Power supply device and data acquisition instrument

Abstract

The utility model discloses a power supply device and a data acquisition instrument. The power supply device comprises a control module, at least two voltage conversion modules and a gating switch module, the enabling output end of the control module is connected with the enabling input end of the voltage conversion module, and the control module is used for controlling the enabling state of the voltage conversion module; the output end of each voltage conversion module is connected with one fixed end of the gating switch module, the movable end of the gating switch module is used as the output end of the power supply device, and the control end of the gating switch module is connected with the gating output end of the control module; the control module is also used for gating the movable end and a fixed end of the gating switch module. And the application range of the power supply device is enlarged, so that the application range of the data acquisition instrument is enlarged. The short circuit risk of different voltage conversion modules is avoided, and the reliability of the power supply device is improved. And moreover, the power supply device can be prevented from being disassembled in the voltage conversion process, and the influence of water and oxygen in the external environment on the power supply device is reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of data acquisition, and in particular to a power supply device and a data acquisition instrument. Background Art

[0002] The data acquisition device can be connected to the flow meter for communication and collection of flow meter data. While collecting data, the data acquisition device can function as an external power source to power the flow meter, enabling the communication chip within the flow meter to operate. For example, the flow meter can be equipped with an RS485 chip, and the data acquisition device can communicate with the flow meter via the RS485 communication protocol. When the flow meter is powered by a battery, the RS485 chip is inoperative. When the data acquisition device is powering the flow meter, the RS485 chip operates.

[0003] Different flowmeters require different external power supply voltages, requiring them to be compatible with different data acquisition devices, limiting the data acquisition device's application range. For example, if a flowmeter requires a 5V external power supply, the data acquisition device communicating with it must also provide a 5V power supply. If a flowmeter requires a 12V external power supply, the data acquisition device communicating with it must also provide a 12V power supply. Different flowmeters require different data acquisition devices, limiting the data acquisition device's application range. Utility Model Content

[0004] The utility model provides a power supply device and a data acquisition instrument to increase the application range of the data acquisition instrument.

[0005] In a first aspect, an embodiment of the present utility model provides a power supply device, which is arranged in a data acquisition instrument, and the power supply device includes a control module, at least two voltage conversion modules and a gate switch module;

[0006] The enable output terminal of the control module is connected to the enable input terminal of the voltage conversion module, and the control module is used to control the enable state of the voltage conversion module; the output terminal of each voltage conversion module is connected to a fixed terminal of the selection switch module, the active terminal of the selection switch module serves as the output terminal of the power supply device, and the control terminal of the selection switch module is connected to the selection output terminal of the control module; the control module is also used to select the active terminal of the selection switch module and one of the fixed terminals.

[0007] Optionally, at least two of the voltage conversion modules include a first voltage conversion module and a second voltage conversion module, and the gate switch module includes a relay and a drive unit;

[0008] The output end of the first voltage conversion module is connected to the first fixed pin of the relay, the output end of the second voltage conversion module is connected to the second fixed pin of the relay, the active pin of the relay serves as the output end of the power supply device, the coil drive pin of the relay is connected to the output end of the drive unit, and the input end of the drive unit is connected to the selection output end of the control module; the control module is used to control the drive signal output by the drive unit to control the setting or resetting of the relay.

[0009] Optionally, the relay is a magnetic latching relay.

[0010] Optionally, the power supply device also includes a detection module; the control end of the detection module is connected to the detection output end of the control module, the input end of the detection module is connected to the output end of the power supply device, and the output end of the detection module is connected to the detection input end of the control module. The control module is also used to control the detection module to detect the output voltage of the power supply device after the selection switch module is selected, and control the selection switch module to maintain the current state when the output voltage is within a preset voltage range.

[0011] Optionally, the detection module includes a controllable switch unit and a voltage divider unit; the control end of the controllable switch unit is connected to the detection output end of the control module, the first end of the controllable switch unit is connected to the output end of the power supply device, the second end of the controllable switch unit is connected to the first end of the voltage divider unit, the second end of the voltage divider unit is connected to the ground end, and the output end of the voltage divider unit is connected to the detection input end of the control module.

