Meter multifunctional multiplexing system and method based on single line

Abstract

The invention relates to the technical field of measuring instruments, in particular to a multifunctional meter multiplexing system based on a single line, which comprises a power supply module, a single physical link, an electric energy analysis module, a switching module, a control module and an energy storage module, and is characterized in that the control module comprises a timing unit, and the switching module comprises a contactor. In addition, the meter multifunctional multiplexing method based on the single line comprises the steps that S1, a timing unit in the control module carries out timing according to the preset time, and a control instruction is output after the time condition is met; s2, the control module outputs a control instruction to an output node, and a contactor is controlled to perform actuation or release according to the content of the instruction; s3, when the contactor is closed, the power supply line is conducted, and an external power supply is provided for the meter energy storage module; and S4, when the contactor is released, the communication loop is conducted, and the central control room communicates with the meter through the communication loop to obtain data of the meter. The power supply line and the signal line are combined through the technical means, and the construction cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of measuring instruments, and in particular to a multifunctional multiplexing system and method of a meter based on a single line. Background Art

[0002] With the continuous improvement of the automation level of enterprise production sites, more and more data needs to be collected and centrally communicated to the central control room through on-site measuring instruments (meters). Take the thermometer and hygrometer used in the on-site power distribution room and instrument cabinet room as an example: the meter itself needs external power supply, and a cable with specifications of 2*1.5 or above is required as the power supply line for power supply; at the same time, the meter also needs to communicate the temperature and humidity data collected by itself to the upper host via the MODBUS bus, and a 2*1.5 shielded cable is required as the signal line for communication. The power supply line and the signal line are set separately, which increases the cost of cable materials and prolongs the construction time. Since the temperature and humidity data have relatively low data real-time performance and power supply reliability, it can be considered to merge the power supply line and the signal line through technical means to save construction costs. Summary of the invention

[0003] The purpose of the present invention is to propose a meter multi-function multiplexing system and method based on a single line to solve the problems mentioned in the background technology.

[0004] To achieve the above-mentioned purpose, the basic solution provided by the present invention is: a multifunctional multiplexing system of a meter based on a single line, comprising: a power supply module for providing power supply; a single physical link, comprising a power supply line and a data transmission line, the power supply line is used to transmit the electric energy of the power supply module to the energy storage module, and the data transmission line is used to transmit data between the meter and the central control room; a control module, comprising a timing unit, the timing unit is used to set the switching time of the power supply line and the data transmission line; a switching module, comprising a contactor, switching the conduction state of the power supply line and the data transmission line by controlling the attraction and release of the contactor; an energy storage module, arranged on the meter, for supplying power when the meter is working.

[0005] Beneficial effects of the basic solution: This solution uses a single physical link to realize power supply and data communication collection for remote meters, which can significantly reduce the cable material cost and construction cost compared with the existing technical solution. At the same time, the energy storage module is used to power the meter, which reduces the meter power supply voltage to within the safe voltage range compared with direct power supply. The control module includes a timing unit, which can automatically switch the power supply line and the data collection line according to the corresponding time period set according to the meter collection requirements.

[0006] As a preferred solution, the power supply module includes a main power supply unit and a backup power supply unit, the main power supply unit is used to provide main power to the energy storage module, and the backup power supply unit is used to quickly take over when the main power supply module fails;

[0007] The switching module is also used to switch to the backup power supply unit for power supply when the main power supply unit fails.

[0008] By setting up a backup power supply unit, the continuity and stability of the system operation can be guaranteed, and the data collection work of the meter can be carried out smoothly.

[0009] As a preferred solution, it also includes an electric energy analysis module for monitoring and evaluating the performance and status of the power supply module, and analyzing the operating status of the power supply module and whether a fault occurs.

[0010] The power analysis module monitors whether the power supply module fails, so that the switching module can switch between the main power supply unit and the backup power supply unit in time to provide protection for the system. This precise and real-time monitoring can accurately predict the power supply module, thereby ensuring efficient and timely switching between the main power supply unit and the backup power supply unit in the shortest time to ensure the continuity and stability of system operation.

