A portable measurement control box with charging function

Abstract

The utility model relates to industrial automation equipment detection and maintenance technical field discloses a kind of portable measurement control box with charging, including box, be provided with in the box: control circuit system, it is installed on electrical guide rail, including as core processing unit's PLC, the PLC is made of CPU module and the AI / AO module connected with CPU module;Man-machine interactive unit, for the touch screen of communication connection with the CPU module;Power module, including switching power supply, with charging type power module, first miniature circuit breaker and second miniature circuit breaker.The utility model is designed into portable box form, can be easily carried to any corner of factory, greatly improve the flexibility and efficiency of overhaul work, cover the test scene of most sensor and actuator, get rid of the dependence on external power supply in field, realize real-time detection anywhere, especially applicable to outage overhaul or passive occasion.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation equipment testing and maintenance technology, and in particular to a portable measurement and control box with charging capability. Background Technology

[0002] During the maintenance and repair of industrial field equipment (such as transmitters, sensors, frequency converters, etc.), performance testing and fault diagnosis are often required when the equipment is powered off or offline. Currently, the following problems commonly exist: Unable to test due to power failure: Power must be cut off when the equipment is under maintenance, but after the power is cut off, there is no portable power supply for 24V equipment (such as transmitters) to provide working voltage, which makes it impossible to perform functional tests offline; Lack of verification before new equipment is put into storage: The lack of a comprehensive testing platform to verify newly purchased equipment (such as transmitters of different models and parameters) before installation may lead to the equipment being found to be non-functional or having mismatched parameters after it has been installed, increasing maintenance costs and downtime. Difficulty in on-site fault diagnosis: When equipment malfunctions in the field, it is difficult to quickly determine whether the problem lies with the signal source or the equipment itself. There is a lack of a portable source that can provide standard analog signals to quickly locate the fault.

[0003] Existing solutions typically involve setting up temporary test platforms or relying on large, immobile test equipment, which is inefficient and inconvenient. Therefore, there is an urgent need for an integrated, portable measurement and control box with energy storage capabilities to meet the requirements for rapid on-site maintenance and equipment verification. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a portable measurement control box with rechargeable power supply. This control box integrates power supply, energy storage battery, multiple signal measurement and analog output functions, and can provide a one-stop solution for the maintenance, testing and fault diagnosis of industrial field equipment without relying on an external power source.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a portable measuring and control box with charging capability, comprising a box body, wherein the box body is provided with: The control circuit system, which is mounted on an electrical rail, includes a PLC as the core processing unit, which consists of a CPU module and an AI / AO module connected to the CPU module; The human-computer interaction unit is a touchscreen that is communicatively connected to the CPU module. The power supply module includes a switching power supply, a rechargeable power supply module, a first miniature circuit breaker, and a second miniature circuit breaker. The input terminal of the switching power supply is selectively connected to an external AC power source through the first miniature circuit breaker. The power output terminal of the rechargeable power module is selectively connected to the system DC power bus via the second miniature circuit breaker. The signal conditioning module includes multiple analog signal isolators. The analog input and output channels of the AI / AO module are respectively connected to the external terminals on the enclosure through the corresponding analog signal isolators. A digital output driver module includes multiple relays. The digital output channel of the CPU module is connected to the coil of the relay, and the external load is driven by the contacts of the relay. The network communication module is a rail-mounted switch connected to the CPU module and is used to expand the communication interface.

[0006] As a further description of the above technical solution: The number of analog signal isolators is four.

[0007] As a further description of the above technical solution: The number of relays is six, forming six digital output channels.

[0008] As a further description of the above technical solution: The CPU module itself integrates no fewer than six digital input channels for receiving external switching signals.

[0009] As a further description of the above technical solution: The AI / AO module provides no fewer than four analog input channels and no fewer than two analog output channels.

[0010] As a further description of the above technical solution: The enclosure is equipped with terminal blocks corresponding to all analog input, analog output, digital input, digital output channels, and external power supply interfaces.

[0011] As a further description of the above technical solution: The power supply module is used to provide DC24V power to the control circuit system, human-machine interaction unit and external device under test.

[0012] As a further description of the above technical solution: The first miniature circuit breaker and the second miniature circuit breaker are configured to have two operating modes: When the first miniature circuit breaker is closed and the second miniature circuit breaker is open, the system DC power bus is powered by the switching power supply and simultaneously charges the rechargeable power module. When the first miniature circuit breaker is open and the second miniature circuit breaker is closed, the system DC power bus is powered by the rechargeable power module.

