IO port data acquisition circuit of industrial control equipment

Abstract

The utility model relates to an industrial control equipment IO port data acquisition circuit, which comprises an external input module, a WIFI control module, an Ethernet control module and an RJ45 transmission module, and is characterized in that the external input module comprises a plurality of photoelectric switch management units, the photoelectric switch management units are used for converting acquisition signals into standard electric signals, and the standard electric signals are transmitted to the Ethernet control module through the RJ45 transmission module; the signal output end of the photoelectric switch management unit transmits the signal to the WIFI control module, the data communication end of the WIFI control module is connected with the first data communication end of the Ethernet control module, and the second data communication end of the Ethernet control module is connected with the data communication end of the RJ45 transmission module. According to the utility model, the functions of IO point acquisition, signal conversion, wireless communication and wired communication are integrated into the same main control chip and hardware equipment, so that the defect of equipment separation in a traditional IO acquisition scheme is overcome, the dependence on a plurality of hardware devices is reduced, and the compatibility problem caused by interface separation in the traditional scheme is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of data acquisition circuit, especially a kind of IO port data acquisition circuit of industrial computer equipment. BACKGROUND

[0002] Current IO acquisition scheme is usually divided into two independent parts: one part is the hardware dedicated to the acquisition of IO point, and the data points collected are transmitted through 485 serial port and the like;The other part is to forward these data to the server through a separate wireless transmission device (such as a wireless network card). This separated design has certain limitations, not only the number of hardware devices is large, the installation and deployment process is relatively complex, and interface compatibility problems or unstable communication may occur during data transmission. In addition, the compatibility between different devices is insufficient, which also brings additional burden on adaptation and development for users.

[0003] In the prior art, IO acquisition and wireless communication module are usually designed independently, and multiple hardware devices are needed to complete the logical functions of data acquisition and transmission, increasing hardware cost and deployment difficulty. At the same time, the design of traditional IO interface lacks pertinence, and the adaptability to various models and complex scenes is poor, which cannot well meet the diversified needs of users. SUMMARY

[0004] In order to solve the problems of complex installation, poor interface compatibility and insufficient adaptability caused by device separation in the existing IO acquisition scheme, the utility model provides an IO port data acquisition circuit of industrial computer equipment.

[0005] An IO port data acquisition circuit of industrial computer equipment, the IO port data acquisition circuit of industrial computer equipment includes external input module, WIFI control module, Ethernet control module and RJ45 transmission module, the external input module includes a plurality of parallelly arranged photoelectric switch management units, the signal input end of the photoelectric switch management unit is used to collect the collection signal of the corresponding external sensor, the signal output end of the photoelectric switch management unit is connected with the signal input end of the WIFI control module, the photoelectric switch management unit is used to convert the collection signal into standard electrical signal, and the signal output end of the photoelectric switch management unit is transmitted to the WIFI control module based on the photoelectric switch management unit, to realize the data transmission operation of WIFI communication mode, the data communication end of the WIFI control module is connected with the first data communication end of the Ethernet control module, the second data communication end of the Ethernet control module is connected with the data communication end of the RJ45 transmission module, to send standard network data to the RJ45 transmission module, and the RJ45 transmission module is used to transmit the standard network data to external network equipment through the corresponding RJ45 interface, to realize the data transmission operation of Ethernet communication mode.

[0006] By adopting the technical scheme, the IO port data acquisition circuit of the industrial control equipment integrates the IO point acquisition, signal conversion, wireless communication and wired communication, i.e. the WIFI control module and the Ethernet control module, into the same main control chip and hardware device through highly integrated design, thereby breaking the disadvantages of device separation in the traditional IO acquisition scheme. The existing IO acquisition scheme is usually divided into two parts: one part acquires data points through a 485 serial port or a similar hardware interface, and the other part relies on an independent wireless transmission device, such as an external network card, to transmit the acquired data to a server. This separated design not only increases the number of hardware devices and the installation complexity, but also easily leads to interface compatibility problems and reduces the adaptability of the system to different devices. The IO acquisition module directly acquires the signals of external sensors through multiple optoelectronic switch management units and transmits the signals to the WIFI control module after being converted into standard electrical signals, thereby realizing wireless data transmission. For scenarios requiring wired communication, the data is transmitted to external network devices through the RJ45 interface after being communicated with the Ethernet control module through the WIFI module. Through this design, the dependence on multiple hardware devices is reduced, and the compatibility problems caused by interface separation in the traditional scheme are avoided.

[0007] Preferably, the optoelectronic switch management unit comprises at least one two-way optoelectronic switch, the two-way optoelectronic switch is provided with two parallel signal input channels and a photosensitive triode, each of the signal input channels is provided with a light-emitting diode, the conduction directions of the light-emitting diodes in the two signal input channels are different, the first conduction end of the photosensitive triode is connected with a power supply, a common node between the first conduction end of the photosensitive triode and the power supply is connected with a signal input end of the WIFI control module, the second conduction end of the photosensitive triode is grounded, and the controlled end of the photosensitive triode is used for receiving the light signal emitted by the light-emitting diode in one of the signal input channels.

[0008] By adopting the technical scheme, the independent input of different signals can be realized through the two signal input channels, and the signal conversion into standard electrical signals can be realized through the photosensitive triode. In addition, since the conduction directions of the light-emitting diodes in the two signal input channels are different, the short circuit or interference problem caused by different signal directions can be effectively avoided, thereby improving the accuracy of signal transmission and the reliability of the system.

[0009] Preferably, every four optoelectronic switch management units are packaged into an optoelectronic switch input sub-module, the optoelectronic switch input sub-module is connected with a signal stabilizing resistor sub-module, the signal stabilizing resistor sub-module comprises a plurality of parallel pull-up resistors, the first end of the pull-up resistor is connected with a power supply, and the second end of the pull-up resistor is connected with the first conduction end of the photosensitive triode.

[0010] By adopting the technical scheme, the plurality of optoelectrical switch management units can be modularly managed through the packaging design of the optoelectrical switch input sub-module, and the output signal can be stably processed through the pull-up resistance design of the signal stabilizing resistance sub-module, so that the data acquisition circuit is enhanced in the adaptation capability to the sensor signals in a plurality of complex scenes, and the stability and transmission quality of the acquired signals are further improved.