[0012] Optionally, the controllable switch unit includes a first transistor and a second transistor;

[0013] The base of the first transistor is connected to the detection output end of the control module, the collector of the first transistor is connected to the base of the second transistor, the emitter of the first transistor is connected to the ground end, the collector of the second transistor is connected to the output end of the power supply device, and the emitter of the second transistor is connected to the first end of the voltage divider unit.

[0014] Optionally, the voltage dividing unit includes a first voltage dividing resistor, a second voltage dividing resistor, a current limiting resistor and a first capacitor;

[0015] The first end of the first voltage-dividing resistor is connected to the second end of the controllable switch unit, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor and the first end of the current-limiting resistor, the second end of the second voltage-dividing resistor and the second end of the first capacitor are connected to the ground end, and the second end of the current-limiting resistor is connected to the first end of the first capacitor and serves as the output end of the voltage-dividing unit.

[0016] Optionally, the power supply device further includes a power supply module, which is connected to the control module, the voltage conversion module and the gating switch module and is used to supply power to the control module, the voltage conversion module and the gating switch module.

[0017] Optionally, the power supply module includes a power supply unit and a voltage conversion unit;

[0018] The power supply unit is connected to the voltage conversion module and is used to supply power to the voltage conversion module; the voltage conversion unit is connected to the power supply unit, and the control module and the selection switch module are connected to the voltage conversion unit, and the voltage conversion unit is used to perform voltage conversion on the voltage output by the power supply unit and then supply power to the control module and the selection switch module.

[0019] In a second aspect, an embodiment of the present invention further provides a data acquisition instrument, comprising the power supply device described in the first aspect.

[0020] The technical solution of the embodiment of the present utility model is to control the active end of the gating switch module to be connected to different fixed ends through the control module, and at the same time control the voltage conversion module corresponding to the fixed end connected to the active end to be in an enabled state, so that different voltage conversion modules can supply power to the load connected to the power supply device. In this way, the power supply device can provide power of different voltages to different loads, thereby increasing the scope of use of the power supply device. When the power supply device is applied to a data acquisition instrument, the data acquisition instrument can be connected to flow meters with different voltage requirements, thereby increasing the scope of use of the data acquisition instrument. During the voltage switching process, the active end of the gating switch module is only connected to one fixed end, avoiding the output ends of different voltage conversion modules from being connected to the active end of the gating switch module at the same time, avoiding the risk of short circuit of different voltage conversion modules, and improving the reliability of the power supply device. Moreover, the voltage switching process can be realized by the control module, thereby avoiding the need to disassemble the power supply device during the voltage conversion process, thereby reducing the impact of water and oxygen in the external environment on the power supply device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a power supply device provided in an embodiment of the present utility model;

[0022] Figure 2A schematic structural diagram of another power supply device provided in an embodiment of the present utility model;

[0023] Figure 3 A schematic structural diagram of a first voltage conversion module provided in an embodiment of the present utility model;

[0024] Figure 4 A schematic structural diagram of a second voltage conversion module provided in an embodiment of the present utility model;

[0025] Figure 5 A schematic structural diagram of a relay provided in an embodiment of the present utility model;

[0026] Figure 6 A schematic structural diagram of a drive unit provided in an embodiment of the present utility model;

[0027] Figure 7 A schematic structural diagram of another power supply device provided in an embodiment of the present utility model;

[0028] Figure 8 A schematic structural diagram of a detection module provided in an embodiment of the present utility model;

[0029] Figure 9 A schematic structural diagram of another power supply device provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0031] The utility model provides a power supply device, which is arranged in a data acquisition instrument. When the data acquisition instrument is in communication connection with a flow meter, the power supply device can supply power to the flow meter. Figure 1 This is a schematic diagram of the structure of a power supply device provided by an embodiment of the present utility model. Figure 1As shown, the power supply device includes a control module 110, at least two voltage conversion modules 120 and a gate switch module 130; the enable output terminal ENO of the control module 110 is connected to the enable input terminal ENI of the voltage conversion module 120, and the control module 110 is used to control the enable state of the voltage conversion module 120; the output terminal OUT of each voltage conversion module 120 is connected to a fixed terminal K1 of the gate switch module 130, the active terminal P of the gate switch module 130 serves as the output terminal of the power supply device, and the control terminal S of the gate switch module 130 is connected to the gate output terminal X of the control module 110; the control module 110 is also used to select the active terminal P of the gate switch module 130 and a fixed terminal K1.

