Dry contact acquisition device based on dynamic waves, state judgment method and electronic equipment

Abstract

The invention relates to a dry contact acquisition device based on dynamic waves, a state judgment method and electronic equipment. The device comprises at least one acquisition circuit and a core calculation module, the core calculation module is used for judging the state of a dry contact and comprises three FPGA units, namely a first FPGA unit, a second FPGA unit and a third FPGA unit; each acquisition circuit comprises an upper transmitting optocoupler, a lower transmitting optocoupler, an upper back-lighting optocoupler and a lower back-lighting optocoupler. The third FPGA unit sends a dynamic wave to a sending optocoupler of the acquisition circuit, and the acquisition circuit acquires a signal of the dynamic wave passing through a dry contact through a return optocoupler and sends the signal to the first FPGA unit and the second FPGA unit which are in redundancy configuration; and the first FPGA unit and the second FPGA unit compare the received signals and judge the state of the dry contact in combination with the dynamic wave sent by the third FPGA unit. Compared with the prior art, the system has the advantages of simple structure, low cost, simultaneous acquisition of multiple nodes, accurate judgment of the dry contact state and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit dry contact acquisition, and in particular to a dry contact acquisition device based on dynamic waves, a state judgment method and electronic equipment. Background Art

[0002] Dry contacts in rail transit refer to an electrical connection method, which is usually used for switch input in signal systems. Dry contacts are passive contacts that output a switch signal when the state of an external device changes. This type of contact does not require external power supply, and only changes the on-off state of the circuit through the mechanical switch action inside the device. In rail transit signal systems, dry contacts are often used for status monitoring and control of various equipment. For example, when a train enters a certain area, the dry contact triggers the corresponding signal light change or alarm device. The stability and reliability of dry contacts are crucial to ensure the safety of train operation, and any misjudgment may lead to serious consequences.

[0003] Traditional vehicles determine the status of equipment by collecting the voltage status of dry contacts. This is limited by the hardware architecture design, the equipment is highly complex, and there are many fault nodes for safe collection. When the status of multiple collection nodes is collected, the complexity of the system design will be greatly increased.

[0004] After searching, the Chinese invention patent application publication number CN112098887B discloses a rail transit dry contact state judgment system, including: a control circuit; a signal excitation circuit connected to the control circuit and used to send AC current under the control of the control circuit; a dry contact circuit connected to the signal excitation circuit; a current acquisition circuit connected to the dry contact circuit and used to receive feedback current after the AC current passes through the dry contact circuit; a first current limiting resistor, which is arranged in series with the dry contact circuit; the dry contact circuit includes: a rectifier diode, which is connected in parallel with the dry contact; a second current limiting resistor, which is connected in series with the dry contact circuit; a second current limiting resistor ... The control circuit is also connected to the current acquisition circuit, and is used to judge the state of the dry contact in the dry contact circuit according to the feedback current: if the feedback current is a direct current, the dry contact is judged to be disconnected; if the feedback current is an alternating current whose current value is small in half a cycle and large in the other half a cycle, the dry contact is judged to be closed; if the feedback current is an alternating current whose current value changes regularly within the cycle, it is judged that a short circuit occurs between the first current limiting resistor and the dry contact circuit; if the feedback current is 0, it is judged that the system is open-circuited. This existing patent application has the problems of high system design complexity and inaccurate state judgment due to the lack of processing of the acquisition results.