[0011] Preferably, the IO port data acquisition circuit of the industrial control device further comprises a clock module, the clock module comprises a battery interface J1, a clock chip U6 and a crystal oscillator assembly Y1, the battery interface J1 is used to connect an external battery to provide continuous power supply for the real-time clock chip U6 to realize clock keeping in a power-off state, an oscillator input end of the real-time clock chip U6 is connected with a first end of the crystal oscillator assembly Y1, a second end of the crystal oscillator assembly Y1 is connected with an oscillator output end of the real-time clock chip U6, an I2C communication interface is arranged on the real-time clock chip U6, and the I2C communication interface is used to realize clock configuration and read-write interaction of time data between the WIFI control module and the real-time clock chip U6.

[0012] By adopting the technical scheme, the clock chip can be provided with continuous power supply through the battery interface in a power-off state, so that the real-time clock chip can accurately keep time, and a high-precision reference clock signal is provided through the crystal oscillator assembly to realize stable output of the clock, thereby ensuring the time synchronization and accuracy of the system under different working conditions.

[0013] Preferably, a capacitor C19 is connected between the second end of the crystal oscillator assembly Y1 and the ground, and a capacitor C18 is connected between the oscillator input end of the real-time clock chip U6 and the ground.

[0014] By adopting the technical scheme, the circuit can be filtered and voltage-stabilized through the capacitors arranged between the key nodes of the crystal oscillator assembly and the real-time clock chip, so that the clock signal is prevented from being disturbed by high-frequency signals, thereby improving the stability of the clock signal and the reliability of the circuit operation.

[0015] Preferably, the WIFI control module comprises a WIFI control chip U4, the Ethernet control module comprises an Ethernet control chip U5, a clock synchronization end of the Ethernet control chip U5 is connected with a clock synchronization end of the WIFI control chip U4, so that the Ethernet control chip U5 shares a clock signal with the WIFI control chip U4, a reset end of the Ethernet control chip U5 is connected with a reset end of the WIFI control chip U4, so that the Ethernet control chip U5 and the WIFI control chip U4 realize unified reset management, and a transmission enable communication end of the Ethernet control chip U5 is connected with a transmission enable communication end of the WIFI control chip U4, so as to determine whether to perform data transmission operation with an external network device through the WIFI control chip U4 or through the Ethernet control chip U5.

[0016] By adopting the technical scheme, unified management of the clock signal can be realized through clock synchronization between the WIFI control chip and the Ethernet control chip, unified reset control between the chips can be realized through connection of the reset ends, and automatic selection of the data transmission path can be realized through connection of the transmission enable communication ends, so that flexibility of data transmission and integration of the device are improved.

[0017] Preferably, the RJ45 transmission module comprises an interface RJ1, the interface RJ1 is provided with a transmission differential signal winding and a reception differential signal winding, a first end of a primary winding in the transmission differential signal winding is connected with a first data transmission differential signal end of the Ethernet control chip U5, a second end of the primary winding in the transmission differential signal winding is connected with a second data transmission differential signal end of the Ethernet control chip U5, first and second ends of a secondary winding in the transmission differential signal winding are connected with an external network device, a first end of a primary winding in the reception differential signal winding is connected with a first data reception differential signal end of the Ethernet control chip U5, a second end of the primary winding in the reception differential signal winding is connected with a second data reception differential signal end of the Ethernet control chip U5, and first and second ends of a secondary winding in the reception differential signal winding are connected with the external network device.

[0018] By adopting the technical scheme, transmission and reception of the Ethernet signal can be realized through the transmission differential signal winding and the reception differential signal winding of the RJ45 transmission module, electromagnetic isolation protection and stable Ethernet communication can be realized through connection of the differential signal ends of the primary winding and the Ethernet control chip and connection of the secondary winding and the external network device, and therefore anti-interference capability and reliability of data transmission are improved.

[0019] Preferably, the IO port data acquisition circuit of the industrial control device further comprises a power supply module, the power supply module comprises an input protection unit, a step-down conversion unit, an output filter unit and a feedback adjustment unit, the power input end of the input protection unit is connected with a power supply, the power output end of the input protection unit is connected with the power input end of the step-down conversion unit, the power output end of the step-down conversion unit is connected with the power input end of the output filter unit, the common node between the power output end of the step-down conversion unit and the power input end of the output filter unit is connected with the power signal input end of the feedback adjustment unit, and the feedback signal output end of the feedback adjustment unit is connected with the feedback signal input end of the step-down conversion unit.

[0020] By adopting the above technical solution, the overcurrent, reverse voltage and voltage fluctuation of the power input end can be effectively protected by the input protection unit of the power supply module, the input voltage is converted into stable output voltage by the step-down conversion unit, the voltage is smoothed by the output filter unit, and finally the stability and accuracy of the output voltage are ensured by the feedback adjustment unit, thereby improving the reliability and adaptability of the power supply system.

[0021] Preferably, the input protection unit comprises a fuse F1, a diode D1, a diode D2, a capacitor C2, a capacitor C3, a resistor R4 and a resistor R8, the first end of the fuse F1 is connected with a power supply, the second end of the fuse is connected with the positive electrode end of the diode D1, the negative electrode end of the diode D1 is connected with the negative electrode end of the diode D2, the positive electrode end of the diode D2 is grounded, the negative electrode end of the diode D1 is connected with the ground respectively through the capacitor C2 and the capacitor C3, and the resistor R4 and the resistor R8 constitute a voltage division acquisition network, and the signal output end of the voltage division acquisition network is connected with the start-stop enable signal input end of the step-down conversion unit.

[0022] By adopting the above technical solution, the input power can be protected by the fuse, diode and voltage division network in the input protection unit, the power supply circuit is protected by the fuse when the power supply is overloaded, the diode protection circuit is used when the voltage is reversed, and the voltage acquisition and start-stop control signal generation are realized by the voltage division network, thereby effectively improving the safety and intelligent level of the power supply module.

[0023] Preferably, the voltage reduction conversion unit at least comprises a voltage reduction conversion chip U2, the feedback adjustment unit comprises a resistor R6 and a resistor R7, a common node between a power supply output end of the voltage reduction conversion chip U2 and a power supply input end of the output filter unit is connected with a first end of the resistor R6, a second end of the resistor R6 is connected with a first end of the resistor R7, a second end of the resistor R7 is grounded, and a common node between the second end of the resistor R6 and the first end of the resistor R7 is connected with a feedback signal input end of the voltage reduction conversion chip U2.

[0024] By adopting the technical scheme, the feedback resistor network in the voltage reduction conversion unit can realize accurate adjustment of the output voltage, the voltage reduction conversion chip can convert and stably output the input voltage, and the feedback adjustment unit can perform closed-loop control on the voltage, so that the accuracy and reliability of the voltage output are ensured, and the power supply requirement of the industrial control equipment is met.

