On-site signal acquisition and storage device of water electrolysis hydrogen production equipment

Abstract

An in-situ signal acquisition and storage device for water electrolysis hydrogen production equipment comprises a wiring terminal strip connected with an inlet wire and an outlet wire and used for realizing basic functions of an explosion-proof junction box; the precise differential voltage signal acquisition part is used for converting an analog quantity signal of the sensor into a digital quantity; and the data storage part is used for recording and storing the acquired sensor digital signals. The device can be installed in an on-site explosion-proof junction box, and real-time acquisition, recording and display are carried out on analog quantity signals of a sensor connected to the device on the premise that sensor signal transmission of an original control system is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to weak signal sampling, recording, display technical field, especially in kind of water electrolysis hydrogen production equipment voltage and current signal collection and storage device. BACKGROUND

[0002] The existing water electrolysis hydrogen production equipment on-site explosion-proof terminal box only has the effect of connecting the incoming and outgoing cables, and only has the terminal block in the box, which is used to connect the hydrogen production site frame and the control system, the incoming line of which is the cable of each sensor on the hydrogen production equipment frame, and the outgoing line is a multi-core control cable connected to the control cabinet or DCS cabinet. The equipment does not have the functions of signal collection, data recording and on-site inspection. If the data storage device of the control cabinet is damaged, the operation data of the equipment will be lost, and it is not possible to directly observe whether the sensor is working normally.

[0003] In addition, the current multiple large-scale hydrogen production equipment projects all adopt the form of DCS control, and our party only provides process equipment but does not provide automatic control equipment, and the DCS manufacturer does not provide the operation parameters of our equipment, so that we cannot obtain the long-time operation data of the equipment, which affects the technical improvement and process update of the equipment. SUMMARY

[0004] The present disclosure provides a kind of hydrogen production equipment on-site signal collection and storage device, mainly for voltage, current these two kinds of analog signals, on the basis of not affecting original industrial signal transmission main loop, to the sensor analog signal connected in this device is collected, recorded, displayed.

[0005] The device can be installed in the on-site explosion-proof terminal box, and the operation data of each sensor can be recorded and stored in real time without affecting the transmission of the sensor signal of the original control system, and a local display screen interface is provided, so that the data parameters connected to the device can be directly observed, ensuring the safety of the equipment operation data and facilitating the maintenance of the operation and maintenance personnel.

[0006] The hydrogen production equipment on-site signal collection and storage device provided by the present disclosure comprises:

[0007] The incoming terminal block is used to connect the voltage or current sensor cable of the hydrogen production frame.

[0008] The outgoing terminal block is used to connect the signal cable of the remote control system.

[0009] The voltage signal acquisition module is used to convert the sensor analog signal into digital signal, which comprises an operational amplifier circuit and a data acquisition part.

[0010] The data storage device is used to record the collected sensor digital signal.

[0011] Among them:

[0012] For collecting voltage signal, one of the input terminals is shorted with one of the output terminals, and is connected to the operational amplifier circuit respectively, and the output of the operational amplifier circuit is connected to the data collection part, and the analog quantity is converted into digital quantity, and then is recorded in the data storage device;

[0013] For collecting current signal, one of the input terminals is shorted with one of the output terminals, and the other input terminal is connected with one output terminal through a resistor; the voltage drop signal between the two ends of the resistor is connected to the operational amplifier circuit, and the output of the operational amplifier circuit is connected to the data collection part, and the analog quantity is converted into digital quantity, and then is recorded in the data storage device.

[0014] Further, the terminal rows are arranged as upper input terminal rows and lower output terminal rows, each of the terminal rows comprises two layers of terminals, the terminal holes of the two layers of terminals are shorted, one of the terminals is used for wiring, and the other terminal is used for later measurement.

[0015] Further, the operational amplifier circuit adopts a differential voltage conversion circuit with high input impedance.

[0016] Further, the resistor adopts a parallel connection of two precision resistors, so that the signal transmission of the original hydrogen production equipment is not affected when a single resistor is damaged.

[0017] Further, the data collection part adopts a single-chip microcomputer, which can complete the sampling of 16 channels of analog signals at the same time.

[0018] Further, the data storage device adopts an SD card.

[0019] Further, a screen interface is arranged in the input terminal row, which is used for connecting a screen.

[0020] The screen interface is arranged in the input terminal row, and the screen interface sends the collected signal to the screen through serial communication, and the other end of the interface is connected with the data collection part.

[0021] Further, the screen interface is used for the configuration of the collection and storage of related parameters of the device.

[0022] Further, a 24V power supply port is arranged in the output terminal row, which is used for supplying power to the circuit board.