[0011] As a preferred solution, the power analysis module evaluates the performance and status of the power supply module by collecting and analyzing key power parameters of the power supply module, and the key power parameters include voltage, current, power, and frequency.

[0012] Analyzing the power supply module through operation data can make the evaluation results of the power supply module more accurate and reliable, thus effectively guaranteeing the stability and efficiency of our system operation. In addition, through this data analysis, we can also accurately and objectively evaluate the operating status of the power supply module, help to timely discover potential problems and hidden dangers, and take necessary measures in advance to avoid the expansion of problems and ensure the normal and stable operation of the system.

[0013] As a preferred solution, the energy storage module includes a charging control unit for controlling and managing the charging process of the energy storage module. The charging control unit also has a built-in adaptive charging algorithm that can dynamically adjust the charging rate during the charging process.

[0014] The charging control unit can manage the charging process, ensure that the amount of electricity stored in the energy storage module is sufficient for the normal operation of the meter, optimize the charging measurement, and extend the service life of the energy storage module.

[0015] By introducing a charging control unit, this module can achieve refined management of the charging process. In this way, it can ensure that there is always enough and appropriate electrical energy stored in the energy storage module to meet the usage requirements of the meter equipment, thereby ensuring the normal and stable operation of the entire system. In addition, through this measure, charging measurement has been optimized, which can improve charging efficiency and save energy on the one hand; on the other hand, it also helps to reduce battery heating and extend the service life of the energy storage module.

[0016] As a preferred solution, the electric energy analysis module is also used to record the historical key electric energy parameters of the power supply module, analyze and compare the performance of the main power supply unit and the backup power supply unit, so as to evaluate the performance of each power supply unit, and the switching module adjusts the power supply unit with better performance to the main power supply unit.

[0017] The power analysis module analyzes the performance of each power supply unit through historical power key parameters. On the one hand, it can use the power supply unit with better performance as the main power supply unit to improve the operating efficiency and stability of the power supply system. On the other hand, when performance abnormalities occur, the relevant hardware equipment can be replaced in time to ensure the stable operation and safety and reliability of the power supply system.

[0018] As a preferred solution, the power analysis module is also used to collect key energy storage parameters of the energy storage module, including the maximum power Q currently available for the energy storage module. aged , the maximum power Q when the energy storage module is not in use new , the current measured capacity C of the energy storage module aged , nominal capacity of energy storage module C new , the theoretical internal resistance REOL at the end of the energy storage module's life, the internal resistance Q new , the current internal resistance R of the energy storage module;

[0019] The power analysis module will analyze the health status of the energy storage module based on the key energy storage parameters. The formula is as follows:

[0020]

[0021] Among them, W Q is the maximum power weight parameter, W C is the capacity weight parameter, W R is the capacity weight parameter.

[0022] By collecting multiple key energy storage parameters through the electric energy module, the health status of the energy storage module is evaluated from multiple angles, and the corresponding weight parameters are set according to the actual usage scenarios and actual equipment conditions to ensure the accuracy of the evaluation results and their close fit with the actual usage scenarios. This makes the evaluation results more scientific and reasonable, and more truly reflects the performance of the energy storage module under various environmental conditions.

[0023] As a preferred solution, the energy storage module includes a charging control unit for adjusting the target energy storage capacity according to the health status of the energy storage module and the meter power consumption.

[0024] Since the health status of the energy storage module affects the actual power supply capacity of the energy storage module, the target energy storage capacity is adjusted in combination with the actual power consumption of the meter. This can ensure that the energy storage module is effective even after long-term use, while avoiding excessive energy storage that affects the service life of the energy storage module.

[0025] As a preferred solution, the energy storage module also includes an energy storage protection unit, which collects the number of cycles of the energy storage module, and combines the health status of the energy storage module to obtain a curve of energy storage module health status-cycle number, and compares it with a standard curve of energy storage module health status-cycle number. The existing problems are judged by the relative position of the energy storage module health status-cycle number curve and the standard curve of energy storage module health status-cycle number.