[0025] In summary, the utility model has at least one of the following beneficial technical effects:

[0026] 1、The industrial control equipment IO port data acquisition circuit breaks through the disadvantages of device separation in the traditional IO acquisition scheme by highly integrated design, integrating the IO point acquisition, signal conversion, wireless communication and wired communication, i.e., the WIFI control module and the Ethernet control module, into the same main control chip and hardware device.

[0027] 2、The technical scheme of the utility model integrates the IO acquisition module, the WIFI communication module and the Ethernet communication module in a single hardware device, optimizing the whole-process logic of data acquisition and transmission.

[0028] 3、The height integration design of the utility model significantly simplifies the hardware deployment process, and the user can complete data acquisition and transmission function only by installing a hardware device, reduces wiring and debugging workload. Meanwhile, the utility model carries out customization development aiming at user pain point on IO interface design, makes it adapt to more industrial scenes and equipment types, improves the universality and reliability of the system. Overall, the utility model solves the problems of installation complexity, poor interface compatibility and insufficient adaptability caused by device separation in traditional IO acquisition scheme through integrated design and function optimization, provides more efficient and flexible solution for the user. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a flow chart of an industrial control equipment IO port data acquisition circuit in an embodiment of the utility model.

[0030] Figure 2 is a partial circuit schematic diagram of an external input module in an industrial control equipment IO port data acquisition circuit in an embodiment of the utility model.

[0031] Figure 3 is a partial circuit schematic diagram of a clock module in an industrial control equipment IO port data acquisition circuit in an embodiment of the utility model.

[0032] Figure 4 is a partial circuit schematic diagram of a WIFI control module in an industrial control equipment IO port data acquisition circuit in an embodiment of the utility model.

[0033] Figure 5 is a partial circuit schematic diagram of an RJ45 transmission module in an industrial control equipment IO port data acquisition circuit in an embodiment of the utility model.

[0034] Figure 6 is a partial circuit schematic diagram of an Ethernet control module in an industrial control equipment IO port data acquisition circuit in an embodiment of the utility model.

[0035] Figure 7 is a partial circuit schematic diagram of a power supply module in an industrial control equipment IO port data acquisition circuit in an embodiment of the utility model. DETAILED DESCRIPTION

[0036] The utility model will be further explained in detail in combination with the drawings.

[0037] In an embodiment, as Figure 1The utility model discloses an industrial control equipment IO mouth data acquisition circuit, an industrial control equipment IO mouth data acquisition circuit includes external input module, WIFI control module, ethernet control module and RJ45 transmission module, and external input module includes a plurality of photoelectric switch management units of parallelly arranged, and the signal input end of photoelectric switch management unit is used to gather the collection signal of corresponding external sensor, and the signal output end of photoelectric switch management unit is connected with the signal input end of WIFI control module, and photoelectric switch management unit is used to convert collection signal into standard electric signal, and is based on the signal output end of photoelectric switch management unit transmission to WIFI control module to realize the data transmission operation of WIFI communication mode, and the data communication end of WIFI control module is connected with the first data communication end of ethernet control module, and the second data communication end of ethernet control module is connected with the data communication end of RJ45 transmission module to send standard network data to RJ45 transmission module, and RJ45 transmission module is used to through corresponding RJ45 interface with standard network data transmission to external network equipment to realize the data transmission operation of ethernet communication mode.

[0038] In the embodiment, the industrial control device IO port data acquisition circuit realizes the complete functional link of data acquisition, signal processing, wireless transmission and wired transmission through the close connection between the modules. The signal input end of the photoelectric switch management unit in the external input module is directly connected with the external sensor, which is used to collect the original signal output by the sensor; the collected signal is converted into a standard electrical signal by the internal circuit of the photoelectric switch management unit, and then transmitted from the signal output end to the signal input end of the WIFI control module, completing the preliminary processing and transmission of the collected signal. The core of the WIFI control module is to package and transmit the received standard electrical signal through the built-in wireless communication function. At the same time, the module also undertakes the function of data interaction with the Ethernet control module, and its data communication end is connected with the first data communication end of the Ethernet control module, thereby establishing the data switching path between wireless communication and wired communication. When data needs to be transmitted through wired mode, the WIFI control module transmits the processed data to the Ethernet control module, and through the protocol analysis function of the module, the data format conforming to the Ethernet communication standard is generated; then, through the second data communication end of the Ethernet control module, the standardized network data is transmitted to the data communication end of the RJ45 transmission module. The RJ45 transmission module is the physical interface of the entire system to connect the external network, and its internal contains the differential signal winding for sending and receiving, which is used to process the data sending signal from the Ethernet control module and the receiving signal returned from the external network, thereby realizing the bidirectional transmission of data. This design realizes the seamless connection of data flow between modules, and through strict interface and protocol standards, it guarantees the stability of the signal and the efficiency of the transmission. At the same time, through the close cooperation between the modules in logic, it ensures that the system has flexible communication switching capability and wide device adaptability.

[0039] In summary, the IO port data acquisition circuit of the industrial control equipment integrates the collection of IO points, signal conversion, wireless communication and wired communication, i.e. WIFI control module and Ethernet control module, into the same master control chip and hardware device through highly integrated design, breaking through the disadvantages of device separation in traditional IO acquisition schemes. Existing IO acquisition schemes are usually divided into two parts: one part collects data points through 485 serial port or similar hardware interface, and the other part relies on independent wireless transmission equipment, such as external network card, to transmit the collected data to the server. This separated design not only increases the number of hardware devices and installation complexity, but also easily leads to interface compatibility problems and reduces the adaptability of the system to different devices. The IO acquisition module directly collects the signals of external sensors through multiple optoelectronic switch management units and transmits them to the WIFI control module after conversion into standard electrical signals, realizing wireless data transmission. For scenarios requiring wired communication, data is transmitted to external network equipment through the RJ45 interface after communication with the Ethernet control module through the WIFI module. Through this design, the dependence on multiple hardware devices is reduced, and the compatibility problems caused by interface separation in traditional schemes are avoided.