[0023] Compared with the prior art, the beneficial effects of the present disclosure are: (1) the wiring terminal row in the explosion-proof terminal box can be replaced, the original function of the explosion-proof terminal box is realized, the incoming line and the outgoing line cables are connected; under the premise of not affecting the cable signal transmission from the sensor to the control system main loop, through the circuit designed by the present disclosure, the voltage and current sensor signals connected to the device are collected in real time; (2) the collected signals can be stored and recorded; (3) a local display screen interface is provided, and the sensor signals currently connected to the device can be displayed by plugging in the screen, which facilitates the maintenance personnel to check whether the sensor working through the device is normal; (4) simple modification; (5) low cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description of exemplary embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which like reference characters refer to the like parts throughout the different views.

[0025] Figure 1 The voltage signal acquisition channel schematic diagram in the exemplary embodiment according to the present disclosure is shown in FIG. 1.

[0026] Figure 2 The current signal acquisition channel schematic diagram is shown in FIG. 2.

[0027] Figure 3 The overall appearance schematic diagram of the device is shown in FIG. 3.

[0028] Figure 4 The actual application diagram of the device is shown in FIG. 4. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] The present disclosure provides a hydrogen production equipment on-site signal acquisition and storage device, which is mainly applied to water electrolysis hydrogen production equipment and can be installed in the explosion-proof terminal box on site of the water electrolysis hydrogen production equipment. The device mainly collects, records and displays the sensor analog signals connected to the device without affecting the original industrial signal transmission main loop for voltage and current analog signals.

[0031] In an exemplary embodiment:

[0032] It mainly consists of three parts: first, the terminal block connecting the incoming line and the outgoing line, realizing the basic function of the explosion-proof junction box; second, the precision differential voltage signal acquisition, which converts the analog signal of the sensor into a digital signal; and third, the data storage function, which records the acquired digital signal of the sensor into an SD card.

[0033] The specific structure is as follows:

[0034] 1. The schematic diagram for voltage signals is attached. Figure 1 As shown

[0035] Figure 1 This diagram illustrates the principle of acquiring and recording a voltage signal from a single sensor. The instrument's cable connects to the input terminal of this device, while the external control system's cable connects to the output terminal. The instrument's voltage signal is split into positive and negative terminals and fed into an operational amplifier circuit with high input impedance. The output of the operational amplifier circuit is then sent to the data acquisition section, where the analog signal is converted to a digital signal and recorded to an SD card. A screen connected to the device's display interface displays the connected sensor signal for easy observation.

[0036] 2. The schematic diagram for current signals is attached. Figure 2 As shown:

[0037] Figure 2 This diagram illustrates the principle of acquiring and recording a current signal from a single sensor. The instrument's cable connects to the input terminal of this device, while the external control system's cable connects to the output terminal. The current signal flows from terminal 9 of the control system, through the positive and negative terminals of the instrument, through two parallel resistors, and finally back to terminal 10 of the control system. This results in a voltage drop across the two parallel resistors. This voltage drop is connected to a differential operational amplifier circuit with high input impedance. The output of the operational amplifier is sent to the data acquisition section, where the analog signal is converted to a digital signal and recorded on an SD card. Connecting the screen to the device's display interface allows for the display of the connected sensor signal, facilitating observation.

[0038] 3. The external appearance of the device is shown in the attached figure. Figure 3 As shown:

[0039] The device is designed with two rows of terminals: an upper inlet terminal block and a lower outlet terminal block. Each terminal block consists of two layers of terminals, with the upper and lower wiring holes of each layer short-circuited. This facilitates wiring one terminal while the other is measured later. Specifically:

[0040] (1) The first two rows of terminals of the incoming line are screen interfaces. After plugging in the screen interface, you can observe through the local screen; the first two terminals of the outgoing line are 24V power ports to power the circuit board.

[0041] (2) The incoming terminal and the outgoing terminal are each 1 group of 10 terminals, and the incoming line and the outgoing line are each 4 groups, and a pluggable terminal strip is adopted.

[0042] In the 1 group of terminal strips, every 2 columns are a pair, forming a two-wire sensor signal loop, and 1 group of terminal strips is provided with 4 pairs of sensor loops, and the last 2 terminals are directly connected in up and down.

[0043] The terminal strip of the voltage signal is short-circuited with the column of terminals of the incoming line and the outgoing line. The terminal of the current signal is short-circuited in up and down in the first column, and a precision resistor is added between the incoming line and the outgoing line in the second column.

[0044] (3) As preferred, the precision resistor adopts a parallel connection of two precision resistors, so as to avoid affecting the signal transmission of the original hydrogen production equipment when a single resistor is damaged.

[0045] The model of the precision resistor is not fixed, for example, a parallel connection of 2 ohms can be selected, so that the resistance in series in the sensor loop is 1 ohm.

[0046] (4) As preferred, the operational amplifier circuit part adopts a differential voltage conversion circuit with high input impedance.

[0047] (5) A single-chip microcomputer is used to complete the sampling of 16 channels of analog signals. The sampling results are stored in an SD card, and the storage frequency can be modified according to requirements.

[0048] (6) A screen interface is provided, and the collected signals are sent to the screen interface through serial communication, which is convenient for on-site reading. The interface is four-wire, including 2 power supply lines and 2 communication lines. After the screen is plugged in, the sampling signal results of 16 channels can be displayed.

