Signal acquisition and conversion control panel and cooling equipment

Abstract

The utility model discloses a signal acquisition and conversion control panel and cooling equipment, the signal acquisition and conversion control panel is used in industrial water cooling equipment, the signal acquisition and conversion control panel specifically comprises a power supply module, a control module, an acquisition module and an output module, the power supply module comprises two voltage stabilizers, and the voltage stabilizers are used for step-by-step voltage reduction of an external power supply; the control module comprises a micro-control chip electrically connected with the power supply module; the acquisition module is provided with a plurality of signal acquisition units and is used for acquiring multipath analog signals. The signal conversion circuit is arranged in the micro-control chip and can convert multiple paths of analog signals into multiple paths of pulse signals, and the multiple paths of pulse signals are respectively output by the signal output unit of the output module, so that the signals of multiple sensors can be respectively collected, converted and output, and the effect of being compatible with the multiple sensors is achieved.

Description

Technical Field

[0001] The present application relates to the field of cooling equipment, and in particular to a signal acquisition and conversion control board and cooling equipment. Background Art

[0002] Analog signal to pulse signal conversion boards are primarily used to collect different signals from industrial chiller sensors, enabling different types of signal conversion. Chiller control boards only collect one type of signal, making expansion and compatibility with other sensor types difficult. Utility Model Content

[0003] The present application proposes a signal acquisition and conversion control board and a cooling device, which can acquire signals from sensors in multiple channels.

[0004] This application proposes a signal acquisition and conversion control board for industrial chillers, comprising:

[0005] A power supply module includes two voltage regulators, which are used to step down the voltage of an external power supply;

[0006] A control module, comprising a microcontroller chip electrically connected to the power module, wherein the microcontroller chip has a built-in signal conversion circuit;

[0007] An acquisition module, electrically connected to the control module, for acquiring analog signals, wherein the acquisition module comprises a plurality of signal acquisition units; the analog signals are converted into pulse signals by the signal conversion circuit;

[0008] The output module is electrically connected to the control module and is used to output a pulse signal. The output module has a plurality of signal output units.

[0009] In some embodiments, the power supply module includes a first voltage regulator and a second voltage regulator, a first capacitor, a second capacitor and a first connector are connected in parallel between the input end and the ground end of the first voltage regulator, one end of the first connector is grounded, and the other end is electrically connected to the power supply; a third capacitor is connected in parallel with the output end of the first voltage regulator and the ground end, and the input end of the second voltage regulator and the ground end are also connected in parallel with the third capacitor; a fourth capacitor, a fifth capacitor and a sixth capacitor are also connected in parallel between the output end of the second voltage regulator and the ground end.

[0010] In some embodiments, the signal acquisition unit includes a first voltage-dividing resistor and a second voltage-dividing resistor connected in series with the microcontrol chip, and a decoupling capacitor connected in parallel with the second voltage-dividing resistor, the second voltage-dividing resistor is connected to one end of the first voltage-dividing resistor for electrical connection to the sensor, and the other end of the second voltage-dividing resistor is grounded.

[0011] In some embodiments, the acquisition module includes a second connector and four signal acquisition units. One end of the second voltage-dividing resistor connected to the ground is electrically connected to a pin of the second connector; the end of the second voltage-dividing resistor electrically connected to the first voltage-dividing resistor is also respectively and correspondingly electrically connected to the remaining pins of the second connector.

[0012] In some embodiments, the signal output unit includes a transistor, a first current-limiting resistor connected in series with the base of the transistor and the microcontroller chip, a second current-limiting resistor with two ends respectively and correspondingly electrically connected to the microcontroller chip and the emitter of the transistor, a third current-limiting resistor connected in series with the collector of the transistor, and a bypass capacitor connected in parallel with the emitter and the collector of the transistor; the emitter of the transistor is grounded.

[0013] In some embodiments, the output module includes a fourth connector and three signal output units. The fourth connector includes four pins, one of which is grounded, and the other three pins are respectively and correspondingly electrically connected to the collectors of the three transistors.

[0014] In some embodiments, the signal output unit further includes three working capacitors. One end of the three working capacitors is respectively electrically connected to the grounded pin of the fourth connector, and the other end is respectively and correspondingly electrically connected to the remaining three pins of the fourth connector.

