AC / DC voltage transmitter device

Abstract

The utility model relates to an AC / DC voltage transmitter device, which comprises an outer shell formed by buckling an upper shell and a lower shell up and down, a circuit board is arranged in the upper shell, and an analog quantity signal output terminal, a power supply input terminal, a first voltage signal input terminal and a second voltage signal input terminal are arranged on the circuit board. The analog quantity signal output terminal and the power supply input terminal are arranged at the left part of the circuit board; the first voltage signal input terminal and the second voltage signal input terminal are arranged at the right part of the circuit board; a dial switch is arranged at the top of the circuit board; the circuit board is also provided with a voltage acquisition module, and a voltage signal is converted into a voltage signal through the voltage acquisition module and is transmitted to the voltage signal conditioning circuit. The utility model simultaneously supports the measurement of direct-current or alternating-current voltage, can change the input signal acquisition mode through the dial switch, and can change the measuring range according to different voltage magnitudes.

Description

Technical Field

[0001] This utility model relates to the field of voltage isolation measurement technology, and in particular to an AC / DC voltage transmitter device. Background Technology

[0002] A voltage transmitter is a measuring device that converts measured AC voltage, DC voltage, or pulse voltage into a linearly proportional DC voltage or DC current output and isolates the analog signal. Currently, most voltage transmitters suffer from the following drawbacks:

[0003] (1) Most voltage transmitters can only measure DC or AC voltage and are not compatible with DC and AC scenarios;

[0004] (2) Most voltage transmitters have a fixed range, and users cannot adjust the range for different voltage levels;

[0005] (3) Most voltage transmitters have a fixed output signal mode, and users cannot adjust the output signal mode of the transmitter according to the receiving equipment of the downstream. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an AC / DC voltage transmitter device to solve the above problems.

[0007] The purpose of this utility model is achieved as follows:

[0008] An AC / DC voltage transmitter device includes an outer shell composed of an upper shell and a lower shell that are snapped together. A circuit board is housed inside the upper shell. The circuit board has analog signal output terminals, a power input terminal, a first voltage signal input terminal, and a second voltage signal input terminal. The analog signal output terminals and the power input terminal are located on the left side of the circuit board, while the first voltage signal input terminal and the second voltage signal input terminal are located on the right side of the circuit board. A DIP switch is located on the top of the circuit board. An openable sliding cover is provided on the top surface of the upper shell, the position of which corresponds to the position of the DIP switch below. Opening the sliding cover on the upper shell reveals the DIP switch on the circuit board.

[0009] The circuit board is also equipped with a voltage acquisition module, which is located to the left of the first voltage signal input terminal and the second voltage signal input terminal; the voltage signal is converted into a voltage signal by the voltage acquisition module and transmitted to the voltage signal conditioning circuit;

[0010] The circuit board also includes a DC / DC conversion circuit, a microcontroller power supply circuit, an analog output circuit, a voltage acquisition module power supply circuit, a voltage acquisition and signal conditioning circuit, a microcontroller circuit, and a DIP switch circuit. The power supply circuit is connected to the voltage signal conditioning circuit, the voltage acquisition circuit is connected to the voltage signal conditioning circuit, the voltage acquisition circuit acquires voltage signals through the voltage acquisition module, the voltage signal conditioning circuit is connected to the microcontroller circuit, the DIP switch circuit is connected to the microcontroller circuit, and the microcontroller circuit is connected to the analog output circuit, which includes a voltage analog output circuit and a current analog output circuit.

[0011] The power supply circuit of the voltage acquisition module includes chip IC5, transformer T3, chip U13 and chip IC6. Chip IC5 is connected to the input terminal of transformer T3, the output terminal of transformer T3 is connected to chip U13, chip U13 is connected to a TVS diode D21, capacitors C14 and C15 in parallel, capacitor C15 is connected to chip IC6, chip IC6 is connected in series with resistor R38, and chip IC6 is connected to a Zener diode D15, capacitors C12 and C13 in parallel.

