unidirectional sensors such as SENT, PWM, etc. More communication protocols and information analysis of digital signals can be added later as required.
In summary, the magnetic sensor communication system provided by the utility model can improve the compatibility and convenience of connection communication with the chip, meet the communication programming requirement of users on the chip anytime and anywhere, reduce the cost and improve the working efficiency of the users.
In a use scene of the utility model, the utility model greatly reduces the volume, increases the convenience and portability and greatly reduces the cost of the system by multiplexing the power supply and the communication mode of the USB interface. The utility model uses the circuit of DAC and amplifier combination, can simplify the power supply scheme of the chip through MCU cooperation, cooperate with the high-speed signal conversion chip of the wide power, has expanded the compatibility to the magnetic sensor chip, meet users ' communication programming demand to the chip at any time and any place greatly, in order to make users obtain the chip parameter more conveniently, revise the chip parameter in order to better accord with users ' use requirement, promote users ' work efficiency.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The description and applications of the present utility model herein are illustrative and are not intended to limit the scope of the utility model to the embodiments described above. Effects or advantages referred to in the embodiments may not be embodied in the embodiments due to interference of various factors, and description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternatives and equivalents of the various components of the embodiments are known to those of ordinary skill in the art. It will be clear to those skilled in the art that the present utility model may be embodied in other forms, structures, arrangements, proportions, and with other assemblies, materials, and components, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the utility model.
Claims (9)
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| CN120084262A (en) * | 2025-05-06 | 2025-06-03 | 浙江可得电子科技有限公司 | Vehicle height sensor detection device and detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120084262A (en) * | 2025-05-06 | 2025-06-03 | 浙江可得电子科技有限公司 | Vehicle height sensor detection device and detection method |
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