[0015] In some embodiments, the acquisition and conversion control board further includes a third connector. The third connector includes three pins, one of which is grounded, and the other three pins are respectively and correspondingly electrically connected to the power supply circuit, the SCLK and SDA pins of the microcontroller chip.

[0016] In some embodiments, the microcontroller chip further includes a GND pin and a VDD pin. The GND pin is grounded, the VDD pin is electrically connected to the output end of the second voltage regulator, and an external capacitor is also connected in parallel between the GND pin and the VDD pin.

[0017] The present application also proposes a cooling device, which includes the above-mentioned signal acquisition and conversion control board, and the cooling device further includes a chassis for installing the signal acquisition and conversion control board.

[0018] This application proposes a signal acquisition conversion control board and a cooling device. The signal acquisition conversion control board includes a power supply module, a control module, an acquisition module, and an output module. The power supply module includes two voltage regulators, which are used to step down the external power supply in stages. The control module includes a microcontroller chip electrically connected to the power supply module. The acquisition module has multiple signal acquisition units for acquiring multiple analog signals. The microcontroller chip is built-in with a signal conversion circuit, which can convert multiple analog signals into multiple pulse signals and output them respectively by the signal output units of the output module. Thus, the signals of multiple sensors can be acquired, converted, and output respectively, achieving the effect of being compatible with multiple sensors. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the functional modules of the signal acquisition conversion control board in an embodiment of this application;

[0020] Figure 2 It is a circuit diagram of the power supply module in another embodiment of this application;

[0021] Figure 3 It is a circuit diagram of the control module in another embodiment of this application;

[0022] Figure 4 It is a circuit diagram of the signal acquisition unit in another embodiment of this application;

[0023] Figure 5 It is a circuit diagram of the signal output unit in another embodiment of this application;

[0024] Figure 6 It is a circuit diagram of the signal output unit in another embodiment of this application;

[0025] Figure 7 It is a circuit diagram of the signal output unit in another embodiment of this application;

[0026] Figure 8 It is a circuit diagram of the fourth connector in another embodiment of this application.

[0027] Label Description:

[0028] 10. Power supply module; 20. Control module; 30. Acquisition module; 40. Output module.

[0029] The realization of the purpose, functional characteristics, and advantages of this application will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0030] Next, the solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments in the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0031] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture as shown in the accompanying drawings. If this specific posture changes, then the directional indication will also change accordingly.

[0032] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0033] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0034] The present application proposes a signal acquisition conversion control board, referring to Figures 1 to 3, the signal acquisition and conversion control board includes a power supply module 10, a control module 20, an acquisition module 30, and an output module 40. The power supply module 10 includes two voltage regulators for step-down conversion of the external power supply. The control module 20 includes a microcontroller chip electrically connected to the power supply module 10, and a signal conversion circuit is built into the microcontroller chip. The acquisition module 30 is electrically connected to the control module 20 and is used to acquire analog signals. The acquisition module 30 has multiple signal acquisition units. The analog signals are converted into pulse signals by the signal conversion circuit. The output module 40 is electrically connected to the control module 20 and is used to output pulse signals. The output module 40 has multiple signal output units. The signal acquisition and conversion control board acquires sensor signals through multiple signal acquisition units, converts them into pulse signals, and outputs them through the output module 40, which can be compatible with various sensors. In specific applications, the signal acquisition and conversion control board can be used in industrial cold water equipment, which is electrically connected to temperature sensors, speed sensors, flow rate sensors, etc. in the industrial cold water equipment. The data of the above sensors can be converted into corresponding temperature data, speed data, flow rate data, etc. after being processed by the control board, so as to monitor the operating state of the equipment.

[0035] In some embodiments, referring to Figure 2 , the power supply module 10 includes a first voltage regulator and a second voltage regulator. A first capacitor C1, a second capacitor C2, and a first connector JP1 are connected in parallel between the input terminal and the ground terminal of the first voltage regulator. One end of the first connector JP1 is grounded, and the other end is electrically connected to the power supply. A third capacitor is connected in parallel between the output terminal and the ground terminal of the first voltage regulator. The input terminal and the ground terminal of the second voltage regulator are also connected in parallel with the third capacitor C3. A fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6 are also connected in parallel between the output terminal and the ground terminal of the second voltage regulator.