[0012] The voltage acquisition and signal conditioning circuit includes chip U3, TVS diode D1, and diode U12. TVS diode D1 and diode U12 are connected in parallel. One end of TVS diode D1 is also connected to resistors R7, R8, R10, and R11 in series, and the other end of TVS diode D1 is also connected to resistors R22, R24, R25, and R29 in series. One end of diode U12 is connected to resistors R12 and R13, and the other end is connected to resistors R17 and R34. Resistor R12 is connected to capacitor C6 and pin 2 of chip U3, and resistor R17 is connected to capacitor C7 and pin 3 of chip U3. Pin 7 of chip U3 is connected to resistors R4 and R5 in series, and pin 6 of chip U3 is connected to resistors R36 and R37 in series. R15 is set between resistors R4 and R36. Resistor R5 is connected to capacitor C3, and resistor R37 is connected to capacitor C9.

[0013] Furthermore, the voltage analog output circuit includes an optocoupler U6, a chip U8, and a chip U4. The optocoupler U6 isolates and transmits the PWM wave signal, the chip U8 performs waveform shaping on the PWM wave signal, and the chip U4 outputs a voltage signal of corresponding magnitude according to the duty cycle of the PWM wave. One side of the optocoupler U6 is connected to the chip U8 via a resistor R28. The resistor R28 is connected to the Zener diode D3 and the resistor R26. The resistors R26, R28, and the Zener diode D3 perform amplitude regulation on the isolated PWM wave signal. The chip U8 is connected to the chip U4.

[0014] Furthermore, in the voltage analog output circuit, one pin of chip U4 is connected to capacitor C41 and inductor L6 respectively. Inductor L6 is connected to capacitor C45, diode D13 and TVS diode D12 in parallel. Capacitors C41, C45 and inductor L6 serve to filter out high-frequency interference signals, while diode D13 and TVS diode D12 serve to clamp.

[0015] Furthermore, the analog current output circuit includes an optocoupler U9, a chip U10, and a chip U7. The optocoupler U9 isolates and transmits the PWM wave signal. One side of the optocoupler U6 is connected to the chip U10 via a resistor R33. The resistor R33 is connected to the Zener diode D11 and the resistor R30. The resistors R30, R33, and the Zener diode D11 perform amplitude regulation on the isolated PWM wave signal. The chip U10 performs waveform trimming on the PWM wave signal. The chip U10 is connected to the chip U7. The chip U7 is connected to the source S of the MOSFET Q1. The gate G of the MOSFET Q1 is connected to the Zener diode D14, the resistor R35, and the capacitor C53. The chip U7, the MOSFET Q1, the Zener diode D14, the resistor R35, and the capacitor C53 constitute a current output circuit, which outputs a voltage signal of corresponding magnitude according to the duty cycle of the PWM wave.

[0016] Furthermore, in the analog current output circuit, the drain D of MOSFET Q1 is connected to capacitor C54 and diode D16, diode D16 is connected to capacitor C55 and inductor L5, and inductor L5 is connected to capacitor C57, diode D17 and TVS diode D18. Capacitors C54, C55, C57 and inductor L5 serve to filter out high-frequency interference signals, diode D16 serves to prevent reverse connection, and diode D17 and TVS diode D18 serve to clamp the circuit.

[0017] Furthermore, the power supply circuit, i.e., the DC / DC conversion circuit, is a DC 9~36V input power supply circuit, including a power chip IC2, a varistor RV1, a TVS diode D7, an inductor L1, an inductor L3, and a capacitor C8 to provide EMC protection for the power input. The power chip IC2 is connected in parallel with capacitors C33, C34, and C35, which serve as filters. Capacitor C34 is connected in parallel with the varistor RV1, capacitor C8, and TVS diode D7. A fuse PT2 is provided between the varistor RV1 and capacitor C8 for current limiting protection. One end of capacitor C8 is connected to one end of TVS diode D7 through inductor L1 and diode D4, with diode D4 providing reverse connection protection. The other end of capacitor C8 is connected to the other end of TVS diode D7 through inductor L3. The power chip IC2 achieves the conversion of the output DC 5V.

[0018] Furthermore, the microcontroller power supply circuit includes chip IC3, transformer T1, and chip U11. Chip IC3 is connected to transformer T1, which inverts the 5V power supply into AC power. This AC power is then isolated and converted by transformer T1. Pin 4 of transformer T1 is connected to diode D8, and pin 6 is connected to diode D5. Diodes D8 and D5 are connected in parallel with TVS diode D2, capacitor C29, resistor R20, and capacitor C1. Capacitor C1 is connected to the input terminal of chip U11, and the output terminal of chip U11 is connected in parallel with TVS diode D23, capacitors C30 and C32. Diodes D5 and D8 provide rectification, TVS diode D2 provides clamping, and capacitors C29 and C1 provide filtering. Chip U11 performs voltage conversion, converting 6V to 5V. TVS diode D23 provides clamping, and capacitors C30 and C32 provide filtering.