[0032] Specifically, the voltage conversion module 120 is used to convert the voltage of the input power supply and output a specific voltage. Different voltage conversion modules 120 can output different voltages. For example, Figure 1 exemplarily shows that the power supply device includes two voltage conversion modules 120. One of the voltage conversion modules 120 can output a 5V voltage, and the other voltage conversion module 120 can output a 12V voltage.

[0033] The gate switch module 130 may include at least one group of gate ports, each group of gate ports including an active terminal P and at least two fixed terminals K1. The control terminal S of the gate switch module 130 is connected to the gate output terminal X of the control module 110. The gate control signal output by the gate output terminal X of the control module 110 can control the gate switch module 130 to be in different states, causing the active terminal P of the gate switch module 130 to be connected to a fixed terminal K1. Each voltage conversion module 120 can be connected to a fixed terminal K1 of the gate switch module 130, with the active terminal P of the gate switch module 130 serving as the output terminal of the power supply device. When the control module 110 controls the active terminal P of the gate switch module 130 to be connected to the fixed terminal K1 corresponding to a voltage conversion module 120, the output terminal OUT of the voltage conversion module 120 can be connected to the active terminal P of the gate switch module 130. At the same time, the enable output terminal ENO of the control module 110 can output a valid enable signal to the enable input terminal ENI of the voltage conversion module 120, causing the voltage conversion module 120 to output a specific voltage based on the valid enable signal, which is then output through the gate switch module 130. Thus, the control module 110 can control the active terminal P of the gate switch module 130 to connect to a fixed terminal K1, and control the voltage conversion module 120 corresponding to the fixed terminal K1 to enable output of a specific voltage. This allows different voltage conversion modules 120 to provide different voltages to loads through the gate switch module 130, thereby expanding the range of uses of the power supply device. When the power supply device is used in a data acquisition instrument, the data acquisition instrument can be connected to flow meters with different voltage requirements, thereby expanding the range of uses of the data acquisition instrument. Furthermore, during the voltage switching process, the control module 110 can control the state of the gate switch module 130 and the state of the voltage conversion module 120, thereby avoiding the need to disassemble the power supply device during the voltage switching process and reducing the impact of water and oxygen in the external environment on the power supply device. For example, in some embodiments, a communication unit may be provided on the control module 110, and the communication unit may communicate with a communication module external to the power supply device to implement voltage switching control of the power supply device. For example, the communication module external to the power supply device may include a button and Bluetooth.

[0034] In addition, during the voltage switching process, the active end P of the selection switch module 130 is only connected to one fixed end K1, which prevents the output ends of different voltage conversion modules 120 from being connected to the active end P of the selection switch module 130 at the same time, avoids the risk of short circuit of different voltage conversion modules 120, and improves the reliability of the power supply device.

[0035] For example, Figure 1As shown, when the at least two voltage conversion modules 120 include a first voltage conversion module 121 and a second voltage conversion module 122, the first voltage conversion module 121 can output a first voltage, for example, 12V, when in an enabled state. The second voltage conversion module 122 can output a second voltage, for example, 5V, when in an enabled state. The output terminal OUT1 of the first voltage conversion module 121 is connected to the first fixed terminal K11 of the gate switch module 130, and the output terminal OUT2 of the second voltage conversion module 122 is connected to the second fixed terminal K12 of the gate switch module 130. When the voltage required by the flowmeter connected to the power supply device is the first voltage, the control module 110 can control the active terminal P of the gate switch module 130 to be connected to the first fixed terminal K11, and simultaneously control the first voltage conversion module 121 to be in an enabled state. This allows the first voltage conversion module 121 to output the first voltage to the output terminal of the power supply device, providing the first voltage for the correspondingly connected flowmeter. When the voltage required by the flowmeter connected to the power supply device is the second voltage, the control module 110 can control the active terminal P of the selection switch module 130 to connect to the second fixed terminal K12, and simultaneously control the second voltage conversion module 122 to be in an enabled state. This allows the second voltage conversion module 122 to output the second voltage to the output terminal of the power supply device, providing the second voltage to the corresponding connected flowmeter. This allows the power supply device to power different types of flowmeters, expanding the range of uses of the power supply device and, in turn, the range of uses of the data acquisition instrument.