[0040] Further, as shown in Figure 2 The optoelectronic switch management unit at least includes one two-way optoelectronic switch, two signal input channels and a photosensitive triode are arranged on the two-way optoelectronic switch, wherein a light-emitting diode is arranged in each signal input channel, the conduction directions of the light-emitting diodes in the two signal input channels are inconsistent, the first conduction end of the photosensitive triode is connected with the power supply, the common node between the first conduction end of the photosensitive triode and the power supply is connected with the signal input end of the WIFI control module, the second conduction end of the photosensitive triode is grounded, and the controlled end of the photosensitive triode is used for receiving the light signal emitted by the light-emitting diode in one of the signal input channels.

[0041] In the present embodiment, in the photoelectric switch management unit, each two-way photoelectric switch realizes independent acquisition and transmission of signals through two parallel signal input channels. The two signal input channels are connected to an external signal source through respective light-emitting diodes. Each signal input channel light-emitting diode is responsible for converting external electrical signals into optical signals, and the two light-emitting diodes have opposite conduction directions to ensure that no matter how the polarity of the input signal changes, one channel will always be correctly turned on, thereby ensuring the accuracy of the optical signal. After the light-emitting diode emits the optical signal, it is transmitted to the controlled end of the same photosensitive triode. The photosensitive triode responds to the input optical signal through the photoelectric effect and completes the conversion from the optical signal to the electrical signal. The first conduction end of the photosensitive triode is connected to the power supply to provide working voltage, and the common node between the first conduction end and the power supply is connected to the signal input end of the WIFI control module, ensuring that the converted standard electrical signal can be transmitted to the WIFI control module for further processing. The second conduction end of the photosensitive triode is directly grounded to form a current loop and ensure stable operation of the photosensitive triode. Through this connection relationship and control logic design, the compatibility of input signals of different polarities, the bidirectional conversion of optical signals and electrical signals, and the data transmission with the WIFI control module are realized, effectively improving the accuracy and stability of signal acquisition, and optimizing the subsequent data transmission process.

[0042] In summary, independent input of different signals can be realized through two signal input channels, and the signal can be converted to a standard electrical signal through a photosensitive triode. Due to the inconsistent conduction direction of the light-emitting diodes in the two signal input channels, short circuit or interference problems caused by different signal directions can be effectively avoided, thereby improving the accuracy of signal transmission and the reliability of the system.

[0043] Further, the design of the external input module is around the diversified needs of industrial control equipment, providing multiple types of signal input interfaces to achieve wide compatibility and adaptability in multiple scenarios. The specific port functions and logic are as follows: power input interface, the module supports wide voltage range power input design, which can compatible with common power supply voltage specifications on the market, providing stable power support for data acquisition module. The wide voltage input design enables it to adapt to the power supply conditions in different equipment environments, ensuring the reliability and stability of the module in complex industrial scenarios; external sensor signal input interface, the external input module provides dedicated signal access ports for connecting external sensors. These port designs are aimed at special signals that customers cannot collect through existing PLC controllers or boards, enabling efficient capture of external sensor signals and converting them into standard electrical signals. The converted electrical signals are processed by the internal processing program and uploaded to the server, completing the data acquisition task. To adapt to the diverse sensor needs, the module integrates two high-response photoelectric switches that support accurate capture of fast signals. The design of the photoelectric switch optimizes the real-time performance of signal acquisition, meeting the requirements of efficient data acquisition in industrial environments; state signal acquisition interface, the module has a special port for collecting device status signals, which is designed to connect the three-color signal lights (green, yellow, and red) of the device. These interfaces can collect the current working status of the device in real time, ensuring that the status changes are synchronized with the server. For example, when the green light of the device is on, the acquisition module pushes the production status to the server; when the yellow light is on, it pushes the standby status; when the red light is on, it pushes the alarm status. Through this design, customers can easily achieve device status monitoring without additional development of complex interfaces, greatly improving the flexibility and ease of use of signal acquisition; process signal acquisition interface, the module has three process signal input interfaces designed specifically for the data acquisition needs of periodic production equipment. For example, for devices such as injection molding machines, the module can accurately collect production cycle information by connecting to the mold opening end signal point. Since the mold opening end signal has a unique high-low level trigger characteristic during the production cycle, the module can ensure the accuracy and integrity of the data. Customers can use this collected data for production rhythm analysis, efficiency optimization, and process improvement.

[0044] Further, as shown in Figure 2 each four photoelectric switch management units arranged in parallel are packaged into a photoelectric switch input sub-module, and each photoelectric switch input sub-module is connected with a signal stabilizing resistor sub-module, and the signal stabilizing resistor sub-module includes a plurality of pull-up resistors arranged in parallel, a first end of the pull-up resistor is connected with the power supply, and a second end of the pull-up resistor is connected with the first conduction end of the photoelectric triode.

[0045] In the embodiment, every four photoelectric switch management units arranged in parallel are packaged as a photoelectric switch input sub-module, centralized collection and processing of multiple signals are realized through the modular design, the independent connection logic between the signal input channel, the light emitting diode and the photoelectric triode in each photoelectric switch management unit of the photoelectric switch input sub-module is still maintained, and interference of the signals is ensured. The signal output end of the photoelectric switch input sub-module is connected with the power supply and the photoelectric triode through a signal stabilizing resistor sub-module, the signal stabilizing resistor sub-module is composed of a plurality of pull-up resistors arranged in parallel, the first end of each pull-up resistor is directly connected with the power supply, and is used for providing a stable working voltage for the photoelectric switch input sub-module, and the second end of each pull-up resistor is connected to the first conduction end of the photoelectric triode, the stability of the signal output level is improved through the pull-up effect of the resistor, and the mis-triggering or signal loss caused by insufficient input current or signal jitter is prevented. The first conduction end of the photoelectric triode is connected to the signal stabilizing resistor sub-module and the signal output end of the photoelectric switch management unit at the same time, so as to uniformly receive signals from a plurality of parallel photoelectric switch management units, and transmit the standard electrical signals after stable processing to subsequent modules. The connection relationship ensures the reliability of signal collection and transmission, and further enhances the anti-interference ability of the entire signal link on the basis of the modular design, and improves the adaptability and accuracy of the system in a complex environment.

[0046] Furthermore, the utility model discloses a two-way optical coupling design, solves signal trigger compatibility and high voltage range signal reliable triggering problem. Two-way optical coupling can support two modes simultaneously, realize the compatibility of different trigger mechanism, ensure that no matter how the trigger logic of signal voltage changes, stable signal response can be realized. In addition, the two-way optical coupling design provides a solution to the old model signal voltage jitter problem. When the signal voltage of the old model is not standard due to equipment aging or unstable circuit, one-way optical coupling can not trigger accurately, and two-way optical coupling can effectively deal with the instability caused by voltage jitter through its two-way conduction ability, and ensure the accuracy and consistency of triggering.