[0019] Furthermore, the analog output circuit power supply includes a chip IC4, which is connected to a transformer T2. IC4 inverts the 5V power supply into AC power, which is then isolated and converted by the transformer T2. The transformer T2 is connected to diodes D9, D10, D19, and D20 connected in series. Diodes D9, D10, D19, and D20 are connected in parallel to a TVS diode D22 and a capacitor C37. Diodes D9, D10, D19, and D20 act as rectifiers, converting the AC voltage into DC 24V. The TVS diode D22 acts as a clamping diode, and the capacitor C37 acts as a filter.

[0020] Furthermore, the microcontroller circuit includes a chip IC1, an indicator light circuit, a temperature measurement circuit, interface J5, and interface J6. The indicator light circuit includes an indicator light LED1, resistors R6 and R9, and the temperature measurement circuit includes a resistor R14, PT1, a capacitor C16, and a chip U1A. The chip IC1 calculates the current sampling signal and can calculate the magnitude of DC current and AC current respectively. Interface J5 is the program programming port of the chip IC1, and interface J6 is the communication interface of the chip IC1.

[0021] Furthermore, the DIP switch circuit includes a DIP switch SW1, a chip U5, and a chip U6. One pin of the DIP switch SW1 is grounded, and the other pin is connected to pull-up resistors R16, R1, R40, R41, R42, R43, and R44, respectively. Chips U5 and U6 serve to prevent static electricity from the DIP switch.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This utility model provides an AC / DC voltage transmitter device that supports the measurement of both DC and AC voltages. Users can change the input signal acquisition mode via a DIP switch; users can change the measurement range for different voltage magnitudes via a DIP switch; and users can adjust the output signal mode of the voltage transmitter according to the downstream acquisition equipment via a DIP switch. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the principle of this utility model.

[0026] Figure 3 This is a circuit diagram of the DC / DC conversion circuit of this utility model.

[0027] Figure 4 This is the circuit diagram of the microcontroller power supply circuit of this utility model.

[0028] Figure 5 This is a circuit diagram of the analog output circuit power supply of this utility model.

[0029] Figure 6 This is a circuit diagram of the power supply circuit of the voltage acquisition module of this utility model.

[0030] Figure 7 This is a circuit diagram of the voltage acquisition and signal conditioning circuit of this utility model.

[0031] Figure 8 This is the circuit schematic diagram of the microcontroller circuit of this utility model.

[0032] Figure 9 This is a circuit diagram of the DIP switch circuit of this utility model.

[0033] Figure 10 This is a circuit diagram of the voltage analog output circuit of this utility model.

[0034] Figure 11 This is a circuit diagram of the analog current output circuit of this utility model.

[0035] in:

[0036] 1. Upper housing; 2. Analog signal output terminal; 3. Power input terminal; 4. Circuit board; 5. Lower housing; 6. Sliding cover; 7. DIP switch; 8. First voltage signal input terminal; 9. Second voltage signal input terminal; 10. Voltage acquisition module; 11. Locking component. Detailed Implementation

[0037] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of this utility model, but are merely possible implementations of the technical solution of this utility model. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example 1

[0038] See Figures 1-11 , Figure 1 A schematic diagram of the structure of this utility model has been drawn. As shown in the figure, this utility model relates to an AC / DC voltage transmitter device, which includes an outer shell composed of an upper shell 1 and a lower shell 5 that are snapped together. A circuit board 4 is provided inside the upper shell 1. The circuit board 4 is provided with an analog signal output terminal 2, a power input terminal 3, a first voltage signal input terminal 8, and a second voltage signal input terminal 9. The analog signal output terminal 2 and the power input terminal 3 are located on the left side of the circuit board 4, and the first voltage signal input terminal 8 and the second voltage signal input terminal 9 are located on the right side of the circuit board 4. A DIP switch 7 is provided on the top of the circuit board 4.