[0036] The technical solution of this embodiment controls the active end of the gating switch module to be connected to different fixed ends through a control module, and at the same time controls the voltage conversion module corresponding to the fixed end connected to the active end to be in an enabled state, so that different voltage conversion modules can supply power to the load connected to the power supply device. In this way, the power supply device can provide power of different voltages to different loads, thereby increasing the scope of use of the power supply device. When the power supply device is applied to a data acquisition instrument, the data acquisition instrument can be connected to flow meters with different voltage requirements, thereby increasing the scope of use of the data acquisition instrument. During the voltage switching process, the active end of the gating switch module is only connected to one fixed end, avoiding the output ends of different voltage conversion modules from being connected to the active end of the gating switch module at the same time, avoiding the risk of short circuit of different voltage conversion modules, and improving the reliability of the power supply device. In addition, the voltage switching process can be realized by the control module, so that the power supply device can be avoided from being disassembled during the voltage conversion process, reducing the impact of water and oxygen in the external environment on the power supply device.

[0037] Figure 2 This is a schematic diagram of the structure of another power supply device provided by an embodiment of the present utility model. Figure 3 This is a schematic diagram of the structure of a first voltage conversion module provided by an embodiment of the present utility model. Figure 4A schematic diagram of the structure of a second voltage conversion module provided in an embodiment of the present utility model is shown in FIG. Figure 5 This is a schematic diagram of the structure of a relay provided by an embodiment of the present utility model. Figure 5 exemplarily shows that the relay 131 includes two groups of pins. When the voltage conversion module 120 includes the first voltage conversion module 121 and the second voltage conversion module 122, the voltage conversion module 120 can be gated through a group of pins. Figure 6 A schematic diagram of the structure of a drive unit provided in an embodiment of the present utility model is shown in FIG. Figures 2 to 6 As shown, at least two voltage conversion modules 120 include a first voltage conversion module 121 and a second voltage conversion module 122, and the selection switch module 130 includes a relay 131 and a driving unit 132; the output end OUT1 of the first voltage conversion module 121 is connected to the first fixed pin 2 of the relay 131, the output end OUT2 of the second voltage conversion module 122 is connected to the second fixed pin 4 of the relay 131, the active pin 3 of the relay 131 serves as the output end of the power supply device, the coil drive pin of the relay 131 is connected to the output end of the driving unit 132, and the input end of the driving unit 132 is connected to the selection output end X of the control module 110; the control module 110 is used to control the drive signal output by the driving unit 132 to control the setting or resetting of the relay 131.

[0038] Specifically, the first voltage conversion module 121 and the second voltage conversion module 122 can both be voltage conversion chips, which are used to convert the input voltage and output the first voltage and the second voltage respectively. Figures 3 and 4 The enable terminal ENI1 of the first voltage conversion module 121 is connected to the first enable output terminal ENO1 of the control module 110, and the output terminal OUT1 of the first voltage conversion module 121 is connected to the first fixed pin 2 of the relay 131. When the first enable output terminal ENO1 of the control module 110 outputs a valid enable signal, the first voltage conversion module 121 can output the first voltage. The enable terminal ENI2 of the second voltage conversion module 122 is connected to the second enable output terminal ENO2 of the control module 110, and the output terminal OUT2 of the second voltage conversion module 122 is connected to the second fixed pin 4 of the relay 131. When the second enable output terminal ENO2 of the control module 110 outputs a valid enable signal, the second voltage conversion module 122 can output the second voltage.