[0013] As a further description of the above technical solution: The rechargeable power module includes a charging management module and an energy storage battery pack. The charging management module is used to receive electrical energy and perform intelligent charging management on the energy storage battery pack; the energy storage battery pack is used to store electrical energy.

[0014] This utility model has the following beneficial effects: This utility model is designed in the form of a portable case, easily carried to any corner of the factory, greatly improving the flexibility and efficiency of maintenance work. It solves the core needs of power supply, measurement, and simulation required for equipment testing in industrial fields, covering the testing scenarios of most sensors and actuators. It eliminates dependence on external power sources, enabling true anytime, anywhere testing, and is particularly suitable for power outage maintenance or passive environments. All operations and monitoring are performed through a touchscreen, providing a user-friendly interface and intuitive data display, lowering the barrier to entry for technicians. It can be used for rapid fault location and for new equipment acceptance verification, ensuring equipment integrity from the source, reducing unplanned downtime caused by equipment problems, and ensuring stable production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the power supply module circuit of this utility model; Figure 2 This is a block diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the digital input / output principle of this utility model; Figure 4 This is a schematic diagram of the analog input / output (AI / AO) principle of this utility model; Figure 5 This is an appearance drawing of the present utility model.

[0016] Legend: 1. Enclosure; 2. CPU module; 3. AI / AO module; 4. Touch screen; 5. Switching power supply; 6. Rechargeable power supply module; 7. Analog signal isolator; 8. Relay; 9. DIN rail switch. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example like Figures 1-5 As shown, a portable measurement control box with charging capability includes a box body 1, which is made of robust engineering plastic or metal material and is equipped with a handle and an airtight lid for easy carrying.

[0019] The control circuit system is installed inside the housing 1 and is mounted on the electrical rail. It includes a PLC as the core processing unit. The PLC consists of a CPU module 2 and an AI / AO module 3 connected to the CPU module 2. The human-machine interface unit is a touchscreen 4 that communicates with the CPU module 2; the housing 1 is equipped with standard electrical rails. All electrical modules are mounted on the rails, with a compact and reasonable layout. Specifically, it includes: a switching power supply 5, a first miniature circuit breaker QF1, a second miniature circuit breaker QF2, the CPU module 2, an AI / AO module 3, four analog signal isolators 7, six relays 8, a rail-mounted switch 9, and a mounting position for a rechargeable power supply module 6. (The last sentence appears to be incomplete and possibly refers to a different unit.) Figure 5 The sliding panel shown provides protection, and the interior of the housing 1 also houses the touchscreen 4 and a dense array of terminal blocks.

[0020] The input terminal of the switching power supply 5 is selectively connected to an external AC power source via a first miniature circuit breaker; the power output terminal of the rechargeable power module 6 is selectively connected to the system DC power bus via a second miniature circuit breaker. The first and second miniature circuit breakers are configured to have two operating modes: when the first miniature circuit breaker QF1 is closed and the second miniature circuit breaker QF2 is open, the system DC power bus is powered by the switching power supply 5 and simultaneously charges the rechargeable power module 6; when the first miniature circuit breaker QF1 is open and the second miniature circuit breaker QF2 is closed, the system DC power bus is powered by the rechargeable power module 6.

[0021] The analog input and output channels of AI / AO module 3 are connected to the external terminals on the enclosure 1 through the corresponding analog signal isolators 7. The digital output channel of CPU module 2 is connected to the coil of relay 8, and the external load is driven by the contacts of relay 8. The DIN rail switch 9 is connected to the CPU module 2 to expand the communication interface.

[0022] The power supply module is used to provide DC24V power to the control circuit system, human-machine interface unit and external device under test.

[0023] Specifically: Provides working power: Outputs DC24V through independent terminals to power devices such as transmitters under test.

[0024] Switch status test: The on / off status of external devices is detected through the digital input channel of CPU module 2 and displayed intuitively on the touch screen.

[0025] Analog signal measurement: The 4-20mA or 0-10V signal output by the external device is sent to the AI / AO module 3 through the signal isolator. The PLC program converts it into engineering values ​​such as pressure and temperature according to the set range and displays it on the touch screen.