[0039] The top surface of the upper housing 1 is provided with an openable sliding cover 6. The position of the sliding cover 6 corresponds to the position of the lower DIP switch 7. By opening the sliding cover 6 on the upper housing 1, the DIP switch 7 on the circuit board 2 can be exposed.

[0040] The circuit board 4 is also provided with a voltage acquisition module 10, which is located to the left of the first voltage signal input terminal 8 and the second voltage signal input terminal 9. The voltage signal is converted into a voltage signal by the voltage acquisition module 10 and transmitted to the voltage signal conditioning circuit. The chip on the circuit board 4 can set different ranges and analog signal output modes of the voltage transmitter by detecting the status of the DIP switch 7.

[0041] The bottom of the lower housing 5 is provided with a locking element 11.

[0042] See Figure 2 , Figure 2This is a schematic diagram of the principle of this utility model. As shown in the figure, the circuit board 4 is further provided with a DC / DC conversion circuit, a microcontroller power supply circuit, an analog output circuit, a voltage acquisition module power supply circuit, a voltage acquisition and signal conditioning circuit, a microcontroller circuit, and a DIP switch circuit. The power supply circuit is connected to the voltage signal conditioning circuit, the voltage acquisition circuit is connected to the voltage signal conditioning circuit, the voltage acquisition circuit acquires voltage signals through the voltage acquisition module, the voltage signal conditioning circuit is connected to the microcontroller circuit, the DIP switch circuit is connected to the microcontroller circuit, and the microcontroller circuit is connected to the analog output circuit, which includes a voltage analog output circuit and a current analog output circuit.

[0043] The power supply circuit on circuit board 4 steps down the input power and regulates it to the voltage required by the voltage transmitter. The analog output circuit on circuit board 4 converts the voltage signal into a corresponding analog output signal based on its magnitude, and finally transmits it externally through analog signal output terminal 2. The voltage signal is converted into a voltage signal by the voltage acquisition module 10 and transmitted to the voltage signal conditioning circuit. The chip on circuit board 4 can set different ranges and analog signal output modes for the voltage transmitter by detecting the status of the DIP switch 7.

[0044] See Figure 3 , Figure 3 This is a circuit diagram of the DC / DC conversion circuit of this utility model. As shown in the figure, the power supply circuit, i.e., the DC / DC conversion circuit, is a DC 9~36V input power supply circuit, including a power chip IC2, a varistor RV1, a TVS diode D7, an inductor L1, an inductor L3, and a capacitor C8 to form EMC protection for the power input. The power chip IC2 is connected in parallel with capacitors C33, C34, and C35, which act as filters. Capacitor C34 is connected in parallel with the varistor RV1, capacitor C8, and TVS diode D7. A fuse PT2 is provided between the varistor RV1 and capacitor C8 for current limiting protection. One end of capacitor C8 is connected to one end of TVS diode D7 through inductor L1 and diode D4, with diode D4 acting as a reverse connection protection. The other end of capacitor C8 is connected to the other end of TVS diode D7 through inductor L3. The power chip IC2 realizes the conversion of the output DC 5V.

[0045] See Figure 4 , Figure 4This is a circuit diagram of the microcontroller power supply circuit of this utility model. As shown in the figure, the microcontroller power supply circuit includes chip IC3, transformer T1, and chip U11. Chip IC3 is connected to transformer T1, and IC3 inverts the 5V power supply into AC power. The AC power is then isolated and converted by transformer T1. Pin 4 of transformer T1 is connected to diode D8, and pin 6 of transformer T1 is connected to diode D5. Diodes D8 and D5 are connected in parallel with TVS diode D2, capacitor C29, resistor R20, and capacitor C1. Capacitor C1 is connected to the input terminal of chip U11, and the output terminal of chip U11 is connected in parallel with TVS diode D23, capacitors C30 and C32. Diodes D5 and D8 perform rectification, TVS diode D2 performs clamping, and capacitors C29 and C1 perform filtering. Chip U11 performs voltage conversion, converting 6V to 5V. TVS diode D23 performs clamping, and capacitors C30 and C32 perform filtering.