[0047] On the other hand, in order to solve the problem that the device voltage exceeds the normal optical coupling design range, the bidirectional optical coupling supports a wide voltage trigger range of 5V-80V. The traditional optical coupling usually supports a voltage range of 5V-24V, but in industrial equipment, the voltage can be as high as 28V or even higher due to signal peaks or machine characteristics. The ordinary optical coupling is easy to be damaged in this case, while the bidirectional optical coupling of the utility model widens the voltage support range and can work normally between 5V-80V, avoiding optical coupling damage or trigger failure caused by voltage exceeding the range. This design improves the adaptability and durability of the signal interface, can meet the high and low level trigger requirements in various industrial scenes, and provides protection for the long-term stable operation of the equipment.

[0048] In summary, the packaging design of the photoelectric switch input sub-module can modularly manage multiple photoelectric switch management units, and the pull-up resistor design of the signal stabilizing resistor sub-module can stabilize the output signal, thereby enhancing the adaptive ability of the data acquisition circuit to sensor signals in various complex scenes and further improving the stability and transmission quality of the acquired signals.

[0049] Further, as shown in Figure 3 The IO port data acquisition circuit of the industrial control equipment further includes a clock module, the clock module includes a battery interface J1, a clock chip U6 and a crystal oscillator assembly Y1, the battery interface J1 is used for connecting an external battery, and provides continuous power supply for the real-time clock chip U6 to realize clock keeping in the case of power failure, the oscillator input end of the real-time clock chip U6 is connected with the first end of the crystal oscillator assembly Y1, the second end of the crystal oscillator assembly Y1 is connected with the oscillator output end of the real-time clock chip U6, and the real-time clock chip U6 is provided with an I2C communication interface, the I2C communication interface is used for realizing the read-write interaction of clock configuration and time data between the WIFI control module and the real-time clock chip U6.

[0050] In the embodiment, the clock module in the IO port data acquisition circuit of the industrial control device realizes clock keeping in the power-off state and accurate time reference providing through the cooperation of the battery interface J1, the clock chip U6 and the crystal oscillator assembly Y1. The battery interface J1 is connected with an external battery to provide continuous power input for the clock chip U6, thereby ensuring that the clock function can still run when the main power is disconnected. The oscillator input end of the clock chip U6 is connected with the first end of the crystal oscillator assembly Y1, the second end of the crystal oscillator assembly Y1 is connected with the oscillator output end of the clock chip U6, the crystal oscillator assembly Y1 provides a high-precision oscillation signal to ensure the time measurement and synchronization accuracy of the clock chip U6, and the closed loop design of the oscillator input end and the output end supports the stable generation of the clock signal. The clock chip U6 is provided with an I2C communication interface, through which the signal connection with the WIFI control module is realized. The WIFI control module performs data interaction with the clock chip U6 through the I2C bus, including read-write operation on clock configuration and real-time acquisition of time data, thereby ensuring the time synchronization of the entire data acquisition system and the accuracy of data recording. Through such a structural design, the time keeping of the clock module in the power-off state and the time synchronization function in the normal working state of the circuit are organically combined, and the interaction with the WIFI control module improves the overall coordination and operation efficiency of the system.

[0051] In summary, the clock chip can be continuously powered through the battery interface in the power-off state, ensuring that the real-time clock chip can accurately keep time, and a high-precision reference clock signal is provided through the crystal oscillator assembly to realize stable output of the clock, thereby ensuring the time synchronization and accuracy of the system under different working conditions.

[0052] Further, as shown in Figure 3 The second end of the crystal oscillator assembly Y1 is connected with the capacitor C19, and the oscillator input end of the real-time clock chip U6 is connected with the capacitor C18.

[0053] In this embodiment, the second end of the crystal oscillator assembly Y1 is connected to the ground through the capacitor C19 for providing stable filtering of high-frequency signals for the crystal oscillator circuit, while suppressing fluctuations in high-frequency signals caused by external interference, ensuring the purity and stability of the oscillation signal; while the oscillator input end of the real-time clock chip U6 is connected to the ground through the capacitor C18 for further filtering and decoupling of the input signal, reducing high-frequency interference at the input end caused by power supply noise or other external factors, and improving the working stability of the internal oscillator of the chip. This capacitor configuration introduces filtering capacitors at key oscillation nodes, forming a stable circuit path between the crystal oscillator assembly Y1, the real-time clock chip U6 and the ground, so that the oscillation signal can maintain high precision and low noise characteristics during generation and input stages, thereby providing a reliable reference clock signal for time synchronization and data transmission of the entire clock module. The introduction of capacitors C19 and C18 further enhances the resistance of the circuit to external environmental interference, so that the clock module can still ensure normal operation in a complex electromagnetic environment, and provides a precise time reference for the downstream WIFI control module and data acquisition logic.

[0054] In summary, the capacitor can be set between the key nodes of the crystal oscillator assembly and the real-time clock chip to filter and stabilize the voltage of the circuit, avoiding interference of high-frequency signals on the clock signal, thereby improving the stability of the clock signal and the reliability of the circuit operation.

[0055] Further, as shown in Figure 4 and Figure 6 , the WIFI control module includes a WIFI control chip U4, and the Ethernet control module includes an Ethernet control chip U5. The clock synchronization end of the Ethernet control chip U5 is connected to the clock synchronization end of the WIFI control chip U4, so that the Ethernet control chip U5 and the WIFI control chip U4 share the clock signal. The reset end of the Ethernet control chip U5 is connected to the reset end of the WIFI control chip U4, so that the Ethernet control chip U5 and the WIFI control chip U4 realize unified reset management. The transmission enable communication end of the Ethernet control chip U5 is connected to the transmission enable communication end of the WIFI control chip U4, for determining whether to perform data transmission operation with external network equipment through the WIFI control chip U4 or through the Ethernet control chip U5.