[0005] How to achieve low-cost, simple-structure dry contact acquisition and accurately determine the status of the dry contacts has become a technical problem that needs to be solved. Summary of the invention

[0006] The purpose of the present invention is to provide a dry contact acquisition device based on dynamic waves in order to overcome the defects of the above-mentioned prior art.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] According to one aspect of the present invention, a dry contact acquisition device based on dynamic waves is provided, the device comprising at least one acquisition circuit and a core computing module; the core computing module is used to determine the state of the dry contact, and comprises three FPGA units, namely a first FPGA unit, a second FPGA unit and a third FPGA unit; each acquisition circuit comprises an upper and lower sending optical coupler and an upper and lower returning optical coupler;

[0009] The third FPGA unit sends the dynamic wave to the sending optical coupler of the acquisition circuit, and the acquisition circuit collects the signal of the dynamic wave after passing through the dry contact through the return optical coupler, and sends it to the first FPGA unit and the second FPGA unit of the redundant configuration;

[0010] The first FPGA unit and the second FPGA unit compare the received signals with each other, and determine the dry contact status in combination with the dynamic wave sent by the third FPGA unit.

[0011] Preferably, each acquisition circuit includes two pairs of upper and lower return optical couplers, one end of which is respectively connected to the first FPGA unit and the second FPGA unit, and the other end is connected to the dry contact.

[0012] Preferably, the other end of the upper return optocoupler is connected to the upper end of the dry contact, and the other end of the lower return optocoupler is connected to the lower end of the dry contact.

[0013] Preferably, the third FPGA unit sends dynamic waves to the upper sending optocoupler and the lower sending optocoupler of the acquisition circuit respectively according to the set timing, and the dynamic waves of the upper sending optocoupler and the lower sending optocoupler are designed differently.

[0014] Preferably, the three FPGA units perform real-time data exchange via an internal bus.

[0015] Preferably, when the dry contact is in a closed state, the first FPGA unit and the second FPGA unit both simultaneously collect the dynamic waves transmitted by the upper transmitting optocoupler and the lower transmitting optocoupler.

[0016] Preferably, when the dry contact is in an open state, if the third FPGA unit sends an optocoupler upward to emit a dynamic wave, the first FPGA unit and the second FPGA unit both collect the dynamic wave sent by the upper sending optocoupler only through the upper return optocoupler; if the third FPGA unit sends an optocoupler downward to emit a dynamic wave, the first FPGA unit and the second FPGA unit both collect the dynamic wave sent by the lower sending optocoupler only through the lower return optocoupler.

[0017] Preferably, the device further comprises a communication module connected to the core computing module, and the first FPGA unit and the second FPGA unit transmit the collection and status judgment results to the system host in real time through the communication module.

[0018] Preferably, the device further comprises an external interface and an internal interface, the device is connected to an external load device via the external interface and is connected to a system host via the internal interface;

[0019] The external interface is connected to the acquisition circuit.

[0020] Preferably, the device further comprises a power management module connected to the core computing unit, wherein the power management module is used for detecting the temperature and voltage of the core computing module to ensure that the core computing module operates within a reliable voltage and temperature range.

[0021] According to another aspect of the present invention, a method for determining a dry contact state based on a dynamic wave is provided, the method comprising:

[0022] The third FPGA unit of the core computing module sends dynamic waves to the upper sending optical coupler and the lower sending optical coupler of the acquisition circuit respectively according to the set timing;

[0023] The first FPGA unit and the second FPGA unit of the core computing module receive dynamic waves through the upper and lower return photocouplers of the acquisition circuit respectively, and share the received acquisition information with each other;

[0024] The first FPGA unit and the second FPGA unit of the core computing module compare the received collected information with each other and determine the dry contact status.

[0025] Preferably, the process of determining the dry contact state includes:

[0026] When the third FPGA unit sends a dynamic wave from the optocoupler upward, if it can receive the dynamic waves sent by the upper and lower optocouplers at the same time, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in a closed state and is in normal operation; if it can only receive the dynamic wave sent by the upper optocoupler, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in an open state and is in normal operation; otherwise, the dry contacts are in a fault state.

[0027] More preferably, the process of determining the dry contact state further includes:

[0028] When the third FPGA unit sends a dynamic wave from the optocoupler downward, if it can receive the dynamic waves sent by the upper and lower optocouplers at the same time, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in a closed state and is in normal operation; if it can only receive the dynamic wave sent by the lower optocoupler, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in an open state and is in normal operation; otherwise, the dry contacts are in a fault state.

