Contactor multipath auxiliary contact current monitoring device

Abstract

The utility model discloses a contactor multipath auxiliary contact current monitoring device comprising a current sensor, the front end of the current sensor is connected with a DC power supply, the rear end of the current sensor is connected with a data acquisition module, the current sensor is also connected with a touch screen interface, and the touch screen interface is connected with a switching value output module. According to the utility model, the current monitoring device can realize the effects of real-time monitoring, test information storage, fault alarm and the like of the multi-path auxiliary contact in the life durability cycle test, monitors the load current state of the multi-path auxiliary contact in real time, tracks the working states of products and equipment, improves the reliability and accuracy of the test, and improves the reliability and reliability of the test. External interfaces of the equipment are simple, peripheral circuit connection is facilitated through the plug type design, and the equipment is small in size, compact in structure, easy to operate and convenient to move and use.

Description

Technical Field

[0001] This patent relates to a contactor multi-channel auxiliary contact current monitoring device. Background Art

[0002] The auxiliary contacts of the contactor have the characteristics of many circuits and small rated current. A single product can reach up to 16 circuits, generally not exceeding 5A. When the contactor is undergoing a life durability cycle test, it is necessary to apply the rated load current to all contacts including the auxiliary contacts according to the set on and off cycles to assess whether the product meets the design requirements. The conventional test monitoring method is to determine the on and off status of the contacts through indicator lights and ammeters. This method is relatively simple, but it has high requirements for test personnel. It is necessary to observe the indicator light conversion in real time, and the historical conversion situation cannot be recorded in real time.

[0003] The Chinese patent with the publication number CN111796182A discloses an AC contactor electrical life test method and device based on a large-capacity electronic test product, including a first circuit breaker, a second circuit breaker, a 1 / 6Ue transformer, a first electronic test product, a second electronic test product, a primary contactor test product group, a secondary contactor test product group, a primary adjustable impedance load, a secondary adjustable impedance load, a high-speed data acquisition card, and a digital signal input circuit. The industrial control computer drives the test products in the primary contactor test product group and the secondary contactor test product group through the digital signal output circuit, and opens or closes according to the test action mode required by AC3 or AC4. However, the method of using an industrial control computer plus an acquisition board to perform test control is costly, and in actual use, the line connection and software operation are often complicated, the option settings are numerous, and the historical situation cannot be recorded in real time. Therefore, a contactor multi-channel auxiliary contact current monitoring device with a small size, compact structure, simple operation, and easy to move is needed.

[0004] The Chinese patent with publication number CN209417239U discloses a low-voltage contactor life test control system. The auxiliary normally open nodes of the low-voltage contactor are respectively connected to the counter and the electrical control cabinet, and the coil is connected to the electrical control cabinet. The voltage and current of the test main circuit are respectively introduced into the attenuation impedance and the signal enters the optical oscilloscope. The trigger signal end of the oscilloscope is connected to the electrical control cabinet, and the electrical control cabinet consists of a PLC and a contactor. Using an oscilloscope recorder for current monitoring can save historical waveforms in real time. However, when there are many auxiliary contacts, an equal number of small-range current clamps are required, the equipment investment and cost are high, and the test equipment connection is more cumbersome. Therefore, a device with a simple external interface and a plug-in design is needed to facilitate the connection of peripheral circuits. Multi-channel auxiliary contact current monitoring device for contactors. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a contactor multi-channel auxiliary contact current monitoring device.

[0006] The utility model is realized through the following technical solutions.

[0007] The utility model provides a contactor multi-channel auxiliary contact current monitoring device, comprising a current sensor, wherein the front end of the current sensor is connected to a DC power supply, the back end is connected to a data acquisition module, the current sensor is also connected to a touch screen interface, and the touch screen interface is connected to a switch output module.

[0008] Preferably, the current sensor is a 16-channel current sensor.

[0009] Preferably, the current sensor collects current information and transmits the transmission signal to the data acquisition module.

[0010] Preferably, the data acquisition module is connected and communicated with the touch screen.

[0011] Preferably, the switch output module is driven and sends a signal when the contact conversion state is abnormal.

[0012] Preferably, the monitoring device realizes input and output interfaces through a 16-way aviation plug, and is connected to the tested product, a DC power supply, and a load.