[0046] See Figure 5 , Figure 5 This is a circuit diagram of the analog output circuit power supply of this utility model. As shown in the figure, the analog output circuit power supply includes a chip IC4. IC4 is connected to a transformer T2. IC4 inverts the 5V power supply into AC power, which is then isolated and converted by the transformer T2. The transformer T2 is connected to diodes D9, D10, D19, and D20 connected in series. Diodes D9, D10, D19, and D20 are connected in parallel to a TVS diode D22 and a capacitor C37. Diodes D9, D10, D19, and D20 rectify the AC voltage to DC 24V. The TVS diode D22 acts as a clamping diode, and the capacitor C37 acts as a filter.

[0047] See Figure 6 , Figure 6 This is a circuit diagram of the power supply circuit for the voltage acquisition module of this utility model. As shown in the figure, the power supply circuit for the voltage acquisition module includes chip IC5, transformer T3, chip U13, and chip IC6. Chip IC5 is connected to the input terminal of transformer T3, and the output terminal of transformer T3 is connected to chip U13. Chip U13 is connected in parallel with TVS diode D21, capacitors C14 and C15, capacitor C15 is connected to chip IC6, chip IC6 is connected in series with resistor R38, and chip IC6 is connected in parallel with Zener diode D15, capacitors C12 and C13.

[0048] Chip IC5 inverts the 5V power supply into AC power, and then performs isolation conversion through transformer T3. Chip U13 rectifies the isolated and converted voltage to 6V. TVS diode D21 acts as a clamping device, and capacitors C14 and C15 act as filters. Chip IC6 regulates the 6V voltage to the 5V power supply required by the voltage acquisition module. Zener diode D15 acts as a voltage regulator, and capacitors C12 and C13 act as filters.

[0049] See Figure 7 , Figure 7 This is a circuit diagram of the voltage acquisition and signal conditioning circuit of this utility model. As shown in the figure, the voltage acquisition and signal conditioning circuit includes chip U3, TVS diode D1 and diode U12. TVS diode D1 and diode U12 are connected in parallel. One end of TVS diode D1 is also connected to resistors R7, R8, R10 and R11 in series, and the other end of TVS diode D1 is also connected to resistors R22, R24, R25 and R29 in series. One end of diode U12 is connected to resistors R12 and R13, and the other end is connected to resistors R17 and R34. Resistor R12 is connected to capacitor C6 and pin 2 of chip U3, and resistor R17 is connected to capacitor C7 and pin 3 of chip U3.

[0050] Pin 7 of chip U3 is connected to resistors R4 and R5 in series, pin 6 of chip U3 is connected to resistors R36 and R37 in series, resistor R15 is set between resistors R4 and R36, resistor R5 is connected to capacitor C3, and resistor R37 is connected to capacitor C9.

[0051] Resistors R7, R8, R10, R11, R22, R24, R25, and R29 are voltage divider resistors that step down the input voltage. TVS diode D1 and diode U12 act as clamping resistors. Resistors R13 and R17 are sampling resistors, and resistors R12, R34, and capacitors C6 and C7 act as filters. Chip U3 isolates and transmits the sampled voltage. Resistors R4, R15, and R36 act as voltage dividers, and resistors R5, R37, and capacitors C3 and C9 act as filters.

[0052] See Figure 8 , Figure 8 This is a circuit diagram of the microcontroller circuit of this utility model. As shown in the figure, the microcontroller circuit includes a chip IC1, an indicator light circuit, a temperature measurement circuit, interface J5, and interface J6. The indicator light circuit includes an indicator light LED1, resistors R6 and R9. The temperature measurement circuit includes a resistor R14, PT1, a capacitor C16, and a chip U1A. Chip IC1 calculates the current sampling signal and can calculate the magnitude of DC current and AC current respectively. Interface J5 is the program programming port of chip IC1, and interface J6 is the communication interface of chip IC1.

[0053] See Figure 9 , Figure 9 This is a circuit diagram of the DIP switch circuit of this utility model. As shown in the figure, the DIP switch circuit includes a DIP switch SW1, chip U5 and chip U6. One pin of the DIP switch SW1 is grounded, and the other pin is connected to pull-up resistors R16, R1, R40, R41, R42, R43 and R44 respectively. Chips U5 and U6 serve to prevent static electricity from the DIP switch.