[0029] According to a third aspect of the present invention, there is provided an electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the method described above is implemented when the processor executes the program.

[0030] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the program implements the method described when executed by a processor.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1) The dry contact acquisition device of the present invention realizes the state acquisition of the dry contact by means of dynamic waves, supports simultaneous acquisition of multiple nodes, and designs redundantly configured FPGA units for acquisition, mutual comparison and dry contact state judgment. It has a simple structure, low cost, and simple maintenance, and improves the accuracy and robustness of dry contact state acquisition.

[0033] 2) The present invention sends differential dynamic waves to the upper sending optocoupler and the lower sending optocoupler of the acquisition circuit respectively according to the set timing, and collects the signal of the dynamic wave after passing through the dry contact. The core calculation module combines the sending dynamic wave and the receiving signal to make a judgment and compare the judgment results, so as to realize accurate judgment of the dry contact state and troubleshoot the dry contact fault.

[0034] 3) The present invention can realize simultaneous data collection of multiple nodes, thereby improving the space utilization rate of the dry contact data collection device and the cost performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the dry contact acquisition device in the present invention;

[0036] Figure 2 It is a schematic diagram of the dry contact acquisition principle based on the core computing module in the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0038] This embodiment relates to a dry contact acquisition device based on dynamic waves, which can realize safe acquisition of dry contacts of vehicle equipment, has a simple structure, does not require any auxiliary equipment, can realize simultaneous acquisition of multiple nodes, has low cost and simple maintenance.

[0039] like Figure 1 , the device includes an external interface, at least one acquisition circuit, a core computing module, a communication module, a power management module and an internal interface;

[0040] The acquisition circuit and the core computing module respectively realize the acquisition and judgment of the dry contact status. The core computing module uses three FPGA units to realize status judgment, wherein the three FPGA units are respectively a first FPGA unit, a second FPGA unit and a third FPGA unit.

[0041] The communication module includes a CPU and a network interface, which are used to upload the collected data and status judgment results to the system host (not shown in the figure) through the internal interface.

[0042] The power management module is used to detect the temperature and voltage of the core computing module to ensure that the core computing module operates within a reliable voltage and temperature range.

[0043] The device is connected to external load devices through external interfaces.

[0044] like Figure 2 The schematic diagram of the acquisition structure of the core computing module shows the acquisition principle of one of the acquisition circuits. When multiple acquisitions are to be realized simultaneously, multiple acquisition circuits can be copied, and the design of each acquisition circuit is consistent. Each acquisition circuit includes two pairs of upper and lower return photocouplers, one end of which is connected to the first FPGA unit and the second FPGA unit respectively, and the other end is connected to the dry contact. The other end of the upper return photocoupler is connected to the upper end of the dry contact, and the other end of the lower return photocoupler is connected to the lower end of the dry contact.

[0045] The third FPGA unit sends dynamic waves to the upper sending optocoupler and the lower sending optocoupler of the multi-channel acquisition circuit according to the set timing, and the dynamic waves of the upper sending optocoupler and the lower sending optocoupler are designed differently. The set timing includes the upper sending optocoupler sending the dynamic wave first and then the lower sending optocoupler sending the dynamic wave, or the lower sending optocoupler sending the dynamic wave first and then the upper sending optocoupler sending the dynamic wave.

[0046] The first FPGA unit and the second FPGA unit are two acquisition and judgment units of the device, respectively, and realize real-time data interaction with the third FPGA unit through the internal bus to realize the state judgment of the pulse signal;

[0047] The first FPGA unit and the second FPGA unit are redundantly configured, and will share the data they receive with each other. By comparing the judgment results, they can realize redundant collection and judgment of the dry contact collection status, and realize real-time transmission of the collection status through the communication module.

