Industrial equipment data acquisition box
By using thermistor NTC in the industrial equipment data acquisition box, adaptive temperature control is achieved, which solves the problem of reduced accuracy and reliability of the acquisition box in harsh environments, and improves data acquisition accuracy and equipment life.
Patent Information
- Application Number
- CN202420942873.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2035-01-15
AI Technical Summary
When the industrial equipment data acquisition box is operating in harsh environments, it is affected by adverse factors such as high temperature, oil pollution, dust and vibration, resulting in reduced accuracy and reliability. The fan temperature control strategy has problems of dust accumulation and temperature fluctuations.
An industrial equipment data acquisition box is designed, using thermistor NTC in series with the cooling fan, and the fan speed is controlled by the resistance value at different temperatures, so as to achieve adaptive temperature control, reduce dust intake and improve the system insulation capacity.
Accurate control of the temperature of the acquisition box is achieved, reducing the risk of dust accumulation, improving the data acquisition accuracy and life of the acquisition box, and reducing the impact of temperature fluctuations on the acquisition accuracy.
Smart Images
Figure CN222764154U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial equipment data acquisition, in particular to an industrial equipment data acquisition box. Background Art
[0002] With the development of science and technology, industrial production is moving towards high efficiency and high precision. High efficiency usually means that the speed of industrial equipment is getting higher and higher, and the production rhythm is getting faster and faster, while high precision means that industrial equipment is sensitive to tiny abnormalities. Any tiny abnormality of the equipment will cause a decrease in accuracy. When high-speed and high-precision industrial equipment fails, it will lead to a decrease in product quality. In serious cases, production cannot be carried out, resulting in failure to deliver on time, affecting the company's reputation.
[0003] In order to ensure that industrial equipment always has high efficiency and high precision, industrial equipment usually needs to be equipped with a complete monitoring system to continuously detect the status of the equipment and notify relevant personnel to intervene when minor abnormalities occur, thereby reducing the risk of unexpected downtime; currently, the most commonly used monitoring hardware on industrial equipment sites is the industrial equipment data acquisition box, whose main function is to continuously collect parameters representing the performance of industrial equipment, such as current, vibration, temperature, speed and other information.
[0004] However, the environment at industrial sites is harsh, with many unfavorable factors such as high temperature, oil, dust, vibration, etc. These unfavorable factors will not only affect the performance and reliability of industrial equipment, but also seriously affect the accuracy and reliability of the acquisition box; for example, high temperature will not only reduce the life of electronic components, but also cause temperature drift in the parameters of electronic components, resulting in reduced acquisition accuracy, while oil and dust will lead to a decrease in electrical insulation strength, and voltage discharge problems may occur, thereby damaging the device, while vibration will cause loose connections of components, fatigue damage, and ultimately cause equipment failure.
[0005] In order to eliminate the impact of high temperature on the acquisition box, active and passive temperature control methods are currently used to dissipate heat for the data acquisition box. Passive temperature control is to install a heat conductive sheet in the acquisition box to dissipate heat for key components. Active temperature control generally uses a fan for convection heat dissipation. Usually there are two control strategies for the fan. One is that the fan runs continuously for 24 hours, and the other is to set a temperature sensor to start the fan when the temperature exceeds a certain threshold. However, continuous operation of the fan will cause dust to accumulate in the acquisition box, which will cause damage to the acquisition box components. If the fan is operated only when the temperature exceeds the set threshold, the temperature fluctuation in the acquisition box will be relatively large, which will reduce the accuracy of the acquisition box. The vibration generated by the fan motor in the dust state also affects the performance of the acquisition box. Therefore, a new active temperature control strategy is needed to control the temperature of the acquisition box. Utility Model Content
[0006] The purpose of the utility model is to provide an industrial equipment data acquisition box to solve the problems raised in the above background technology.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] The utility model provides an industrial equipment data acquisition box, comprising a front panel, a chassis and a rear panel, wherein the front panel is provided with a power switch, an LCD screen, an LED indicator light and a buzzer, a communication interface and an SD card are provided on one side of the LCD screen, a power supply and an interface conversion board are provided in the chassis, a main processing board is provided on one end of the interface conversion board close to the front panel, a data input interface is provided on the rear panel, and DC power supply terminals and a cooling fan are provided on both sides of the data input interface.
[0009] Preferably, the chassis is also provided with an AD conversion chip, an ARM chip and a FPGA chip.
[0010] Preferably, the communication interface includes an Ethernet wired interface and a USB interface.