[0054] See Figure 10 , Figure 10 This is a circuit diagram of the analog voltage output circuit of this utility model. As shown in the figure, the analog voltage output circuit includes an optocoupler U6, a chip U8, and a chip U4. The optocoupler U6 isolates and transmits the PWM wave signal, the chip U8 performs waveform trimming on the PWM wave signal, and the chip U4 outputs a voltage signal of corresponding magnitude according to the duty cycle of the PWM wave. One side of the optocoupler U6 is connected to the chip U8 through a resistor R28. The resistor R28 is connected to the Zener diode D3 and the resistor R26. The resistors R26, R28, and the Zener diode D3 perform amplitude regulation on the isolated PWM wave signal. The chip U8 is connected to the chip U4. One pin of the chip U4 is connected to the capacitor C41 and the inductor L6. The inductor L6 is connected to the parallel capacitor C45, the diode D13, and the TVS diode D12. The capacitors C41, C45, and the inductor L6 filter out high-frequency interference signals, and the diode D13 and the TVS diode D12 perform clamping functions.

[0055] See Figure 11 , Figure 11 This is a circuit diagram of the analog current output circuit of this utility model. As shown in the figure, the analog current output circuit includes an optocoupler U9, a chip U10, and a chip U7. The optocoupler U9 isolates and transmits the PWM wave signal. One side of the optocoupler U6 is connected to the chip U10 through a resistor R33. The resistor R33 is connected to the Zener diode D11 and a resistor R30. Resistors R30, R33, and the Zener diode D11 perform amplitude regulation on the isolated PWM wave signal. The chip U10 performs waveform trimming on the PWM wave signal. Chip U10 is connected to chip U7. Chip U7 is connected to the source S of the MOSFET Q1. The gate G of the MOSFET Q1 is connected to the Zener diode D14, a resistor R35, and a resistor R7. The circuit consists of capacitor C53, chip U7, MOSFET Q1, Zener diode D14, resistor R35, and capacitor C53. It outputs a voltage signal of corresponding magnitude according to the duty cycle of the PWM wave. The drain D of MOSFET Q1 is connected to capacitor C54 and diode D16. Diode D16 is connected to capacitor C55 and inductor L5. Inductor L5 is connected to capacitor C57, diode D17, and TVS diode D18. Capacitors C54, C55, C57, and inductor L5 filter out high-frequency interference signals. Diode D16 is for reverse connection protection. Diode D17 and TVS diode D18 are for clamping.

[0056] Working principle:

[0057] This utility model relates to an AC / DC voltage transmitter device, which consists of a voltage acquisition module, a voltage signal conditioning circuit, and an analog output circuit, all installed together in the upper and lower housings. It can measure DC or AC signals, and the input signal acquisition mode and output signal mode can be changed by a DIP switch.

[0058] The installation method is as follows:

[0059] Terminals 2, 3, 8, and 9, and voltage acquisition module 10 are soldered onto circuit board 4. Circuit board 4 is installed into lower housing 5. Upper housing 1 and lower housing 5 are then connected by snap-fit. Circuit board 4 is installed in upper housing 1 and lower housing 5. Finally, locking piece 11 is installed into the bottom of lower housing 5. The DIP switch 7 on circuit board 4 can be exposed by opening the sliding cover 6 on upper housing 1.

[0060] Terminal 3 is the power input terminal of the voltage transmitter. The power circuit on circuit board 4 steps down the input power and regulates it to the voltage required by the voltage transmitter. Terminal 2 is the output terminal of the analog signal. The analog output circuit on circuit board 4 converts the voltage signal into a corresponding analog output signal according to the magnitude of the voltage signal, and finally transmits it to the outside through terminal 2. Terminals 8 and 9 are the input terminals of the voltage signal. The voltage signal is converted into a voltage signal by the voltage acquisition module 10 and transmitted to the voltage signal conditioning circuit. The chip on circuit board 4 can set different ranges and analog signal output modes of the voltage transmitter by detecting the status of the DIP switch 7.