[0039] Each fixed pin of relay 131 can serve as a fixed terminal K1 of gate switch module 130. Specifically, the first fixed pin serves as the first fixed terminal K11, and the second fixed pin serves as the second fixed terminal K12. The output terminal OUT1 of the first voltage conversion module 121 is connected to the first fixed pin, i.e., the output terminal OUT1 of the first voltage conversion module 121 is connected to the first fixed terminal K11; the output terminal OUT2 of the second voltage conversion module 122 is connected to the second fixed pin, i.e., the output terminal OUT2 of the second voltage conversion module 122 is connected to the second fixed terminal K12. The active pin of relay 131 serves as the output terminal of the power supply device. The coil drive pin of relay 131 is connected to the output terminal of drive unit 132. When the control module 110 controls the drive unit 132 to output different states of the drive signal, relay 131 can be controlled to be in a set or reset state, i.e., the active pin of relay 131 is connected to the first fixed pin or the second fixed pin. This allows the first voltage conversion module 121 or the second voltage conversion module 122 to supply power to the load of the power supply device, allowing the power supply device to power different loads and expanding the range of uses of the power supply device. For example, Figures 2 to 6 As shown, the first input terminal A of the drive unit 132 is connected to the first selection output terminal X1 of the control module 110, the second input terminal B of the drive unit 132 is connected to the second selection output terminal X2 of the control module 110, the first output terminal OA of the drive unit 132 is connected to the first coil drive pin 1 of the relay 131, and the second output terminal OB of the drive unit 132 is connected to the second coil drive pin 8 of the relay 131. Within a group of pins of the relay 131, the first fixed pin 2 of the relay 131 is connected to the output terminal OUT1 of the first voltage conversion module 121, the second fixed pin 4 of the relay 131 is connected to the output terminal OUT2 of the second voltage conversion module 122, and the active pin 3 of the relay 131 serves as the output terminal of the power supply device. Table 1 is a truth table of a drive unit provided in an embodiment of the present invention. In the initial state, the relay 131 can default to the reset state.

[0040] Table 1

[0041] A B OA OB 0 0 Z Z 0 1 L H 1 0 H L 1 1 L L

[0042] As shown in Table 1, when the first strobe output terminal X1 of the control module 110 outputs logic 0 and the second strobe output terminal X2 outputs logic 0, the logic values ​​of the signals inputted by the first input terminal A and the second input terminal B of the driving unit 132 are both 0. At this time, the signals outputted by the first output terminal OA and the second output terminal OB of the driving unit 132 are both in a high-impedance state Z, the potentials of the first coil drive pin 1 and the second coil drive pin 8 of the relay 131 are both low, and the relay 131 maintains the previous state.

[0043] When the first selection output terminal X1 of the control module 110 outputs a logic 0 and the second selection output terminal X2 outputs a logic 1, the logic value of the signal input to the first input terminal A of the driving unit 132 is 0, and the logic value of the signal input to the second input terminal B is 1. At this time, the signal output by the first output terminal OA of the driving unit 132 is a logic low L, and the signal output by the second output terminal OB is a logic high H. The potential of the first coil drive pin 1 of the relay 131 is at a low level, and the potential of the second coil drive pin 8 is at a high level. The relay 131 is in a reset state, and the active pin 3 of the relay 131 is connected to the first fixed pin 2, and the active pin 3 is disconnected from the second fixed pin 4. At the same time, the control module 110 controls the first voltage conversion module 121 to be in an enabled state, so that the first voltage output by the first voltage conversion module 121 supplies power to the load through the first fixed pin 2 and the active pin 3 of the relay 131.

[0044] When the first selection output terminal X1 of the control module 110 outputs a logic 1 and the second selection output terminal X2 outputs a logic 0, the logic value of the signal input to the first input terminal A of the driving unit 132 is 1, and the logic value of the signal input to the second input terminal B is 0. At this time, the signal output by the first output terminal OA of the driving unit 132 is a logic high (H), and the signal output by the second output terminal OB is a logic low (L). The potential of the first coil drive pin 1 of the relay 131 is high, and the potential of the second coil drive pin 8 is low. The relay 131 is in the set state, and the active pin 3 of the relay 131 is connected to the second fixed pin 4, while the active pin 3 is disconnected from the first fixed pin 2. Simultaneously, the control module 110 controls the second voltage conversion module 122 to be in the enabled state, so that the second voltage output by the second voltage conversion module 122 supplies power to the load through the second fixed pin 4 and the active pin 3 of the relay 131.

[0045] When the first selection output terminal X1 of the control module 110 outputs logic 1 and the second selection output terminal X2 outputs logic 1, the logic value of the signal input to the first input terminal A of the driving unit 132 is 1, and the logic value of the signal input to the second input terminal B is 1. At this time, the signal output by the first output terminal OA of the driving unit 132 is logic low L, and the signal output by the second output terminal OB is logic low L. The potentials of the first coil drive pin 1 and the second coil drive pin 8 of the relay 131 are both low, and the relay 131 does not operate.

[0046] In some embodiments, relay 131 is a magnetic latching relay.

