Equipment information acquisition method and system

Abstract

The invention provides an equipment information acquisition method and system, which can acquire digital information and analog information of equipment, set a time interval T1, start to accumulate running time T2 when a switch displacement point is closed, start to calculate pause time when the switch displacement point is released until the switch displacement point is closed again, and record the pause time as T3 if T3lt; and when T3 is greater than or equal to T1, T3 is cleared, the operation time T2 is not accumulated, when T3 is greater than or equal to T1, T3 is cleared, one-time operation time T of the equipment is considered to be equal to T2, T2 is cleared at the same time, and the statistical cycle of the next operation time is performed again. According to the method, the operation time information of the equipment can be reasonably calculated, the problem that equipment such as a bending machine which needs to pause a large amount of work is not counted in the working time during pause is avoided, and regular maintenance of all the equipment is facilitated.

Description

Technical Field

[0001] The present invention relates to the fields of network communication and electrical signal acquisition, and particularly relates to a method and system for acquiring device information. Background Art

[0002] Nowadays, large chemical enterprises need to uniformly monitor a variety of devices. When managing, it is often necessary to count the running time of the devices, and determine whether the devices need maintenance through the accumulation of the running time. However, currently, device manufacturers are different and the types are diverse. Some devices with a relatively high degree of automation are equipped with corresponding communication functions, while the basic configurations of some traditional devices are simplified and have no interfaces. For those with interfaces, there may also be inconsistent interfaces and protocols, making it impossible to manage them uniformly. On the other hand, the working time of the devices is often counted based on the total time of a single work process. During this period, it is very likely that the machine is not running all the time, and there are short gaps during material feeding and discharging. During these gaps, the machine will be manually paused, but in fact, the operation is not completed. Currently, full-automatic detection generally measures the working time of the device through the working current. In this case, the temporary pause of the machine will be ignored by the acquisition device as if it has stopped working, resulting in the statistical running time being less than the actual working time, and it is easy to miss the best maintenance time of the device. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for acquiring device information, which can not only solve the problem of unified acquisition of different device information, but also avoid incomplete acquisition information caused by short-term pauses of the device.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: A method for acquiring device information includes the steps of: Collecting digital information of the device's power-on / off signal, alarm signal, and operation signal; Collecting analog information of the device's operating current; Calculating the running time information of the device through the digital information and the analog information; Statistically storing the above digital information, analog information, and running time information; The calculation method of the running time information is as follows: In a single work process, setting a time interval T1; Collecting the power-on / off data of the device's digital input points. When the switching point closes, start accumulating the running time, denoted as T2; When the switching point is released, start calculating the pause time until the switching point closes again. This pause time is denoted as T3; If T3 < T1, clear T3, and the running time T2 does not stop accumulating; When T3≥T1, T3 is reset to zero, and it is considered that the equipment's running time T=T2. At the same time, T2 is reset to zero, and the next running time statistics cycle is restarted; When the switch changing position is closed, the device is in operation, and when the switch changing position is released, the device is in offline state.

[0005] Preferably, whether the device is in operation is determined based on the operation current. If the node current is lower than a set node current, the device is considered to be in an offline state; if the node current is higher than or equal to the set node current, the device is considered to be in operation.

[0006] Preferably, the current signal collection range is H1, the current transformer range is h1, the node current is set to H, h2 is the current transformer output value, the actual collection value H2=h2*H1 / h1, when H2≥H, the device is considered to be in operation, otherwise the device is considered to be offline.

[0007] The present invention also provides a device information collection system, comprising a device terminal, a communication layer and a data management layer, wherein the communication layer comprises a data collection terminal connected to the device terminal and a communication management machine connected to the data collection terminal, and the data management layer comprises a computer terminal, a display screen and a mobile client; The data acquisition terminal includes an intermediate relay, a safety isolator, a current transformer, a digital quantity module, an analog quantity module, a programmable controller and a TCP / IP interface; The intermediate relay is connected to the device terminal signal and provides the digital quantity module with power on / off signal, alarm signal and operation signal; the current transformer collects the operating current of the device terminal one by one and provides the current analog quantity for the analog quantity module; the programmable controller is connected to the digital quantity module and the analog quantity module for processing and analyzing data, and is connected to the data management layer through the TCP / IP interface.

[0008] Preferably, the data acquisition terminal is a PLC acquisition terminal.

[0009] Preferably, the measuring range of the current transformer is 0-100A, and the current signal conversion range is 4-20mA.

[0010] The advantages of the present invention are: The present invention provides an online equipment information collection system and method, including a switch quantity collection module for collecting equipment startup and shutdown, alarms, operating workload, etc.; an analog quantity collection module for collecting equipment operating current and defining equipment operating status; a data operation module for logical operations of external interface input information; and a standard communication interface for various information exchanges between equipment background systems and data centers. The equipment is started up by collecting the startup switch quantity point synchronized with the equipment. When this point changes position, time accumulation is realized immediately; the equipment is shut down by collecting the shutdown switch quantity point synchronized with the equipment. When this point changes position, time accumulation is stopped immediately. The operation time collection is statistically analyzed by considering both the change of position and the pause time. This calculation method is more reasonable and can avoid the problem that equipment such as bending machines that require a lot of pauses are not counted in the working time during the pause, which is conducive to the regular maintenance of all equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the connection structure of the system of the present invention; Figure 2 It is a schematic diagram of the connection structure of the data acquisition terminal of the present invention. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0013] Example 1 This embodiment discloses a device information collection system. Figure 1 , including a device terminal, a communication layer and a data management layer. The communication layer includes a data acquisition terminal connected to the device terminal and a communication management machine connected to the PLC data acquisition terminal. The data management layer includes a computer terminal, a display screen and a mobile client.