[0056] In the embodiment, the WIFI control chip U4 in the WIFI control module and the Ethernet control chip U5 in the Ethernet control module share the clock signal through the clock synchronization end, specifically, the clock synchronization end of the WIFI control chip U4 is directly connected with the clock synchronization end of the Ethernet control chip U5, so that the two can perform data processing and communication operation based on the same reference clock signal, thereby ensuring the time synchronization of wireless communication and wired communication and improving the overall coordination efficiency of the system. Meanwhile, the reset end of the Ethernet control chip U5 is connected with the reset end of the WIFI control chip U4, and the synchronous reset of the two chips when the system starts or abnormally recovers is realized through unified reset management, so as to ensure that the two modules can work cooperatively in the same state and avoid the timing mismatch problem caused by independent reset. In addition, the transmission enable communication end of the Ethernet control chip U5 is connected with the transmission enable communication end of the WIFI control chip U4, which is used to realize the dynamic selection logic of the data transmission path. When data needs to be transmitted through wireless mode, the transmission enable signal of the WIFI control chip U4 is activated, and the transmission function of the Ethernet control chip U5 is disabled; conversely, when data needs to be transmitted through wired mode, the transmission enable signal of the Ethernet control chip U5 is activated, and the transmission function of the WIFI control chip U4 is disabled, thereby ensuring the exclusivity of wireless communication and wired communication when the functions are switched, and avoiding the data conflict caused by simultaneous activation. The overall connection relationship ensures the efficient cooperation of the two communication modes, so that the data acquisition circuit can flexibly select the data transmission path according to the actual demand, while maintaining the time synchronization and operation consistency of the system.

[0057] In summary, the unified management of the clock signal can be realized through the clock synchronization between the WIFI control chip and the Ethernet control chip, the unified reset control between the chips is realized through the connection of the reset end, and the automatic selection of the data transmission path is realized through the connection of the transmission enable communication end, thereby improving the flexibility of data transmission and the integration of the device.

[0058] Further, as Figure 5As shown, the RJ45 transmission module includes an interface RJ1, which is provided with a transmitting differential signal winding and a receiving differential signal winding. The first end of the primary winding in the transmitting differential signal winding is connected to the first data transmitting differential signal end of the Ethernet control chip U5, the second end of the primary winding in the transmitting differential signal winding is connected to the second data transmitting differential signal end of the Ethernet control chip U5, the first and second ends of the secondary winding in the transmitting differential signal winding are connected to external network equipment, the first end of the primary winding in the receiving differential signal winding is connected to the first data receiving differential signal end of the Ethernet control chip U5, the second end of the primary winding in the receiving differential signal winding is connected to the second data receiving differential signal end of the Ethernet control chip U5, and the first and second ends of the secondary winding in the receiving differential signal winding are connected to external network equipment.

[0059] In this embodiment, the interface RJ1 in the RJ45 transmission module realizes the bidirectional transmission function of Ethernet data through the transmitting differential signal winding and the receiving differential signal winding. The first end of the primary winding of the transmitting differential signal winding is connected to the first data transmitting differential signal end of the Ethernet control chip U5, the second end of the primary winding is connected to the second data transmitting differential signal end of the Ethernet control chip U5, the Ethernet control chip U5 transmits the generated differential signal to the secondary winding through the primary winding of the transmitting differential signal winding, and the two ends of the secondary winding of the transmitting differential signal winding are respectively connected to external network equipment for transmitting the differential signal to the network to realize data output. The receiving differential signal winding is used to realize the reception of the signal transmitted by the external network equipment. The two ends of the secondary winding of the receiving differential signal winding are connected to external network equipment for receiving the differential signal transmitted from the network equipment. The differential signal is transmitted to the primary winding through the secondary winding of the receiving differential signal winding, and then transmitted to the first data receiving differential signal end and the second data receiving differential signal end of the Ethernet control chip U5 through the first end and the second end of the primary winding, respectively, to complete the reception of the signal and transmit it to the Ethernet control chip U5 for subsequent processing. Through the electromagnetic coupling of the primary and secondary windings of the transmitting differential signal winding and the receiving differential signal winding, efficient transmission of Ethernet signals can be realized, and electrical isolation function is provided to improve the stability and anti-interference ability of data transmission. This design logic ensures the bidirectional and efficient communication of Ethernet data between the device and the external network, and optimizes the signal transmission path through the differential signal winding integrated by the interface RJ1, further enhancing the reliability and transmission performance of the system.

[0060] In summary, the transmitting differential signal winding and the receiving differential signal winding of the RJ45 transmission module can realize the transmission and reception of Ethernet signals, and the differential signal end of the primary winding is connected to the Ethernet control chip and the secondary winding is connected to the external network equipment, realizing electromagnetic isolation protection and stable Ethernet communication, thereby improving the anti-interference ability and reliability of data transmission.

[0061] Further, as shown in Figure 7 The power supply module includes an input protection unit, a step-down conversion unit, an output filter unit, and a feedback adjustment unit. The power input end of the input protection unit is connected with the power supply, the power output end of the input protection unit is connected with the power input end of the step-down conversion unit, the power output end of the step-down conversion unit is connected with the power input end of the output filter unit, the common node between the power output end of the step-down conversion unit and the power input end of the output filter unit is connected with the power signal input end of the feedback adjustment unit, and the feedback signal output end of the feedback adjustment unit is connected with the feedback signal input end of the step-down conversion unit.

[0062] In this embodiment, the power supply module realizes efficient conversion and stable output of the power supply through the synergistic effect of the input protection unit, the step-down conversion unit, the output filter unit, and the feedback adjustment unit. The power input end of the input protection unit is directly connected with the external power supply for receiving the input voltage and providing primary protection. The power output end of the input protection unit is connected to the power input end of the step-down conversion unit to transmit the protected voltage to the step-down conversion unit for voltage step-down processing. The power output end of the step-down conversion unit is connected to the power input end of the output filter unit to perform smoothing processing on the stepped-down voltage through the filter circuit, eliminate voltage fluctuations, and ensure the stability of the output voltage. At the same time, the common node between the power output end of the step-down conversion unit and the power input end of the output filter unit is connected to the power signal input end of the feedback adjustment unit for real-time acquisition of the output voltage signal for voltage feedback adjustment. The feedback adjustment unit transmits the adjusted feedback signal to the feedback signal input end of the step-down conversion unit through its feedback signal output end to assist the step-down conversion unit in dynamically adjusting the output voltage according to the feedback signal. This design provides the required power supply for the subsequent circuit through the protection function of the input protection unit and the precise step-down function of the step-down conversion unit. The output filter unit ensures the stability of the power quality, and the feedback adjustment unit further improves the precision and dynamic response capability of the output voltage through the closed-loop control mechanism, thereby providing reliable power supply guarantee for the stable operation of the industrial control equipment.

[0063] In summary, the input protection unit of the power supply module can effectively protect the power input end from overcurrent, reverse voltage, and voltage fluctuations. The input voltage is converted into stable output voltage by the step-down conversion unit, and the voltage is smoothed by the output filter unit. Finally, the stability and accuracy of the output voltage are ensured by the feedback adjustment unit, thereby improving the reliability and adaptability of the power supply system.