[0047] Specifically, when the relay 131 is a magnetic latching relay, after the relay 131 switches between different states, the switched state can be maintained. Thus, during the power output period, the control module 110 can turn off the drive unit 132, reducing the energy consumption of the drive unit 132, thereby reducing the energy consumption of the power supply device. Exemplarily, when the relay 131 switches from the set state to the reset state, the relay 131 includes the state in which the first fixed pin 2 is connected to the active pin 3, and the control module 110 can control the first voltage conversion module 121 to be in the enabled state, so that the first voltage conversion module 121 maintains the power supply state. At the same time, the control module 110 can turn off the drive unit 132, thereby reducing the energy consumption of the drive unit 132 during the process of stable power supply of the power supply device, thereby reducing the energy consumption of the power supply device.

[0048] Figure 7 This is a schematic diagram of the structure of another power supply device provided by an embodiment of the present utility model. Figure 7 As shown, the power supply device also includes a detection module 140; the control terminal TC of the detection module 140 is connected to the detection output terminal TO of the control module 110, the input terminal IN of the detection module 140 is connected to the output terminal of the power supply device, and the output terminal TOUT of the detection module 140 is connected to the detection input terminal TI of the control module 110. The control module 110 is also used to control the detection module 140 to detect the output voltage of the power supply device after the selection switch module 130 is selected, and control the selection switch module 130 to maintain the current state when the output voltage is within a preset voltage range.

[0049] Specifically, the detection module 140 has a detection function. When the control module 110 controls the active terminal P of the gate switch module 130 to be connected to a fixed terminal K1, the voltage conversion module 120 connected to the fixed terminal K1 can output a voltage to provide power. At this time, the control module 110 can output a valid detection control signal to the detection module 140, so that the detection module 140 is enabled according to the detection control signal, detects the output voltage of the power supply device, and outputs the detection voltage to the control module 110. The control module 110 can determine whether the output voltage of the power supply device is the required voltage based on the detection voltage and a preset voltage range, thereby realizing output voltage detection of the power supply device. The preset voltage range can be set based on the voltage provided by the voltage conversion module 120. For example, when the active terminal P of the gate switch module 130 is connected to a fixed terminal K1, and the voltage provided by the voltage conversion module 120 connected to the fixed terminal K1 is 12V, the preset voltage range can fluctuate around 12V. When the voltage conversion module 120 outputs a voltage to supply power, if the detection voltage detected by the detection module 140 is within a preset voltage range, it can be determined that the voltage switching of the power supply device is successful and the voltage conversion module 120 can supply power normally, that is, the power supply device can supply power to the load normally. When the selection switch module 130 includes a magnetic latching relay and a drive unit, the control module 110 can also turn off the drive unit so that the magnetic latching relay can maintain its current state and the voltage conversion module 120 continues to supply power to the load. When the detection voltage is outside the preset range, it can be determined that the voltage switching of the power supply device has failed and the voltage conversion module 120 cannot supply power normally, that is, the power supply device may not be able to supply power to the load normally. At this time, re-switching can be performed.

[0050] Figure 8 This is a schematic diagram of the structure of a detection module provided by an embodiment of the present utility model. Figure 8 As shown, the detection module 140 includes a controllable switch unit 141 and a voltage divider unit 142; the control end of the controllable switch unit 141 is connected to the detection output end TO of the control module 110, the first end of the controllable switch unit 141 is connected to the output end of the power supply device, the second end of the controllable switch unit 141 is connected to the first end of the voltage divider unit 142, the second end of the voltage divider unit 142 is connected to the ground end GND, and the output end of the voltage divider unit 142 is connected to the detection input end TI of the control module 110.

[0051] Specifically, after the control module 110 outputs a valid detection control signal to the control terminal of the controllable switch unit 141, the controllable switch unit 141 is turned on, so that the output voltage of the power supply device is transmitted to the voltage divider unit 142 through the controllable switch unit 141. The voltage divider unit 142 divides the output voltage of the power supply device and feeds it back to the control module 110. The control module 110 converts the divided output voltage to determine the actual output voltage of the power supply device. The control module 110 then determines whether the voltage switching of the power supply device is successful based on the actual output voltage and the preset voltage range.