[0048] When the dry contact state is closed, the first FPGA unit can simultaneously collect the dynamic waves (ie, pulse signals) sent by the upper sending optocoupler and the lower sending optocoupler, and the second FPGA unit can simultaneously collect the dynamic waves sent by the upper sending optocoupler and the lower sending optocoupler.

[0049] When the dry contact state is open, when the upper transmission optocoupler of the third FPGA unit sends a dynamic wave, the first FPGA unit collects the dynamic wave sent by the upper transmission optocoupler through the upper return optocoupler, and FPGA2 also collects the dynamic wave sent by the upper transmission optocoupler through the upper return optocoupler; when the lower transmission optocoupler of the third FPGA unit sends a dynamic wave, the first FPGA unit collects the dynamic wave sent by the lower transmission optocoupler through the lower return optocoupler, and the second FPGA unit also collects the dynamic wave sent by the lower transmission optocoupler through the lower return optocoupler. The rest of the states are abnormal states.

[0050] The dynamic waves sent by the third FPGA unit and the signals collected by the first FPGA unit and the second FPGA unit are summarized to determine the state of the dry contact and whether there is a fault. The judgment basis is: when the third FPGA unit sends the dynamic wave of the optocoupler upward, if it can receive the dynamic wave sent by the upper return optocoupler and the lower return optocoupler, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in a closed state and is in a normal operating state; if it can only receive the dynamic wave sent by the upper return optocoupler, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in an open state and is in a normal operating state; otherwise, the dry contact is in a fault state.

[0051] When the third FPGA unit sends a dynamic wave from the optocoupler downward, if it can receive the dynamic waves sent by the upper and lower optocouplers, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, the dry contact is in a closed state and is in normal operation; if it can only receive the dynamic wave sent by the lower optocoupler, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, the dry contact is in an open state and is in normal operation; otherwise, the dry contacts are in a fault state.

[0052] If the status judgment results of the first FPGA unit and the second FPGA unit are inconsistent, it means that the dry contact state is unstable and there is a fault.

[0053] The design of the sending optocoupler and the returning optocoupler realizes the model isolation between the internal and external devices.

[0054] This embodiment also relates to a method for determining a dry contact state based on a dynamic wave, the method comprising:

[0055] The third FPGA unit of the core computing module sends dynamic waves to the upper sending optical coupler and the lower sending optical coupler of the acquisition circuit respectively according to the set timing;

[0056] The first FPGA unit and the second FPGA unit of the core computing module receive dynamic waves through the upper and lower return photocouplers of the acquisition circuit respectively, and share the received acquisition information with each other;

[0057] The first FPGA unit and the second FPGA unit of the core computing module compare the received collected information with each other and determine the dry contact status.

[0058] The electronic device of the present invention includes a central processing unit (CPU), which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) or loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0059] Multiple components in the device are connected to the I / O interface, including: input units, such as keyboards, mice, etc.; output units, such as various types of displays, speakers, etc.; storage units, such as disks, optical disks, etc.; and communication units, such as network cards, modems, wireless communication transceivers, etc. The communication unit allows the device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunication networks.

[0060] The processing unit performs the various methods and processes described above. For example, in some embodiments, the method can be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program can be loaded and / or installed on the device via a ROM and / or a communication unit. When the computer program is loaded into RAM and executed by the CPU, one or more steps of the method described above can be performed. Alternatively, in other embodiments, the CPU can be configured to perform the method in any other appropriate manner (e.g., by means of firmware).

[0061] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0062] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0063] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0064] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A dry contact acquisition device based on dynamic waves, characterized in that: The device comprises at least one acquisition circuit and a core computing module; the core computing module is used to determine the dry contact state, and comprises three FPGA units, namely a first FPGA unit, a second FPGA unit and a third FPGA unit; each acquisition circuit comprises an upper and lower sending optical coupler and an upper and lower returning optical coupler; The third FPGA unit sends the dynamic wave to the transmission optical coupler of the acquisition circuit, and the acquisition circuit collects the signal of the dynamic wave after passing through the dry contact through the return optical coupler, and sends it to the first FPGA unit and the second FPGA unit of the redundant configuration; The first FPGA unit and the second FPGA unit share the received signal, and respectively determine the dry contact status in combination with the dynamic wave sent by the third FPGA unit.