[0064] Further, as shown in Figure 7As shown, the input protection unit includes a fuse F1, a diode D1, a diode D2, a capacitor C2, a capacitor C3, a resistor R4 and a resistor R8, a first end of the fuse F1 is connected with a power supply, a second end of the fuse is connected with a positive end of the diode D1, a negative end of the diode D1 is connected with a negative end of the diode D2, a positive end of the diode D2 is grounded, the capacitor C2 and the capacitor C3 are respectively connected between the negative end of the diode D1 and the ground, and a voltage division acquisition network composed of the resistor R4 and the resistor R8, a signal output end of the voltage division acquisition network is connected with an enable signal input end of the step-down conversion unit.

[0065] In the embodiment, the input protection unit realizes the protection and control functions of the input power supply through the fuse F1, the diode D1, the diode D2, the capacitor C2, the capacitor C3 and the voltage division acquisition network composed of the resistor R4 and the resistor R8. The first end of the fuse F1 is directly connected with an external power supply, for receiving an input voltage and providing overcurrent protection in an overload condition, the second end of the fuse is connected with the positive end of the diode D1, to ensure that the current can flow smoothly to the subsequent circuit under normal circumstances. The negative end of the diode D1 is connected with the negative end of the diode D2, and the positive end of the diode D2 is grounded, for providing reverse voltage protection when the input voltage is reversed, to prevent circuit damage caused by incorrect connection of the power supply. The capacitor C2 and the capacitor C3 are respectively connected in parallel between the negative end of the diode D1 and the ground, and these capacitors are used for filtering the input voltage, reducing high-frequency noise in the power supply input, and ensuring that the voltage signal transmitted to the subsequent circuit is stable and reliable. At the same time, the negative end of the diode D1 is also connected with the ground through the voltage division acquisition network composed of the resistor R4 and the resistor R8, the voltage division acquisition network is used for dividing the input voltage and outputting the processed signal to the enable signal input end of the step-down conversion unit, and the voltage signal of the acquisition network is used to control the start and stop state of the step-down conversion unit in real time, so as to dynamically adjust the power supply according to the state of the input power supply. Through this structural design, the input protection unit not only realizes the overcurrent protection, reverse connection protection and filtering and stabilizing functions of the input power supply, but also provides a dynamic feedback signal of the input voltage for the subsequent power supply module through the voltage division acquisition network, to ensure that the entire power supply system operates efficiently under the premise of safety and stability.

[0066] In summary, the input protection unit can realize multi-layer protection of the input power supply through the fuse, diode and voltage division network and other elements, protect the circuit through the fuse when the power supply is overloaded, protect the circuit through the diode when the voltage is reversed, and realize voltage acquisition and generation of start and stop control signals through the voltage division network, so as to effectively improve the safety and intelligent level of the power supply module.

[0067] Further, as Figure 7As shown, the voltage reduction conversion unit at least includes a voltage reduction conversion chip U2, the feedback adjustment unit includes a resistor R6 and a resistor R7, the common node between the power output end of the voltage reduction conversion chip U2 and the power input end of the output filter unit is connected with the first end of the resistor R6, the second end of the resistor R6 is connected with the first end of the resistor R7, the second end of the resistor R7 is grounded, and the common node between the second end of the resistor R6 and the first end of the resistor R7 is connected with the feedback signal input end of the voltage reduction conversion chip U2.

[0068] In the embodiment, the voltage reduction conversion chip U2 in the voltage reduction conversion unit provides a stable voltage reduction output to the power input end of the output filter unit through the power output end, for further filtering and voltage stabilization processing. The common node between the power output end and the power input end of the output filter unit is connected with the first end of the resistor R6 in the feedback adjustment unit, the second end of the resistor R6 is connected with the first end of the resistor R7, forming part of the feedback adjustment network, for realizing the functions of voltage division collection and feedback adjustment of the output voltage. The second end of the resistor R7 is grounded, completing the loop design of the feedback circuit, while ensuring the stability of the divided voltage signal in the electrical aspect and the accuracy of the reference ground level. The common node between the second end of the resistor R6 and the first end of the resistor R7 is connected with the feedback signal input end of the voltage reduction conversion chip U2, which provides the feedback signal adjusted by the voltage division network, and the feedback signal represents the real-time state of the output voltage. By transmitting to the feedback signal input end, the voltage reduction conversion chip U2 can dynamically adjust its output power according to the comparison result of the feedback signal and the internal reference voltage, so as to realize the closed-loop control of the output voltage. This connection relationship ensures the stability and accuracy of the output voltage, and realizes the dynamic monitoring and real-time adjustment of the output voltage through the resistor network in the feedback adjustment unit, further improving the response speed and load adaptability of the entire voltage reduction conversion unit, thereby providing high-quality power supply support for the subsequent circuit.

[0069] In summary, the feedback resistor network in the voltage reduction conversion unit can realize the accurate adjustment of the output voltage, and the voltage reduction conversion chip can convert and stabilize the input voltage, while the feedback adjustment unit can realize the closed-loop control of the voltage, thereby ensuring the accuracy and reliability of the voltage output and meeting the power supply requirements of the industrial control equipment.

[0070] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An industrial control device IO port data acquisition circuit, characterized in that, The IO port data acquisition circuit of the industrial control device comprises an external input module, a WIFI control module, an Ethernet control module and an RJ45 transmission module, the external input module comprises a plurality of photoelectric switch management units arranged in parallel, a signal input end of the photoelectric switch management unit is used for acquiring an acquisition signal of a corresponding external sensor, a signal output end of the photoelectric switch management unit is connected with a signal input end of the WIFI control module, the photoelectric switch management unit is used for converting the acquisition signal into a standard electrical signal and transmitting the standard electrical signal to the WIFI control module based on the signal output end of the photoelectric switch management unit, so as to realize data transmission operation in a WIFI communication mode, a data communication end of the WIFI control module is connected with a first data communication end of the Ethernet control module, a second data communication end of the Ethernet control module is connected with a data communication end of the RJ45 transmission module, so as to send standard network data to the RJ45 transmission module, and the RJ45 transmission module is used for transmitting the standard network data to an external network device through a corresponding RJ45 interface, so as to realize data transmission operation in an Ethernet communication mode. After the acquisition signal is converted into a standard electrical signal by the internal circuit of the photoelectric switch management unit, the acquisition signal is transmitted from the signal output end of the photoelectric switch management unit to the signal input end of the WIFI control module, so as to complete preliminary processing and transmission of the acquisition signal. The WIFI control module packs and transmits the received standard electrical signal through the built-in wireless communication function, and interacts with the Ethernet control module, so as to establish a data switching path between wireless communication and wired communication. When data needs to be transmitted in a wired mode, the WIFI control module generates a data format conforming to the Ethernet communication standard, and transmits the data format to the RJ45 transmission module through the Ethernet control module. The RJ45 transmission module is used for processing data sending signals from the Ethernet control module and receiving signals returned from the external network, so as to realize bidirectional transmission of data.