[0061] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. An AC / DC voltage transmitter device, characterized in that: The device includes an outer shell consisting of an upper shell (1) and a lower shell (5) that are snapped together. The upper shell (1) contains a circuit board (4). The circuit board (4) has an analog signal output terminal (2), a power input terminal (3), a first voltage signal input terminal (8), and a second voltage signal input terminal (9). The analog signal output terminal (2) and the power input terminal (3) are located on the left side of the circuit board (4), and the first voltage signal input terminal (8) and the second voltage signal input terminal (9) are located on the right side of the circuit board (4). A DIP switch (7) is located on the top of the circuit board (4). The top surface of the upper shell (1) has an openable sliding cover (6). The position of the sliding cover (6) corresponds to the position of the lower DIP switch (7). By opening the sliding cover (6) on the upper shell (1), the DIP switch (7) on the circuit board (4) can be exposed. The circuit board (4) is also provided with a voltage acquisition module (10), which is located to the left of the first voltage signal input terminal (8) and the second voltage signal input terminal (9); the voltage signal is converted into a voltage signal by the voltage acquisition module (10) and transmitted to the voltage signal conditioning circuit; The circuit board (4) is also provided with a DC / DC conversion circuit, a microcontroller power supply circuit, an analog output circuit, a voltage acquisition module power supply circuit, a voltage acquisition and signal conditioning circuit, a microcontroller circuit and a DIP switch circuit. The power supply circuit is connected to the voltage signal conditioning circuit, the voltage acquisition circuit is connected to the voltage signal conditioning circuit, the voltage acquisition circuit acquires voltage signals through the voltage acquisition module, the voltage signal conditioning circuit is connected to the microcontroller circuit, the DIP switch circuit is connected to the microcontroller circuit, the microcontroller circuit is connected to the analog output circuit, and the analog output circuit includes a voltage analog output circuit and a current analog output circuit. The power supply circuit of the voltage acquisition module includes chip IC5, transformer T3, chip U13 and chip IC6. Chip IC5 is connected to the input terminal of transformer T3, the output terminal of transformer T3 is connected to chip U13, chip U13 is connected to a TVS diode D21, capacitors C14 and C15 in parallel, capacitor C15 is connected to chip IC6, chip IC6 is connected in series with resistor R38, and chip IC6 is connected to a Zener diode D15, capacitors C12 and C13 in parallel. The voltage acquisition and signal conditioning circuit includes chip U3, TVS diode D1, and diode U12. TVS diode D1 and diode U12 are connected in parallel. One end of TVS diode D1 is also connected to resistors R7, R8, R10, and R11 in series, and the other end of TVS diode D1 is also connected to resistors R22, R24, R25, and R29 in series. One end of diode U12 is connected to resistors R12 and R13, and the other end is connected to resistors R17 and R34. Resistor R12 is connected to capacitor C6 and the second pin of chip U3, and resistor R17 is connected to capacitor C7 and the third pin of chip U3. The seventh pin of chip U3 is connected to resistors R4 and R5 in series, and the sixth pin of chip U3 is connected to resistors R36 and R37 in series. Resistor R4 and resistor R36 are connected by resistor R15. Resistor R5 is connected to capacitor C3, and resistor R37 is connected to capacitor C9.

2. The AC / DC voltage transmitter device according to claim 1, characterized in that: The analog voltage output circuit includes an optocoupler U6, a chip U8, and a chip U4. The optocoupler U6 isolates and transmits the PWM wave signal, the chip U8 modifies the waveform of the PWM wave signal, and the chip U4 outputs a voltage signal of the corresponding magnitude according to the duty cycle of the PWM wave. One side of the optocoupler U6 is connected to the chip U8 via a resistor R28. The resistor R28 is connected to the Zener diode D3 and the resistor R26. The resistors R26, R28, and the Zener diode D3 perform amplitude regulation on the isolated PWM wave signal. The chip U8 is connected to the chip U4.

3. The AC / DC voltage transmitter device according to claim 2, characterized in that: In the voltage analog output circuit, one pin of chip U4 is connected to capacitor C41 and inductor L6 respectively. Inductor L6 is connected in parallel to capacitor C45, diode D13 and TVS diode D12. Capacitors C41, C45 and inductor L6 serve to filter out high-frequency interference signals, while diode D13 and TVS diode D12 serve to clamp the signal.

4. The AC / DC voltage transmitter device according to claim 1, characterized in that: The analog current output circuit includes an optocoupler U9, a chip U10, and a chip U7. Optocoupler U9 isolates and transmits the PWM wave signal. One side of optocoupler U6 is connected to chip U10 via resistor R33. Resistor R33 is connected to Zener diode D11 and resistor R30. Resistors R30, R33, and Zener diode D11 provide amplitude regulation for the isolated PWM wave signal. Chip U10 performs waveform trimming on the PWM wave signal. Chip U10 is connected to chip U7. Chip U7 is connected to the source S of MOSFET Q1. The gate G of MOSFET Q1 is connected to Zener diode D14, resistor R35, and capacitor C53. Chip U7, MOSFET Q1, Zener diode D14, resistor R35, and capacitor C53 constitute a current output circuit that outputs a voltage signal of corresponding magnitude according to the duty cycle of the PWM wave.