[0036] In this embodiment, the first connector JP1 provides a 3.3V and a GND pin, facilitating external devices to obtain power. The power supply module 10 uses two voltage regulators, with model numbers 7809 and AMS1117-3V3 respectively. The first voltage regulator has a model number of 7809, and 7809 is a positive 9V voltage regulator that converts the input voltage into a stable 9V output voltage. The first capacitor C1 and the second capacitor C2 are decoupling capacitors at the input end, used to suppress power supply noise. The third capacitor C3 is a decoupling capacitor at the output end. AMS1117-3V3 is a positive 3.3V voltage regulator, used to further reduce the 9V input voltage to a 3.3V output voltage. The fourth capacitor C4 and the fifth capacitor C5 are decoupling capacitors at the input end, and the sixth capacitor C6 is a decoupling capacitor at the output end. Decoupling capacitors are mainly used to suppress transient voltage fluctuations and noise on the power supply line. They are usually placed between the power supply and the ground, close to the power supply pin, to reduce the impact of ripples and noise on the power supply line on the circuit performance. 7809 is a three-terminal voltage regulator with a fixed output voltage of +9V, used to convert the input voltage into a stable +9V output. AMS1117-3.3V is a low-dropout linear voltage regulator, used to further step down the +9V voltage to a +3.3V output. This combination can meet the different voltage requirements of different parts in the circuit.

[0037] In some embodiments, referring to Figure 3 and Figure 4 , the control module 20 includes a microcontroller chip; the signal acquisition unit includes a first voltage-dividing resistor (R5 / R6 / R7 / R8) and a second voltage-dividing resistor (R1 / R2 / R3 / R4) connected in series with the microcontroller chip in sequence, and a decoupling capacitor (C8 / C9 / C10 / C11) connected in parallel with the second voltage-dividing resistor. One end of the second voltage-dividing resistor connected to the first voltage-dividing resistor is used to be electrically connected to the sensor, and the other end of the second voltage-dividing resistor is grounded. The acquisition module 30 includes a second connector JP2 and four signal acquisition units. The grounded end of the second voltage-dividing resistor is electrically connected to a pin of the second connector JP2; the end of the second voltage-dividing resistor electrically connected to the first voltage-dividing resistor is also respectively and correspondingly electrically connected to the remaining pins of the second connector JP2.

[0038] The models of the microcontroller chips include M9F680, which is a microcontroller chip with 28 pins. Some of the important pins are as follows: AD12 - AD15: These are analog input ports used to receive analog signals. They may be connected to devices such as temperature sensors and pressure sensors so that the microcontroller can obtain environmental parameters. In terms of signal acquisition, if external devices or sensors need to communicate with the microcontroller chip via the I2C bus, they are usually connected to the SCL and SDA pins. However, since JP2 only contains address bus pins, it is not an interface directly used for signal acquisition. Signal acquisition usually involves the input of analog signals, which generally requires the signal conversion circuit built into the microcontroller chip for conversion.

[0039] A signal acquisition unit is also required between the second connector JP2 and the microcontroller chip for acquisition and processing. The signal acquisition unit includes a first voltage - dividing resistor and a second voltage - dividing resistor connected in series with the microcontroller chip in sequence, and a decoupling capacitor connected in parallel with the second voltage - dividing resistor. The other end of the second voltage - dividing resistor is grounded. The first voltage - dividing resistor includes R5, R6, R7, and R8, which are respectively electrically connected to AD12 - AD15 one - to - one. The second voltage - dividing resistor includes R1, R2, R3, and R4, and the decoupling capacitor includes C8, C9, C10, and C11. In Figure #, the first voltage - dividing resistor R5 can limit the current passing through them to prevent excessive current from damaging other components in the circuit. When resistors are connected in series, they can form a voltage divider that distributes the total voltage proportionally to each resistor. Referring to Figure #, in combination with R1 and C8, they form an RC circuit, and this combination has a low - pass filtering characteristic that can suppress high - frequency noise and allow lower - frequency signals to pass through.