[0026] Based on the actual power consumption data collected in real time, this solution deeply analyzes and calculates the health status of the energy storage module, so that the judgment of the health status can better reflect the situation of the equipment itself, and thus accurately judge the fault direction of the energy storage module according to the corresponding position of the standard curve. In this way, the solution significantly improves the efficiency of maintenance work, making the maintenance and repair of energy storage modules more efficient and accurate.

[0027] A multifunctional multiplexing method of a meter based on a single line, comprising:

[0028] S1: The timing unit in the control module counts according to the preset time, and outputs the control instruction when the time condition is met;

[0029] S2: The control module outputs control instructions to the output node, and the control contactor is attracted or released according to the content of the instruction;

[0030] S3: When the contactor is closed, the power supply line is turned on, providing external power supply for the meter energy storage module;

[0031] S4: When the contactor is released, the communication circuit is turned on, and the central control room communicates with the meter through the communication circuit to obtain the meter data. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a logic diagram of a multi-function multiplexing method of a meter based on a single line. DETAILED DESCRIPTION

[0033] The technical solution of this application is further described in detail below through specific implementation methods:

[0034] Embodiment 1

[0035] A multifunctional multiplexing system of meters based on a single line comprises: a power supply module, a single physical link, an electric energy analysis module, a switching module, a control module and an energy storage module.

[0036] The power supply module includes a main power supply unit and a backup power supply unit, which are used to provide reliable power supply to the energy storage module through a single physical link. The main power supply unit is responsible for providing the main power to the energy storage module. As a supplement to the main power supply unit, the backup power supply unit is used to quickly take over when the main power supply module fails to ensure the continuity and reliability of power supply. The design of the backup power supply unit is consistent with the setting of the main power supply unit, which can achieve seamless switching and ensure that power supply is restored in the shortest time.

[0037] A single physical link includes a power supply line and a data transmission line, which are used to connect the meter to the central control room. The voltages of the two functional lines are close, and there is no risk of overvoltage failure. The power supply line is mainly responsible for transmitting the power from the power supply module to the energy storage module to ensure the normal operation of the equipment. The data transmission line is responsible for transmitting data between two communication nodes. The performance of the data transmission line directly affects the transmission speed, signal quality and transmission distance of the communication system. In order to improve the performance of the data transmission line, a variety of technical means can be used, such as signal modulation, error correction coding, channel equalization, etc.

[0038] The power analysis module is used to monitor and evaluate the performance and status of the power supply module and analyze whether the power supply module has a fault. By analyzing the power signal generated by the power supply module, the power analysis module can quickly detect faults to ensure the stable operation of the system. The power analysis module can monitor the working status of the power supply module in real time, including key power parameters such as voltage, current, power, and frequency, to ensure the normal operation of the system. By analyzing the key power parameters, the power analysis module can quickly detect abnormal signals such as voltage fluctuations, current anomalies, and frequency deviations.

[0039] The switching module is used to switch the main power supply unit or the backup power supply unit for power supply. When the main power supply unit fails, it automatically switches to the backup power supply unit to ensure that the system can be powered normally.

[0040] The switching module is also used to switch the conduction state of the power supply line and the data transmission line in a single physical link. In this embodiment, a contactor is used to achieve switching, and the conduction state of the power supply line and the data transmission line is switched by controlling the contactor's attraction and release. When the contactor is attracted, the power supply line is turned on to provide external power supply for the meter energy storage module; when the contactor is released, the communication circuit is turned on, and the central control room communicates with the meter through the communication circuit to obtain the meter data.

[0041] The control module includes a timing unit and an output unit. The timing unit is used to set the switching time of the power supply line and the data transmission line to achieve time-division multiplexing. During the switching process, the timing unit will accurately control the switching time according to the preset time parameters, and the output unit is used to output control instructions after the time conditions are met.