[0014] The PLC data acquisition terminal includes an intermediate relay, a safety isolator, a current transformer, a digital module, an analog module, a programmable controller, and a TCP / IP interface. The intermediate relay is connected to the device terminal signal and provides the digital module with a power on / off signal, an alarm signal, and an operation signal; the current transformer collects the operating current of the device terminal one by one and provides the analog module with current analog quantity; the programmable controller is connected to the digital module and the analog module to process and analyze the data, and is connected to the data management layer through the TCP / IP interface.

[0015] The switch quantity acquisition module is used to collect equipment start-up and shutdown, alarms, operating workload, etc.; the analog quantity acquisition module is used to collect equipment operating current and define the equipment operating status; the data operation module is used for logical operations of external interface input information; the standard communication interface is used for various information exchanges between the equipment background system and the data center.

[0016] Example 2 This embodiment provides a method based on the system of Embodiment 1. The operating time of the device can be calculated using the on / off digital signal and the analog signal of the operating current collected by the system of Embodiment 1. The specific implementation method is as follows: In a single workflow, set a time interval T1; Collect the on / off data of the device's digital input points. When the switching point closes, start accumulating the operating time, denoted as T2; When the switching point is released, start calculating the pause time until the switching point closes again. This pause time is denoted as T3; If T3 < T1, clear T3, and the operating time T2 does not stop accumulating; When T3 ≥ T1, clear T3, and consider the device's one-time operating time T = T2. At the same time, clear T2 and start a new statistical cycle for the next operating time; The device is in the operating state when the switching point is closed, and the device is in the offline state when the switching point is released. Whether the device is in the operating state is determined based on the operating current. If the current is lower than the set node current, the device is considered to be in the offline state; if it is higher than or equal to the set node current, the device is considered to be in the operating state.

[0017] For example, in this embodiment, the current signal acquisition range is 4 - 20 mA, the current transformer range is 0 - 100 A, the set node current is H, h is the output value of the current transformer, and the actual collected value H1 = h * 16 (mA) / 100 (A). When H1 ≥ H, the device is considered to be in the operating state; otherwise, the device is considered to be in the offline state.

[0018] Since the traditional method determines whether the device is working based on the operating current, if the device pauses briefly, the timing will stop, but the device is actually still within a working cycle. For example, during the working process of a bending machine, technicians usually need to pause the machine to change the placement position of the bending device or replace the bending device. This period is very short, but the machine will pause operation. If this time is not counted as working time, it is unreasonable. However, for other devices, such as a spray painting machine, the one-time operating time is very long and there are few pause times. If both use the operating current to calculate the working time, the error for calculating the time of the bending machine will be very large. Using the method of this embodiment can avoid this situation. For example, set the time interval T1 to 5 minutes. As long as the pause time of the device is less than 5 minutes, the working time will continue to accumulate without stopping until the pause time is greater than or equal to 5 minutes. At this time, we consider the machine to stop working, and it is more reasonable to stop accumulating the working time at this point.

[0019] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device information collection method, characterized in that: Including the steps: (1) Collect the digital information of the device's power-on / off signal, alarm signal, and operation signal; (2) Collect the analog information of the device's operating current; (3) Calculate the device's running time information based on the digital information and analog information; (4) Statistically analyze and store the above digital information, analog information, and running time information; The calculation method of the running time information is as follows: (1.1) In a single workflow, set the time interval T1; (1.2) Collect the power-on / off data of the device's digital input points. When the digital input point closes, start accumulating the running time, denoted as T2; (1.3) When the digital input point releases, start calculating the pause time until the digital input point closes again. This pause time is denoted as T3; (1.4) If T3 < T1, clear T3, and the running time T2 continues to accumulate; (1.5) When T3 ≥ T1, clear T3, and consider the device's single running time T = T2. At the same time, clear T2 and start a new statistical cycle for the next running time; The closure of the digital input point indicates that the device is in the running state, and the release of the digital input point indicates that the device is in the offline state.

2. The device information collection method according to claim 1, characterized in that: Whether the device is in the running state is determined based on the operating current. If the current is lower than the set node current, the device is considered to be in the offline state; if it is higher than or equal to the set node current, the device is considered to be in the running state.

3. The device information collection method according to claim 1, characterized in that: The current signal acquisition range is H1, the current transformer range is h1, the set node current is H, h2 is the output value of the current transformer, and the actual acquisition value H2 = h2 * H1 / h1. When H2 ≥ H, the device is considered to be in the running state; otherwise, the device is considered to be in the offline state.

4. A device information collection system applied to claim 1, characterized in that: Including a device terminal, a communication layer, and a data management layer. The communication layer includes a data acquisition terminal connected to the device terminal and a communication management machine connected to the data acquisition terminal. The data management layer includes a computer terminal, a display screen, and a mobile client; The data acquisition terminal includes an intermediate relay, a safety isolator, a current transformer, a digital quantity module, an analog quantity module, a programmable logic controller, and a TCP / IP interface; The intermediate relay is signal-connected to the device terminal and provides the power-on / off signal for the digital quantity module; the current transformer collects the operating current of the device terminal one by one and provides the current analog quantity for the analog quantity module; the programmable logic controller is connected to the digital quantity module and the analog quantity module, used to process and analyze data, and is connected to the data management layer through the TCP / IP interface.

5. The device information collection system according to claim 4, characterized in that: The data acquisition terminal is a PLC acquisition terminal.

6. The device information collection method according to claim 1, characterized in that: The range of the current transformer is 0 - 100A, and the current signal conversion range is 4 - 20mA.

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