[0011] Preferably, the data input interface is a four-channel analog input interface, the input signal of the data input interface is a BNC terminal interface, and the BNC terminal interface includes an AI1 interface, an AI2 interface, an AI3 interface and an AI4 interface.
[0012] Preferably, the supply voltage range of the DC power supply terminal is 10VDC to 30VDC.
[0013] Preferably, one end of the cooling fan is connected to a thermistor, the thermistor is a negative temperature coefficient thermal resistor NTC, and the cooling fan, the thermistor and the power supply are connected in series.
[0014] The beneficial effects of the utility model are:
[0015] 1. The industrial equipment data acquisition box of the utility model can adjust the speed of the fan according to the temperature of the components, so as to accurately control the temperature of the acquisition box and ensure the data acquisition accuracy of the data acquisition box.
[0016] 2. The fan speed adjustment of the utility model can reduce the dust sucked into the data acquisition box, thereby ensuring the cleanliness of the data acquisition box, improving the insulation capacity of the entire system, and increasing the life of the acquisition box.
[0017] 3. The utility model does not require a complicated control circuit and has the advantages of simple structure and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 This is a schematic diagram of the rear panel structure of the utility model;
[0020] Figure 3 This is a schematic diagram of the temperature control circuit of the utility model.
[0021] Reference numerals
[0022] 1-power switch, 2-LCD screen, 3-LED indicator light, 4-buzzer, 5-Ethernet wired interface, 6-USB interface, 7-SD card, 8-power supply, 9-interface conversion board, 10-main processing board, 11-data input interface, 12-DC power supply terminal, 13-cooling fan, 14-thermistor. DETAILED DESCRIPTION
[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0024] Example
[0025] like Figure 1-3 As shown, an industrial equipment data acquisition box includes a front panel, a chassis and a rear panel. The front panel is provided with a power switch 1, an LCD screen 2, an LED indicator light 3 and a buzzer 4. A communication interface and an SD card 7 are provided on one side of the LCD screen 2. A power supply 8 and an interface conversion board 9 are provided in the chassis. The power supply 8 supplies power to the entire data acquisition box. The input analog signal is converted into a digital signal through the interface conversion board 9. A main processing board 10 is provided at one end of the interface conversion board 9 close to the front panel. The digital signal is processed and communicated with other devices through the main processing board 10. A data input interface 11 is provided on the rear panel. A DC power supply terminal 12 and a cooling fan 13 are provided on both sides of the data input interface 11.
[0026] The chassis is also equipped with an AD conversion chip, an ARM chip and a FPGA chip. The communication interface is completed by the ARM chip, and the analog quantity collection is completed by the FPGA chip.
[0027] The communication interface includes an Ethernet wired interface 5 and a USB interface 6 for communicating with a host computer, and the communication interface functions are completed by an ARM chip.
[0028] The data input interface 11 is a four-channel analog input interface used for industrial equipment data acquisition. The analog quantity acquisition is completed through the high-speed AD conversion chip set inside the data acquisition box. The input signal of the data input interface 11 is a BNC terminal interface. The BNC terminal interface includes AI1 interface, AI2 interface, AI3 interface and AI4 interface. The external sensor is connected to the BNC terminal interface via a BNC cable.
[0029] One end of the cooling fan 13 is connected to a thermistor 14, which is a negative temperature coefficient thermal resistor NTC. The cooling fan 13, the thermistor 14 and the power supply 8 are connected in series. The cooling fan 13 is powered by the power supply 8, and the speed of the cooling fan 13 is controlled by changing the NTC resistance value of the thermistor 14 at different temperatures.
[0030] like Figure 1 As shown, the operating status of the industrial equipment is divided into: when it is in a normal state, the LED indicator 3 is green; when it is in an alarm state, that is, when any characteristic value extracted by the data acquisition box exceeds the threshold by 20%, the LED indicator 3 is yellow, and the alarm information is displayed on the LCD screen 2; when it is in a fault state, that is, when any characteristic value extracted by the data acquisition box exceeds the threshold by more than 20%, the status display LED indicator 3 is flashing red, and the buzzer 4 emits a continuous sound, and the fault location and severity flash on the LCD screen 2. Here, when the alarm state and the fault state appear, the information of the sensors collected by all the above channels will be saved in real time to the SD card 7, so as to further analyze the reasons for the abnormal operation of the industrial equipment later.