[0052] Continue to refer Figure 8 The controllable switch unit 141 includes a first transistor Q21 and a second transistor Q20; the base of the first transistor Q21 is connected to the detection output terminal TO of the control module 110, the collector of the first transistor Q21 is connected to the base of the second transistor Q20, the emitter of the first transistor Q21 is connected to the ground terminal GND, the collector of the second transistor Q20 is connected to the output terminal of the power supply device, and the emitter of the second transistor Q20 is connected to the first end of the voltage divider unit 142.

[0053] Specifically, Figure 8 It is exemplarily shown that the first transistor Q21 is an N-type transistor and the second transistor Q20 is a P-type transistor. At this time, the detection control signal output by the control module 110 is valid at a high level. When the detection control signal output by the control module 110 is at a high level, the first transistor Q21 is turned on, the base of the second transistor Q20 is pulled down to a low level, and the second transistor Q20 is turned on. The output voltage of the power supply device is transmitted to the voltage divider unit 142 through the second transistor Q20, and the voltage divider unit 142 divides the output voltage and outputs it to the control module 110. The control module 110 converts the output voltage after voltage division to determine the actual output voltage of the power supply device. Then, it is judged whether the voltage switching of the power supply device is successful based on the actual output voltage and the preset voltage range. Continue to refer to Figure 8 The controllable switch unit 141 further includes a current limiting resistor RT connected between the base of the first transistor Q21 and the detection output terminal TO of the control module 110 , for limiting the current provided by the detection output terminal TO of the control module 110 .

[0054] Continue to refer Figure 8The voltage dividing unit 142 includes a first voltage dividing resistor R1, a second voltage dividing resistor R2, a current limiting resistor R3 and a first capacitor C1; the first end of the first voltage dividing resistor R1 is connected to the second end of the controllable switch unit 141, the second end of the first voltage dividing resistor R1 is connected to the first end of the second voltage dividing resistor R2 and the first end of the current limiting resistor R3, the second end of the second voltage dividing resistor R2 and the second end of the first capacitor C1 are connected to the ground end GND, the second end of the current limiting resistor R3 is connected to the first end of the first capacitor C1, and serves as the output end of the voltage dividing unit 142.

[0055] Specifically, when the controllable switch unit 141 outputs the output voltage of the power supply device, the voltage across the first and second voltage-dividing resistors R1 and R2 is the output voltage of the power supply device. After the first and second voltage-dividing resistors R1 and R2 divide the output voltage of the power supply device, the voltage is filtered by the current-limiting resistor R3 and the first capacitor C1 before being output to the control module 110. The control module 110 converts the divided output voltage to determine the actual output voltage of the power supply device. The control module 110 then determines whether the voltage switching of the power supply device is successful based on the actual output voltage and the preset voltage range.

[0056] Figure 9 This is a schematic diagram of the structure of another power supply device provided by an embodiment of the present utility model. Figure 9 As shown, the power supply device further includes a power supply module 150 , which is connected to the control module 110 , the voltage conversion module 120 and the gate switch module 130 , and is used to supply power to the control module 110 , the voltage conversion module 120 and the gate switch module 130 .

[0057] Specifically, the power supply module 150 can provide multiple voltage power supplies to respectively power the control module 110 , the voltage conversion module 120 and the gate switch module 130 , so that the control module 110 , the voltage conversion module 120 and the gate switch module 130 can operate normally.

[0058] Continue to refer Figure 9 The power supply module 150 includes a power supply unit 151 and a voltage conversion unit 152; the power supply unit 151 is connected to the voltage conversion module 120 and is used to supply power to the voltage conversion module 120; the voltage conversion unit 152 is connected to the power supply unit 151, and the control module 110 and the selection switch module 130 are connected to the voltage conversion unit 152. The voltage conversion unit 152 is used to perform voltage conversion on the voltage output by the power supply unit 151 and supply power to the control module 110 and the selection switch module 130.

[0059] Specifically, the input voltage required by the voltage conversion module 120 is relatively high, and the voltage provided by the power supply unit 151 can match the voltage required by the voltage conversion module 120, directly powering the voltage conversion module 120. When the input voltages required by at least two voltage conversion modules 120 are different, the power supply unit 151 can include multiple voltage power supplies to provide different voltage power supplies to different voltage conversion modules 120. The input voltage required by the control module 110 and the gate switch module 130 is relatively low. The voltage conversion unit 152 can step down the voltage provided by the power supply unit 151 so that the voltage output by the voltage conversion unit 152 matches the voltage required by the control module 110 and the gate switch module 130, thereby powering the control module 110 and the gate switch module 130. For example, when the control module 110 and the gate switch module 130 include chips, the voltage required by the control module 110 and the gate switch module 130 can be 3.3V.