[0042] The energy storage module is arranged on the meter and is used to supply power when the meter is working. In this embodiment, a lithium battery is used as the energy storage module, the charging voltage is 4.2V, and the data transmission line adopts the RS485 communication interface, and the electrical characteristics are +2V to +6V.

[0043] The energy storage module includes a charging control unit, which is used to control and manage the charging process of the energy storage module. When the battery power is too low, the charging control unit will automatically turn on the charging mode to ensure that the device can maintain normal operation. When the battery power reaches a certain level, the charging control unit will automatically turn off the charging mode to avoid overcharging and battery aging. The charging control unit also has a built-in adaptive charging algorithm that can dynamically adjust the charging rate during the charging process to extend the battery life.

[0044] like Figure 1 A multi-function multiplexing method of a meter based on a single line is shown, comprising:

[0045] S1: The timing unit in the control module counts according to the preset time, and outputs the control instruction through the output unit when the time condition is met.

[0046] S2: The control module outputs control instructions to the output node, and the control contactor is attracted or released according to the content of the instruction.

[0047] S3: When the contactor is closed, the power supply line is turned on, providing external power supply for the meter energy storage module. The charging control unit decides whether the battery needs to be charged according to the actual situation: the charging control unit is performing the charging task.

[0048] S4: When the contactor is released, the communication circuit is turned on, and the central control room communicates with the meter through the communication circuit to obtain the meter data.

[0049] Embodiment 2

[0050] The power analysis module is also used to record the historical key power parameters of the power supply module. Through the historical key power parameters, the performance of the main power supply unit and the backup power supply unit is analyzed and compared. The power analysis module can find the differences between the two in terms of power consumption, operating status, failure rate, etc., so as to evaluate the performance of each power supply unit.

[0051] The switching module adjusts the power supply unit with better performance to the main power supply unit to improve the operating efficiency and stability of the power supply system. In addition, the power analysis module can also monitor and analyze the performance of the main power supply unit in real time. When an irreversible fault occurs, the power supply module can be inspected and maintained to ensure the safe and stable operation of the power supply system.

[0052] Embodiment 3

[0053] The power analysis module is also used to collect the key parameters of the energy storage module, including the maximum power Q currently available from the energy storage module. aged , the maximum power Q when the energy storage module is not in use new , the current measured capacity C of the energy storage module aged , nominal capacity of energy storage module C new , the theoretical internal resistance REOL at the end of the energy storage module's life, the internal resistance Q new , the current internal resistance R of the energy storage module.

[0054] The power analysis module will analyze the health status (State of Health, SOH) of the energy storage module based on the key parameters of energy storage. The formula is as follows:

[0055]

[0056] Among them, W Q is the maximum power weight parameter, W C is the capacity weight parameter, W R is the capacity weight parameter.

[0057] The charging control unit is also used to adjust the target energy storage capacity according to the health status of the energy storage module and the power consumption of the meter to ensure the normal operation of the meter and extend the battery life.

[0058] The energy storage module also includes an energy storage protection unit, which collects key information such as the number of cycles of the energy storage module, and combines the health status of the energy storage module to obtain the energy storage module health status-cycle number curve. And compare it with the standard curve of the energy storage module health status-cycle number under normal conditions. Under normal circumstances, the health status of the energy storage module should gradually decrease with the increase of the number of cycles.

[0059] If the energy storage module health status-cycle number curve is below the energy storage module health status-cycle number standard curve, that is, the energy storage module health status is also low at a low cycle number, it means that the working condition of the energy storage module may be abnormal, such as abnormal charging control, or the energy storage module installation protection measures are insufficient and affected by the environment, etc., and it is necessary to arrange maintenance work on the energy storage module in time.

[0060] If the energy storage module health status-cycle number curve is above the energy storage module health status-cycle number standard curve, that is, the energy storage module health status is higher at a high cycle number, it means that the collection parameters of the power analysis module or the energy storage protection unit are abnormal, and maintenance work can be arranged for the data collection part as a priority.