[0049] The screen display interface also has the function of device parameter configuration, such as modifying the data storage frequency of the device.

[0050] The embodiment can be installed in an on-site explosion-proof junction box, and can record the running data of each sensor in real time under the premise that the original control system sensor signal transmission is not affected, and the data is stored in an SD card. A local display screen interface is provided, and the data parameters connected to the device can be directly observed, ensuring the safety of the equipment running data and facilitating the maintenance of the operation and maintenance personnel.

[0051] At the same time, the embodiment can be installed in the process equipment when it leaves the factory, and the data can be saved in the explosion-proof junction box. When the equipment is maintained, the old card can be directly pulled out and replaced with a new card to realize data recovery.

[0052] The actual application diagram of the device is as shown in the accompanying Figure 4As shown, the front two terminal connection screens are connected only when overhauling, and are not connected in formal application, and the rear four 10P pluggable terminal blocks are connected to the sensors of the hydrogen production frame through the incoming line, and the lower outgoing line is a multi-core cable, which is directly connected to the remote control cabinet.

[0053] The main process of the retrofitting method of the embodiment is as follows:

[0054] S1, prepare a set of water electrolysis hydrogen production equipment that can normally operate;

[0055] S2, remove the original wiring terminal block of the hydrogen production equipment explosion-proof junction box, and install the device;

[0056] S3, connect the 24V power supply circuit, connect the sensor signal lines to the upper incoming line terminal of the device, and connect the signal lines of the control cabinet to the lower outgoing line terminal of the device to form the signal loop of each sensor;

[0057] S4, insert the SD card and supply power to the 24V power supply of the device and all sensors;

[0058] S5, use the on-site display screen to connect the screen interface, so as to observe whether all sensor signals are working normally, and to check whether the connection lines of each sensor are correct;

[0059] S6, close the cover of the explosion-proof junction box, and the hydrogen production equipment is normally started and operated, and the device can automatically operate and record data.

[0060] S7, after a certain period of time, pull out the SD card, directly replace it with a new SD card, and the old card can be read with a computer to read the recorded data.

[0061] The above technical solution is only an exemplary embodiment of the present application, and for those skilled in the art, on the basis of the application method and principle disclosed in the present application, various types of improvements or modifications can be easily made, and are not limited to the methods described in the above specific embodiments of the present application, therefore the above described method is only preferred, and does not have a limiting meaning.

Claims

1. A water electrolysis hydrogen production equipment on-site signal acquisition and storage device, characterized in that, The utility model relates to a kind of hydrogen production frame signal acquisition device, including: Inlet terminal row, for connecting the voltage or current sensor cable of hydrogen production frame; Outgoing terminal row, for connecting the signal cable of remote control system; Voltage signal acquisition module, for converting sensor analog signal into digital quantity;Including: operational amplifier circuit and data acquisition part; Data storage device, for recording the sensor digital signal collected; Wherein: When voltage signal is collected, one of inlet terminal and one of outgoing terminal are short-circuited, and are connected into the operational amplifier circuit respectively, and operational amplifier circuit is output to the data acquisition part, and after analog quantity is converted into digital quantity, it is recorded in data storage device; When current signal is collected, one of inlet terminal and one of outgoing terminal are short-circuited, and another inlet terminal and one outgoing terminal are provided with resistance;Voltage drop signal at both ends of the resistance is connected into the operational amplifier circuit, and operational amplifier circuit is output to the data acquisition part, and after analog quantity is converted into digital quantity, it is recorded in data storage device.

2. The apparatus of claim 1, wherein, The terminal row is set as upper inlet terminal row and lower outgoing terminal row, each terminal row includes 2 layers of terminals, and the wiring hole of 2 layers of terminals is short-circuited, one of which is used for wiring, and the other is used for later measurement.

3. The apparatus of claim 1, wherein, The operational amplifier circuit uses differential voltage conversion circuit with high input impedance.

4. The apparatus of claim 1, wherein, The resistance uses the form of two precise resistances in parallel, to avoid the influence on original hydrogen production equipment signal transmission after single resistance is damaged.

5. The apparatus of claim 1, wherein, The data acquisition part uses single-chip microcomputer, and can complete 16 channels of analog signal sampling simultaneously.

6. The apparatus of claim 1, wherein, The data storage device uses SD card.

7. The apparatus of any one of claims 1-6, wherein, Screen interface is provided in the inlet terminal row, for connecting screen; Screen interface is provided in the inlet terminal row, and the screen interface sends acquisition signal to screen through serial communication, and the other end of interface is connected with data acquisition part.

8. The apparatus of claim 7, wherein, The screen interface is used for the configuration of the acquisition and storage related parameters of device simultaneously.

9. The apparatus of any one of claims 1-6, wherein, 24V power port is provided in outgoing terminal row, for power supply for circuit board.

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