2. The industrial control device IO port data acquisition circuit according to claim 1, characterized in that, The photoelectric switch management unit comprises at least one two-way photoelectric switch, two signal input channels and a photosensitive triode are arranged in parallel on the two-way photoelectric switch, a light-emitting diode is arranged in each signal input channel, the conduction directions of the light-emitting diodes in the two signal input channels are different, a first conduction end of the photosensitive triode is connected with a power supply, a common node between the first conduction end of the photosensitive triode and the power supply is connected with a signal input end of the WIFI control module, a second conduction end of the photosensitive triode is grounded, and a controlled end of the photosensitive triode is used for receiving light signals emitted by the light-emitting diode in one of the signal input channels.

3. The industrial control device IO port data acquisition circuit according to claim 2, characterized in that, Four photoelectric switch management units arranged in parallel are packaged into one photoelectric switch input sub-module, one signal stabilizing resistor sub-module is connected with the photoelectric switch input sub-module, the signal stabilizing resistor sub-module comprises a plurality of pull-up resistors arranged in parallel, a first end of the pull-up resistor is connected with the power supply, and a second end of the pull-up resistor is connected with the first conduction end of the photosensitive triode.

4. The industrial computer IO port data acquisition circuit of claim 1, wherein, The IO port data acquisition circuit of the industrial control equipment further comprises a clock module, the clock module comprises a battery interface J1, a clock chip U6 and a crystal oscillator assembly Y1, the battery interface J1 is used for connecting an external battery, and the clock chip U6 is provided with continuous power supply to realize clock keeping in the case of power failure, an oscillator input end of the clock chip U6 is connected with a first end of the crystal oscillator assembly Y1, a second end of the crystal oscillator assembly Y1 is connected with an oscillator output end of the clock chip U6, and I 2 The C communication interface is used for realizing the read-write interaction of clock configuration and time data between the WIFI control module and the clock chip U6. 2 The C communication interface is used for realizing the read-write interaction of clock configuration and time data between the WIFI control module and the clock chip U6.

5. The industrial computer IO port data acquisition circuit according to claim 4, characterized in that, The second end of the crystal oscillator assembly Y1 is connected with the ground through a capacitor C19, and the oscillator input end of the clock chip U6 is connected with the ground through a capacitor C18.

6. The industrial computer IO port data acquisition circuit of claim 1, wherein, The WIFI control module comprises a WIFI control chip U4, and the Ethernet control module comprises an Ethernet control chip U5. The clock synchronization end of the Ethernet control chip U5 is connected with the clock synchronization end of the WIFI control chip U4, so that the Ethernet control chip U5 shares the clock signal with the WIFI control chip U4. The reset end of the Ethernet control chip U5 is connected with the reset end of the WIFI control chip U4, so that the Ethernet control chip U5 and the WIFI control chip U4 realize unified reset management. The transmission enable communication end of the Ethernet control chip U5 is connected with the transmission enable communication end of the WIFI control chip U4, so as to determine whether to perform data transmission operation with external network equipment through the WIFI control chip U4 or through the Ethernet control chip U5.

7. The industrial computer IO port data acquisition circuit of claim 6, wherein, The RJ45 transmission module comprises an interface RJ1, which is provided with a transmission differential signal winding and a reception differential signal winding. The first end of the primary winding in the transmission differential signal winding is connected with the first data transmission differential signal end of the Ethernet control chip U5, the second end of the primary winding in the transmission differential signal winding is connected with the second data transmission differential signal end of the Ethernet control chip U5, the first end and the second end of the secondary winding in the transmission differential signal winding are connected with external network equipment, the first end of the primary winding in the reception differential signal winding is connected with the first data reception differential signal end of the Ethernet control chip U5, the second end of the primary winding in the reception differential signal winding is connected with the second data reception differential signal end of the Ethernet control chip U5, and the first end and the second end of the secondary winding in the reception differential signal winding are connected with external network equipment.

8. The industrial computer IO port data acquisition circuit of claim 1, wherein, The industrial control device IO port data acquisition circuit further comprises a power supply module, the power supply module comprises an input protection unit, a step-down conversion unit, an output filter unit and a feedback adjustment unit, the power supply input end of the input protection unit is connected with a power supply, the power supply output end of the input protection unit is connected with the power supply input end of the step-down conversion unit, the power supply output end of the step-down conversion unit is connected with the power supply input end of the output filter unit, the common node between the power supply output end of the step-down conversion unit and the power supply input end of the output filter unit is connected with the power signal input end of the feedback adjustment unit, and the feedback signal output end of the feedback adjustment unit is connected with the feedback signal input end of the step-down conversion unit.

9. The industrial computer IO port data acquisition circuit of claim 8, wherein, The input protection unit comprises a fuse F1, diodes D1 and D2, capacitors C2 and C3, resistors R4 and R8, a first end of the fuse F1 is connected with a power supply, a second end of the fuse is connected with a positive electrode end of the diode D1, a negative electrode end of the diode D1 is connected with a negative electrode end of the diode D2, a positive electrode end of the diode D2 is grounded, the negative electrode end of the diode D1 is connected with the capacitors C2 and C3 respectively, and a voltage dividing and collecting network composed of the resistors R4 and R8, and a signal output end of the voltage dividing and collecting network is connected with an enable signal input end of the step-down conversion unit.

10. The industrial computer IO port data acquisition circuit of claim 8, wherein, The step-down conversion unit at least comprises a step-down conversion chip U2, the feedback adjusting unit comprises resistors R6 and R7, a common node between a power output end of the step-down conversion chip U2 and a power input end of the output filter unit is connected with a first end of the resistor R6, a second end of the resistor R6 is connected with a first end of the resistor R7, a second end of the resistor R7 is grounded, and a common node between the second end of the resistor R6 and the first end of the resistor R7 is connected with a feedback signal input end of the step-down conversion chip U2.

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