[0061] The above contents are only embodiments of the present invention. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A multifunctional multiplexing system for meters based on a single line, characterized by: include: A power supply module, used for providing power supply; A single physical link includes a power supply line and a data transmission line, wherein the power supply line is used to transmit the electric energy of the power supply module to the energy storage module, and the data transmission line is used to transmit data between the meter and the central control room; the control module includes a timing unit, and the timing unit is used to set the switching time of the power supply line and the data transmission line; The switching module includes a contactor, which switches the conduction state of the power supply line and the data transmission line by controlling the contactor to be attracted and released; The energy storage module is arranged on the meter and is used to supply power when the meter is working.

2. According to claim 1, a multifunctional multiplexing system for meters based on a single line is characterized in that: The power supply module includes a main power supply unit and a backup power supply unit, wherein the main power supply unit is used to provide main power to the energy storage module, and the backup power supply unit is used to quickly take over when the main power supply module fails; The switching module is also used to switch to the backup power supply unit for power supply when the main power supply unit fails.

3. According to claim 2, a multifunctional multiplexing system for meters based on a single line is characterized in that: It also includes an electric energy analysis module for monitoring and evaluating the performance and status of the power supply module, and analyzing the operating status of the power supply module and whether a fault occurs.

4. According to claim 1, a multifunctional multiplexing system for meters based on a single line is characterized in that: The power analysis module evaluates the performance and status of the power supply module by collecting and analyzing key power parameters of the power supply module, and the key power parameters include voltage, current, power and frequency.

5. According to claim 1, a multifunctional multiplexing system for meters based on a single line is characterized in that: The energy storage module includes a charging control unit for controlling and managing the charging process of the energy storage module. The charging control unit also has a built-in adaptive charging algorithm that can dynamically adjust the charging rate during the charging process.

6. The multifunctional multiplexing system of a meter based on a single line according to claim 1 is characterized in that: The power analysis module is also used to record the historical key power parameters of the power supply module, analyze and compare the performance of the main power supply unit and the backup power supply unit, so as to evaluate the performance of each power supply unit; the switching module adjusts the power supply unit with better performance to the main power supply unit.

7. The multifunctional multiplexing system of a meter based on a single line according to claim 1, characterized in that: The power analysis module is also used to collect key energy storage parameters of the energy storage module, including the maximum power Q currently available for the energy storage module. aged , the maximum power Q when the energy storage module is not in use new , the current measured capacity C of the energy storage module aged , nominal capacity of energy storage module C new , the theoretical internal resistance REOL at the end of the energy storage module's life, the internal resistance Q new , the current internal resistance R of the energy storage module; The power analysis module will analyze the health status of the energy storage module based on the key energy storage parameters. The formula is as follows: Among them, W Q is the maximum power weight parameter, W C is the capacity weight parameter, W R is the capacity weight parameter.

8. The multifunctional multiplexing system of a meter based on a single line according to claim 7, characterized in that: The energy storage module includes a charging control unit for adjusting a target energy storage capacity according to a health status of the energy storage module and a meter power usage situation.

9. A multifunctional multiplexing system for meters based on a single line according to claim 8, characterized in that: The energy storage module also includes an energy storage protection unit, which collects the number of cycles of the energy storage module, and combines the health status of the energy storage module to obtain a curve of energy storage module health status-cycle number, and compares it with a standard curve of energy storage module health status-cycle number. The existing problems are judged by the relative position of the energy storage module health status-cycle number curve and the standard curve of energy storage module health status-cycle number.

10. A multifunctional multiplexing method for a meter based on a single line, characterized in that: include: S1: The timing unit in the control module counts according to the preset time, and outputs the control instruction when the time condition is met; S2: The control module outputs control instructions to the output node, and the control contactor is attracted or released according to the content of the instruction; S3: When the contactor is closed, the power supply line is turned on, providing external power supply for the meter energy storage module; S4: When the contactor is released, the communication circuit is turned on, and the central control room communicates with the meter through the communication circuit to obtain the meter data.

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