[0026] Analog signal simulation: A desired engineering value is set via the touch screen, and the PLC program calculates the corresponding digital value. The AI / AO module 3 and the signal isolator output a precise 4-20mA or 0-10V signal to simulate the field signal source and test actuators such as frequency converters and valve positioners.

[0027] Digital output control: The digital output channel is controlled by a touch screen or program to drive the internal relay to control the on / off state of the external circuit.

[0028] Signal Measurement Implementation: Taking the testing of a pressure transmitter as an example. First, connect the transmitter's power supply to the DC24V output terminal of the enclosure. Connect its 4-20mA signal output line to the input terminals of AI channel 1, such as AIW16+ and AIW16-. The current signal flows through the analog signal isolator 7 for isolation and conversion before being sent to the AI / AO module 3. The operator selects "Channel 1" on the touchscreen 4, sets the signal type to "4-20mA," and inputs the transmitter's range, such as 0.0-1.6MPa. The PLC's internal program automatically converts the acquired AD value into the actual pressure value and displays it on the touchscreen in real time, thus completing the performance test of the transmitter.

[0029] Signal simulation implementation method: Refer to Figure 4Let's take testing a frequency converter as an example. Suppose we need to simulate a 10V given signal. Connect the output terminals of AO channel 1 in the enclosure, such as QW18+ and QW18-, to the analog speed input terminal of the frequency converter. On the touch screen 4, enter the "AO Output" page, select "Channel 1", set the output type to "0-10V", and then enter the target value "10.0V" or "100%". The PLC program will calculate the corresponding digital quantity and output a precise 10V voltage signal through the AI / AO module 3 and the analog signal isolator 7, driving the frequency converter to run at its maximum speed.

[0030] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A portable measurement and control box with charging capability, comprising a box body (1), characterized in that, The box (1) is equipped with: The control circuit system, which is mounted on an electrical rail, includes a PLC as the core processing unit, which consists of a CPU module (2) and an AI / AO module (3) connected to the CPU module (2); The human-computer interaction unit is a touch screen (4) that is communicatively connected to the CPU module (2). The power supply module includes a switching power supply (5), a rechargeable power supply module (6), a first miniature circuit breaker, and a second miniature circuit breaker; The input terminal of the switching power supply (5) is selectively connected to an external AC power source through the first miniature circuit breaker. The power output terminal of the rechargeable power module (6) is selectively connected to the system DC power bus via the second miniature circuit breaker. The signal conditioning module includes multiple analog signal isolators (7), and the analog input and output channels of the AI / AO module (3) are respectively connected to the external terminals on the enclosure (1) through the corresponding analog signal isolators (7); The digital output drive module includes multiple relays (8). The digital output channel of the CPU module (2) is connected to the coil of the relay (8), and the external load is driven by the contacts of the relay (8). The network communication module is a rail-mounted switch (9), which is connected to the CPU module (2) and is used to expand the communication interface.

2. The portable measurement and control box with charging capability according to claim 1, characterized in that: The number of analog signal isolators (7) is four.

3. The portable measurement and control box with charging capability according to claim 1, characterized in that: The number of relays (8) is six.

4. The portable measurement and control box with charging capability according to claim 1, characterized in that: The CPU module (2) itself integrates no fewer than six digital input channels.

5. A portable measurement and control box with charging capability according to claim 1, characterized in that: The AI / AO module (3) provides no less than four analog input channels and no less than two analog output channels.

6. A portable measurement and control box with charging capability according to claim 1, characterized in that: The enclosure (1) is equipped with terminal blocks corresponding to all analog input, analog output, digital input, digital output channels and external power supply interfaces.

7. A portable measurement and control box with charging capability according to claim 1, characterized in that: The power supply module is used to provide DC24V power to the control circuit system, human-machine interaction unit and external device under test.

8. A portable measurement and control box with charging capability according to claim 1, characterized in that: The first miniature circuit breaker and the second miniature circuit breaker are configured to have two operating modes: When the first miniature circuit breaker (QF1) is closed and the second miniature circuit breaker (QF2) is open, the system DC power bus is powered by the switching power supply (5) and simultaneously charges the rechargeable power module (6). When the first miniature circuit breaker (QF1) is open and the second miniature circuit breaker (QF2) is closed, the system DC power bus is powered by the rechargeable power module (6).

9. A portable measurement and control box with charging capability according to claim 1, characterized in that: The rechargeable power module (6) includes a charging management module and an energy storage battery pack.

Images