[0040] In some embodiments, referring to Figures 5 to 8, the signal output unit includes transistors (Q1 / Q2 / Q3), first current-limiting resistors (R11 / R13 / R16) connected in series with the bases of the transistors and the microcontroller chip, second current-limiting resistors (R12 / R14 / R17) with both ends electrically connected to the microcontroller chip and the emitters of the transistors in one-to-one correspondence, third current-limiting resistors (R9 / R10 / R15) connected in series with the collectors of the transistors, and bypass capacitors (C13 / C14 / C15) connected in parallel with the emitters and collectors of the transistors; the emitters of the transistors are grounded. The three resistors R11, R13, and R16 are all 1kΩ fixed resistors, which may be used to limit the current flowing through the corresponding transistors or field effect transistors. At the PWM output port, these resistors may be connected in series with the transistors or field effect transistors to form a voltage division network for adjusting the output voltage. In addition, they can also protect the transistors from excessive current surges. The three resistors R12, R14, and R17 are also 1kΩ fixed resistors, which may also be used to limit the current flowing through the corresponding transistors or field effect transistors. At the PWM output port, these resistors may be connected in series with the transistors or field effect transistors to form a voltage division network for adjusting the output voltage. In addition, they can also protect the transistors from excessive current surges.

[0041] The microcontroller M9F680 provides three PWM output pins (Pwm01, Pwm02, and Pwm03). These pins can directly drive low-current loads or drive high-current loads through appropriate drive circuits. For each PWM output, an NPN transistor (S9013) is used to amplify the current. The base of the transistor is connected to the corresponding PWM output pin, so that when the PWM signal is high, the transistor conducts, allowing current to flow through the load; when the PWM signal is low, the transistor cuts off, cutting off the current. This method can effectively control the average current on the load and thus control the behavior of the load. Although the load is not explicitly shown in the circuit diagram, these PWM outputs are usually used to drive motors, LED arrays, or other devices that require controlled current. The bypass capacitors C13, C14, and C15 are used to reduce EMI (electromagnetic interference) and RFI (radio frequency interference) caused by the PWM signal, especially during high-speed PWM operation. They help absorb and attenuate switching transients and reduce the impact on external devices. C13, C14, and C15 are small capacitors with capacitances of 0.1 microfarads respectively, also known as ceramic capacitors. These small-capacity capacitors are usually used for coupling, decoupling, or bypass applications. In the circuit, they can help suppress high-frequency noise and ensure that the signal can be correctly transmitted to the next stage. C13 and C14 are used for decoupling of the PWM output port to prevent power supply fluctuations from affecting the quality of the output signal. C15 is used for another PWM output port to play a similar role.

[0042] JP4 is used to select different PWM output configurations or disconnect the PWM signal during debugging. Resistors R16 and R17: These resistors are used to limit the current flowing through the base of the transistor to ensure the safe operation of the transistor. This output module 40 is designed to control the operating state of an external device through the PWM signal generated by the microcontroller. By adjusting the duty cycle of the PWM signal (i.e., the ratio of the high-level duration to the period), the operating parameters of the device can be finely controlled.

[0043] In some embodiments, referring to Figure 3 , the acquisition and conversion control board further includes a third connector JP3. The third connector JP3 includes three pins, one of which is grounded, and the other three pins are respectively electrically connected to the power circuit, the SCLK and SDA pins of the microcontroller chip in one-to-one correspondence. SDA and SCLK are I2C bus interface pins for communicating with other devices that support the I2C protocol. The microcontroller chip also includes a GND pin and a VDD pin. The GND pin is grounded and the VDD pin is electrically connected to the output terminal of the second voltage regulator. An external capacitor is also connected in parallel between the GND pin and the VDD pin. The external capacitor C7 is a relatively large capacitor with a capacitance of 3.3 microfarads. Such a large-capacity capacitor is usually used for power filtering to reduce the impact of power noise on the circuit. In digital circuits, especially those containing high-speed logic gates, power noise can cause incorrect results. C7 is designed to ensure power stability and improve circuit performance.

[0044] This application also proposes a cooling device, which includes the above-mentioned signal acquisition and conversion control board. The cooling device further includes a chassis for installing the signal acquisition and conversion control board. The chassis can provide a certain degree of protection for the control board.

[0045] In the embodiments of this application, the working principles of the signal acquisition and conversion control board and the cooling device are as follows:

[0046] The two voltage regulators of the power module can be used to step down the external power supply in stages and supply power to the microcontroller chip in the control module; the acquisition module has multiple signal acquisition units for acquiring multiple analog signals. The microcontroller chip is built-in with a signal conversion circuit that can convert multiple analog signals into multiple pulse signals, which are respectively output by the signal output unit of the output module. The signal acquisition and conversion control board can respectively acquire, convert and output the signals of multiple sensors, achieving the effect of being compatible with multiple sensors. In specific applications, the signal acquisition and conversion control board can be used for industrial cold water equipment, which is electrically connected to temperature sensors, speed sensors, flow rate sensors, etc. in the industrial cold water equipment. The data of the above sensors can be converted by the control board to form corresponding temperature data, speed data, flow rate data, etc., so as to monitor the operating state of the equipment.