5. The AC / DC voltage transmitter device according to claim 4, characterized in that: In the analog current output circuit, the drain D of MOSFET Q1 is connected to capacitor C54 and diode D16. Diode D16 is connected to capacitor C55 and inductor L5. Inductor L5 is connected to capacitor C57, diode D17 and TVS diode D18. Capacitors C54, C55, C57 and inductor L5 filter out high-frequency interference signals. Diode D16 is for reverse connection protection. Diode D17 and TVS diode D18 are for clamping.

6. The AC / DC voltage transmitter device according to claim 1, characterized in that: The power supply circuit, also known as the DC / DC conversion circuit, is a DC 9~36V input power supply circuit. It includes a power chip IC2, a varistor RV1, a TVS diode D7, inductors L1 and L3, and a capacitor C8 to provide EMC protection for the power input. The power chip IC2 is connected in parallel with capacitors C33, C34, and C35, which act as filters. Capacitor C34 is connected in parallel with the varistor RV1, capacitor C8, and TVS diode D7. A fuse PT2 is connected between the varistor RV1 and capacitor C8 for current limiting protection. One end of capacitor C8 is connected to one end of TVS diode D7 via inductor L1 and diode D4, with diode D4 providing reverse connection protection. The other end of capacitor C8 is connected to the other end of TVS diode D7 via inductor L3. The power chip IC2 converts the output to DC 5V.

7. The AC / DC voltage transmitter device according to claim 6, characterized in that: The microcontroller power supply circuit includes chip IC3, transformer T1, and chip U11. Chip IC3 is connected to transformer T1, which inverts the 5V power supply into AC power. The AC power is then isolated and converted by transformer T1. Pin 4 of transformer T1 is connected to diode D8, and pin 6 is connected to diode D5. Diodes D8 and D5 are connected in parallel with TVS diode D2, capacitor C29, resistor R20, and capacitor C1. Capacitor C1 is connected to the input terminal of chip U11, and the output terminal of chip U11 is connected in parallel with TVS diode D23, capacitors C30 and C32. Diodes D5 and D8 provide rectification, TVS diode D2 provides clamping, and capacitors C29 and C1 provide filtering. Chip U11 provides voltage conversion, converting 6V to 5V. TVS diode D23 provides clamping, and capacitors C30 and C32 provide filtering.

8. The AC / DC voltage transmitter device according to claim 1, characterized in that: The analog output circuit power supply includes chip IC4, which is connected to transformer T2. IC4 inverts the 5V power supply into AC power, which is then isolated and converted by transformer T2. Transformer T2 connects diodes D9, D10, D19, and D20 in series. Diodes D9, D10, D19, and D20 are connected in parallel to TVS diode D22 and capacitor C37. Diodes D9, D10, D19, and D20 rectify the AC voltage to DC 24V, TVS diode D22 acts as a clamping element, and capacitor C37 acts as a filter.

9. The AC / DC voltage transmitter device according to claim 1, characterized in that: The microcontroller circuit includes a chip IC1, an indicator light circuit, a temperature measurement circuit, interface J5, and interface J6. The indicator light circuit includes an indicator light LED1, resistors R6 and R9, and the temperature measurement circuit includes a resistor R14, PT1, a capacitor C16, and a chip U1A. The chip IC1 calculates the current sampling signal and can calculate the magnitude of DC current and AC current respectively. Interface J5 is the program programming port of the chip IC1, and interface J6 is the communication interface of the chip IC1.

10. The AC / DC voltage transmitter device according to claim 1, characterized in that: The DIP switch circuit includes a DIP switch SW1, a chip U5, and a chip U6. One pin of the DIP switch SW1 is grounded, and the other pin is connected to pull-up resistors R16, R1, R40, R41, R42, R43, and R44, respectively. Chips U5 and U6 serve to prevent static electricity from the DIP switch.

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