2. A dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: Each acquisition circuit includes two pairs of upper and lower return optical couplers, one end of which is connected to the first FPGA unit and the second FPGA unit respectively, and the other end is connected to the dry contact.

3. A dry contact acquisition device based on dynamic waves according to claim 2, characterized in that: The other end of the upper return optical coupler is connected to the upper end of the dry contact, and the other end of the lower return optical coupler is connected to the lower end of the dry contact.

4. The dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: The third FPGA unit sends dynamic waves to the upper sending optocoupler and the lower sending optocoupler of the acquisition circuit respectively according to the set timing, and the dynamic waves of the upper sending optocoupler and the lower sending optocoupler are designed differently.

5. The dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: The three FPGA units exchange data in real time via an internal bus.

6. The dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: When the dry contact is in a closed state, the first FPGA unit and the second FPGA unit both collect the dynamic waves sent by the upper transmitting optocoupler and the lower transmitting optocoupler at the same time.

7. The dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: When the dry contact is in the open state, if the third FPGA unit sends an optocoupler to emit a dynamic wave upward, the first FPGA unit and the second FPGA unit only collect the dynamic wave sent by the upper sending optocoupler through the upper return optocoupler; if the third FPGA unit sends an optocoupler to emit a dynamic wave downward, the first FPGA unit and the second FPGA unit only collect the dynamic wave sent by the lower sending optocoupler through the lower return optocoupler.

8. The dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: The device also includes a communication module connected to the core computing module, and the first FPGA unit and the second FPGA unit transmit the collection and status judgment results to the system host in real time through the communication module.

9. The dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: The device also includes an external interface and an internal interface, the device is connected to an external load device via the external interface and is connected to a system host via the internal interface; The external interface is connected to the acquisition circuit.

10. The dry contact acquisition device based on dynamic waves according to claim 1, characterized in that: The device also includes a power management module connected to the core computing unit, and the power management module is used for temperature and voltage detection of the core computing module to ensure that the core computing module operates within a reliable voltage and temperature range.

11. A state judgment method using a dry contact acquisition device based on dynamic waves according to any one of claims 1 to 10, characterized in that: The method comprises: The third FPGA unit of the core computing module sends dynamic waves to the upper sending optical coupler and the lower sending optical coupler of the acquisition circuit respectively according to the set timing; The first FPGA unit and the second FPGA unit of the core computing module receive dynamic waves through the upper and lower return photocouplers of the acquisition circuit respectively, and share the received acquisition information with each other; The first FPGA unit and the second FPGA unit of the core computing module compare the received collected information with each other and determine the dry contact status.

12. The method according to claim 11, characterized in that The process of determining the dry contact state includes: When the third FPGA unit sends a dynamic wave from the optocoupler upward, if it can receive the dynamic waves sent by the upper and lower optocouplers at the same time, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in a closed state and is in normal operation; if it can only receive the dynamic wave sent by the upper optocoupler, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in an open state and is in normal operation; otherwise, the dry contacts are in a fault state.

13. A dry contact acquisition device based on dynamic waves according to claim 12, characterized in that: The process of determining the dry contact state also includes: When the third FPGA unit sends a dynamic wave from the optocoupler downward, if it can receive the dynamic waves sent by the upper and lower optocouplers at the same time, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in a closed state and is in normal operation; if it can only receive the dynamic wave sent by the lower optocoupler, and the signals collected by the first FPGA unit and the second FPGA unit are consistent, then the dry contact is in an open state and is in normal operation; otherwise, the dry contacts are in a fault state.

14. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the program, the method according to any one of claims 11 to 13 is implemented.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 11 to 13 is implemented.

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