[0060] The present invention also provides a data acquisition device. The data acquisition device may include the power supply device provided in any embodiment of the present invention. Because the data acquisition device includes the power supply device provided in any embodiment of the present invention, it has the same beneficial effects as the power supply device provided in any embodiment of the present invention, and will not be further described here.

[0061] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A power supply device, characterized in that: The power supply device is arranged in a data acquisition instrument, and includes a control module, at least two voltage conversion modules and a gate switch module; The enable output terminal of the control module is connected to the enable input terminal of the voltage conversion module, and the control module is used to control the enable state of the voltage conversion module; the output terminal of each voltage conversion module is connected to a fixed terminal of the selection switch module, the active terminal of the selection switch module serves as the output terminal of the power supply device, and the control terminal of the selection switch module is connected to the selection output terminal of the control module; the control module is also used to select the active terminal of the selection switch module and one of the fixed terminals.

2. The power supply device according to claim 1, wherein: At least two of the voltage conversion modules include a first voltage conversion module and a second voltage conversion module, and the gate switch module includes a relay and a drive unit; The output end of the first voltage conversion module is connected to the first fixed pin of the relay, the output end of the second voltage conversion module is connected to the second fixed pin of the relay, the active pin of the relay serves as the output end of the power supply device, the coil drive pin of the relay is connected to the output end of the drive unit, and the input end of the drive unit is connected to the selection output end of the control module; the control module is used to control the drive signal output by the drive unit to control the setting or resetting of the relay.

3. The power supply device according to claim 2, wherein: The relay is a magnetic latching relay.

4. The power supply device according to any one of claims 1 to 3, characterized in that: It also includes a detection module; the control end of the detection module is connected to the detection output end of the control module, the input end of the detection module is connected to the output end of the power supply device, and the output end of the detection module is connected to the detection input end of the control module. The control module is also used to control the detection module to detect the output voltage of the power supply device after the selection switch module is selected, and control the selection switch module to maintain the current state when the output voltage is within a preset voltage range.

5. The power supply device according to claim 4, characterized in that: The detection module includes a controllable switch unit and a voltage divider unit; the control end of the controllable switch unit is connected to the detection output end of the control module, the first end of the controllable switch unit is connected to the output end of the power supply device, the second end of the controllable switch unit is connected to the first end of the voltage divider unit, the second end of the voltage divider unit is connected to the ground end, and the output end of the voltage divider unit is connected to the detection input end of the control module.

6. The power supply device according to claim 5, characterized in that The controllable switch unit includes a first transistor and a second transistor; The base of the first transistor is connected to the detection output end of the control module, the collector of the first transistor is connected to the base of the second transistor, the emitter of the first transistor is connected to the ground end, the collector of the second transistor is connected to the output end of the power supply device, and the emitter of the second transistor is connected to the first end of the voltage divider unit.

7. The power supply device according to claim 5, characterized in that: The voltage dividing unit includes a first voltage dividing resistor, a second voltage dividing resistor, a current limiting resistor and a first capacitor; The first end of the first voltage-dividing resistor is connected to the second end of the controllable switch unit, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor and the first end of the current-limiting resistor, the second end of the second voltage-dividing resistor and the second end of the first capacitor are connected to the ground end, and the second end of the current-limiting resistor is connected to the first end of the first capacitor and serves as the output end of the voltage-dividing unit.

8. The power supply device according to claim 1, wherein: It also includes a power supply module, which is connected to the control module, the voltage conversion module and the gate switch module and is used to supply power to the control module, the voltage conversion module and the gate switch module.

9. The power supply device according to claim 8, characterized in that The power supply module includes a power supply unit and a voltage conversion unit; The power supply unit is connected to the voltage conversion module and is used to supply power to the voltage conversion module; the voltage conversion unit is connected to the power supply unit, and the control module and the selection switch module are connected to the voltage conversion unit, and the voltage conversion unit is used to perform voltage conversion on the voltage output by the power supply unit and then supply power to the control module and the selection switch module.

10. A data acquisition instrument, characterized in that: The invention comprises the power supply device according to any one of claims 1 to 9.

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