[0013] The beneficial effects of the utility model are that the current monitoring device can realize real-time monitoring of multiple auxiliary contacts in life durability cycle tests, test information storage and fault alarm, and the external interface of the equipment is simple, the plug-type design is convenient for peripheral circuit connection, the equipment is small in size, compact in structure, simple in operation, and easy to move and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall device of the utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and specific examples:

[0016] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0017] See also Figure 1 shown.

[0018] The utility model discloses a contactor multi-channel auxiliary contact current monitoring device, comprising a current sensor, wherein the front end of the current sensor is connected to a DC power supply, and the back end is connected to a data acquisition module. The current sensor is also connected to a touch screen interface, and the touch screen interface is connected to a switch output module. The whole set of monitoring devices can be integrated in a small cabinet, and 16 current input terminals and 16 current output terminals are introduced in the form of aviation plugs. After the monitoring device is powered on, it can automatically enter a real-time current acquisition mode without any operation, so as to provide test data acquisition and monitoring support for the contactor life durability cycle test. By checking the corresponding monitoring channel, the on-off state monitoring of the corresponding channel can be realized.

[0019] The current sensor adopts 16-channel small-range high-precision current sensors. The 16-channel current sensors are the core acquisition components of the device. They can monitor the current information of 16 auxiliary contacts at the same time, convert the current value of each channel into a standard industrial control signal and transmit it to the analog data acquisition module for group processing, thereby realizing real-time monitoring and data recording.

[0020] The current sensor can collect the current information of the corresponding channel in real time without contact by means of induction, and transmit the transmission signal to the data acquisition module.

[0021] The data acquisition module is connected and communicated with the touch screen.

[0022] The data acquisition module has 16 acquisition channels in total, and exchanges data with the touch screen interface through the MODBUS 485 communication protocol to transmit the current acquisition information of each channel in real time.

[0023] The touch screen realizes the interactive function through the human-machine interface, is the control core of the monitoring device, communicates with the input and output modules in real time, records and saves the current information of each channel in real time, saves it in the storage area, and displays the current information on the interface in a graphical way.

[0024] The switch output module is driven and sends a signal when the contact conversion state is abnormal. The switch output module can perform on-off logic recognition on the current information of the specified channel through software settings. When the contact is abnormal, the switch output module can be driven to send out an alarm message to prompt the test personnel to intervene in time.

[0025] The monitoring device realizes input and output interfaces through a 16-way aviation plug and is connected to the tested product, a DC power supply, and a load.

[0026] DC power supply, load and test product: The monitoring device realizes input and output interface through 16-way aviation plug, and is connected to the test product, DC power supply and load. It can monitor the load on-off status of up to 16 auxiliary contacts to form a complete closed test system.

[0027] The monitoring device uses a portable small mobile cabinet as the equipment carrier, which is convenient for mobile use. The obvious part on the front is the touch screen interface, which is convenient for human-computer interaction. The rear of the device uses an aviation plug as the input and output of 16 current channels to realize the external interface. The external power supply of the device is 220VAC, and the internal DC switching power supply is used to power various electronic devices.

[0028] During use, the corresponding input and output interfaces are connected to the load circuit, and the number of channels to be monitored and the limit thresholds for connection and disconnection are set through the touch screen interface to realize current monitoring of the corresponding channels.

Claims

1. A contactor multi-channel auxiliary contact current monitoring device, characterized in that: It includes a current sensor, the front end of which is connected to a DC power supply, the back end of which is connected to a data acquisition module, the current sensor is also connected to a touch screen interface, and the touch screen interface is connected to a switch output module; the current sensor adopts a 16-way current sensor; the monitoring device realizes input and output interfaces through a 16-way aviation plug, and is connected to the tested product, the DC power supply, and the load.

2. A contactor multi-channel auxiliary contact current monitoring device according to claim 1, characterized in that: The current sensor collects current information and transmits the transmission signal to the data acquisition module.

3. A contactor multi-channel auxiliary contact current monitoring device according to claim 1, characterized in that: The data acquisition module is connected and communicated with the touch screen.

4. A contactor multi-channel auxiliary contact current monitoring device according to claim 1, characterized in that: The switch output module is driven and sends a signal when the contact conversion state is abnormal.

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