[0031] like Figure 2 As shown, the analog data input interface 11 adopts a BNC interface, and the analog quantity is collected by a high-speed AD conversion chip arranged inside the data acquisition box; the collected signal is processed by the collected industrial equipment signal inside the data acquisition box, and the collected signal is subjected to feature extraction, status monitoring and fault alarm inside the data acquisition box; an ARM chip is arranged inside the data acquisition box, and the communication interface is completed by the ARM chip; an FPGA chip is arranged inside the data acquisition box, and the analog quantity collection is completed by the FPGA chip.
[0032] like Figure 3 As shown, the output end of the power supply 8 is connected to the thermistor 14, and the other end of the thermistor 14 is connected to the cooling fan 13. The rotation speed of the cooling fan 13 is controlled by changing the NTC resistance at different temperatures to achieve adaptive temperature control.
[0033] In the utility model, when the equipment operates normally, the LED indicator 3 is green, and the extracted features are displayed on the LCD screen 2; when any feature value exceeds the threshold by less than 20%, it is an alarm state, the LED indicator 3 turns yellow, and the LCD screen 2 displays the alarm location and feature parameters; when any feature value exceeds the threshold by more than 20%, it is a fault state, the LED indicator 3 is flashing red, and the buzzer 4 continuously sounds, and the fault location and severity flash on the LCD screen 2; when the alarm state and the fault state occur, the collected signal is stored in the SD card 7 of the data acquisition box for later in-depth processing.
[0034] Regarding the temperature control strategy of the data acquisition box, the utility model installs a thermistor 14 on the AD conversion chip that affects the accuracy of the acquisition box. One end of the thermistor 14 is connected to a 24V DC power supply, and the other end is connected to a cooling fan 13. The thermistor 14 uses a negative temperature coefficient resistor NTC, and the power supply 8 is divided by the thermistor 14 and the cooling fan 13 in series; when the temperature of the AD conversion chip is high, the resistance of the thermistor 14 is low, and the voltage applied to the cooling fan 13 is high, and the speed of the cooling fan 13 is linearly related to the applied voltage, so a high voltage means a high speed of the cooling fan 13, and the heat removed by the convection of the cooling fan 13 is high. The amount is high, so the temperature of the AD conversion chip can be reduced; when the temperature of the AD conversion chip is low, the resistance of the thermistor 14 increases, and the voltage applied to the cooling fan 13 is low, so the speed of the cooling fan 13 is reduced, and the heat taken away by the convection of the cooling fan 13 is small, so the temperature of the AD conversion chip can be stabilized; because the speed of the cooling fan 13 is controlled by the temperature of the AD conversion chip, the actual speed of the cooling fan 13 is dynamically adjusted according to the chip temperature, which greatly reduces the temperature fluctuation of the AD conversion chip; in addition, because the average speed of the cooling fan 13 is lower than the rated speed of the fan, the dust sucked into the collection box is also greatly reduced.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.
Claims
1. An industrial equipment data acquisition box, comprising a front panel, a chassis and a rear panel, characterized in that: The front panel is provided with a power switch (1), an LCD screen (2), an LED indicator light (3) and a buzzer (4); one side of the LCD screen (2) is provided with a communication interface and an SD card (7); a power supply (8) and an interface conversion board (9) are provided in the chassis; a main processing board (10) is provided at one end of the interface conversion board (9) close to the front panel; a data input interface (11) is provided on the rear panel; and a DC power supply terminal (12) and a cooling fan (13) are provided on both sides of the data input interface (11).
2. The industrial equipment data acquisition box according to claim 1, characterized in that: The chassis is also provided with an AD conversion chip, an ARM chip and a FPGA chip.
3. The industrial equipment data acquisition box according to claim 1, characterized in that: The communication interface comprises an Ethernet wired interface (5) and a USB interface (6).
4. The industrial equipment data acquisition box according to claim 1, characterized in that: The data input interface (11) is a four-channel analog input interface, and the input signal of the data input interface (11) is a BNC terminal interface, and the BNC terminal interface includes an AI1 interface, an AI2 interface, an AI3 interface and an AI4 interface.
5. The industrial equipment data acquisition box according to claim 1, characterized in that: The supply voltage range of the DC power supply terminal (12) is 10VDC to 30VDC.
6. The industrial equipment data acquisition box according to claim 1, characterized in that: One end of the heat dissipation fan (13) is connected to a thermistor (14), wherein the thermistor (14) is a negative temperature coefficient thermal resistor (NTC), and the heat dissipation fan (13), the thermistor (14) and the power supply (8) are connected in series.