[0047] The above are only partial or preferred embodiments of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the overall concept of the present application, or any direct / indirect application in other related technical fields, is included in the scope of protection of the present application.

Claims

1. A signal acquisition conversion control board, characterized in that, The signal acquisition, conversion, and control are used in industrial cold water equipment and include: A power supply module, including two voltage regulators for step-down voltage regulation of the external power supply. A control module, including a microcontroller chip electrically connected to the power supply module, with a signal conversion circuit built into the microcontroller chip. An acquisition module, electrically connected to the control module for acquiring analog signals. The acquisition module has multiple signal acquisition units. The analog signals are converted into pulse signals by the signal conversion circuit. An output module, electrically connected to the control module for outputting pulse signals. The output module has multiple signal output units.

2. The signal acquisition conversion control board according to claim 1, characterized in that The power supply module includes a first voltage regulator and a second voltage regulator. A first capacitor, a second capacitor, and a first connector are connected in parallel between the input terminal and the ground terminal of the first voltage regulator. One end of the first connector is grounded, and the other end is connected to the power supply. A third capacitor is connected in parallel between the output terminal and the ground terminal of the first voltage regulator. The input terminal and the ground terminal of the second voltage regulator are also connected in parallel with the third capacitor. A fourth capacitor, a fifth capacitor, and a sixth capacitor are also connected in parallel between the output terminal and the ground terminal of the second voltage regulator.

3. The signal acquisition and conversion control board according to claim 2, wherein Each signal acquisition unit includes a first voltage-dividing resistor and a second voltage-dividing resistor connected in series with the microcontroller chip in sequence, and a decoupling capacitor connected in parallel with the second voltage-dividing resistor. One end of the second voltage-dividing resistor connected to the first voltage-dividing resistor is used to connect to the sensor, and the other end of the second voltage-dividing resistor is grounded.

4. The signal acquisition conversion control board according to claim 3, characterized in that The acquisition module includes a second connector and four signal acquisition units. The grounded end of the second voltage-dividing resistor is electrically connected to one pin of the second connector. The end of the second voltage-dividing resistor connected to the first voltage-dividing resistor is also electrically connected to the remaining pins of the second connector in one-to-one correspondence.

5. The signal acquisition and conversion control board according to claim 4, characterized in that Each signal output unit includes a transistor, a first current-limiting resistor connected in series between the base of the transistor and the microcontroller chip, a second current-limiting resistor with both ends electrically connected to the microcontroller chip and the emitter of the transistor in one-to-one correspondence, a third current-limiting resistor connected in series with the collector of the transistor, and a bypass capacitor connected in parallel between the emitter and the collector of the transistor. The emitter of the transistor is grounded.

6. The signal acquisition and conversion control board according to claim 5, wherein The output module includes a fourth connector and three signal output units. The fourth connector includes four pins, one of which is grounded, and the other three pins are electrically connected to the collectors of the three transistors in one-to-one correspondence.

7. The signal acquisition conversion control board according to claim 6, characterized in that, Each signal output unit further includes three working capacitors. One end of each of the three working capacitors is electrically connected to the grounded pin of the fourth connector, and the other end is electrically connected to the remaining three pins of the fourth connector in one-to-one correspondence.

8. The signal acquisition and conversion control board according to claim 7, characterized in that The acquisition and conversion control board further includes a third connector, which includes three pins, one of which is grounded, and the other three pins are electrically connected to the power supply circuit, the SCLK and SDA pins of the microcontroller chip in one-to-one correspondence.

9. The signal acquisition conversion control board according to claim 8, characterized in that, The microcontroller chip further includes a GND pin and a VDD pin. The GND pin is grounded, the VDD pin is electrically connected to the output terminal of the second voltage regulator, and an external capacitor is also connected in parallel between the GND pin and the VDD pin.

10. A cooling device, characterized in that, The cooling device further includes a chassis for mounting the signal acquisition and conversion control board including the signal acquisition and conversion control board according to any one of claims 1 to 9.

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