Portable multifunctional manual operator

Abstract

The utility model discloses a portable multifunctional manual operator, relates to the technical field of circuit protection, and mainly aims to provide a power supply short-circuit protection function for an instrument debugging tool. The main technical scheme of the utility model is as follows: the portable multifunctional manual operator comprises a functional circuit module; wherein the positive electrode end of the functional circuit module is sequentially connected to the PMOS transistor, the first anti-reverse connection diode, the first self-recovery fuse and the positive electrode wiring terminal through a first wire, and the negative electrode end of the functional circuit module is sequentially connected to the NMOS transistor, the second self-recovery fuse and the negative electrode wiring terminal through a second wire.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection, in particular to a portable multifunctional hand-held controller. Background Art

[0002] Instrument debugging tools are widely used in scenarios such as instrument equipment maintenance and debugging. Currently, the debugging tools designed by manufacturers are all large in size and heavy in weight (the overall size is 205x110x52mm, and the weight is about 0.9kg), which makes them inconvenient to carry.

[0003] Moreover, due to the over-bloated functions of existing instrument debugging tools, the operation is cumbersome when using functions. When using common functions, it is necessary to select and enter the sub-menu multiple times. The output port of the debugging tool does not have the function of preventing mis-input. Once an external voltage is connected, the debugging tool will be damaged. The DC24V voltage source output does not have a short-circuit protection function. If the output is short-circuited due to an operation error, the internal circuit of the debugging tool will be burned out, resulting in the debugging tool being unable to be repaired and only the whole machine can be replaced, increasing the production cost.

[0004] In addition, most products on the market currently use a simple method of connecting a fuse in series in the circuit to achieve the short-circuit protection function, and it is inconvenient to replace the fuse. Summary of the Utility Model

[0005] In view of this, an embodiment of the utility model provides a portable multifunctional hand-held controller, and the main purpose is to provide a power supply short-circuit protection function for an instrument debugging tool.

[0006] To achieve the above purpose, the utility model mainly provides the following technical solutions:

[0007] An embodiment of the utility model provides a portable multifunctional hand-held controller, which includes: a functional circuit module;

[0008] Wherein, the positive extreme of the functional circuit module is sequentially connected to a PMOS transistor, a first reverse connection protection diode, a first self-resetting fuse and a positive terminal through a first wire, and the negative extreme of the functional circuit module is sequentially connected to an NMOS transistor, a second self-resetting fuse and a negative terminal through a second wire.

[0009] The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

[0010] Optionally, it further includes a second reverse connection protection diode, the anode of the second reverse connection protection diode is connected to the second wire, and the cathode of the second reverse connection protection diode is connected to the first wire.

[0011] Optionally, it further includes a first surge protection diode and a second surge protection diode, and the first surge protection diode and the second surge protection diode are connected in parallel between the first wire and the second wire.

[0012] Optionally, it further includes a gas discharge tube, and both ends of the gas discharge tube are respectively connected to the first wire and the second wire.

[0013] Optionally, the functional circuit module includes a DC24V / 0 - 20mA current signal generator, a DC24V output control circuit, a 0 - 5V / 0 - 10V voltage signal generator, and a current sampling and measuring circuit. The DC24V / 0 - 20mA current signal generator, the DC24V output control circuit, and the 0 - 5V / 0 - 10V voltage signal generator are respectively connected to the input end of the current sampling and measuring circuit. The first output end of the sampling and measuring circuit is connected to the drain of the PMOS transistor, and the source of the PMOS transistor is connected to the first reverse connection prevention diode.

[0014] Optionally, it further includes an MCU controller and a DAC chip, and the MCU controller, the DAC chip, and the DC24V / 0 - 20mA current signal generator are connected in sequence.

[0015] Optionally, the MCU controller is respectively electrically connected to the DC24V / 0 - 20mA current signal generator, the DC24V output control circuit, the 0 - 5V / 0 - 10V voltage signal generator, the gate of the PMOS transistor, and the gate of the NMOS transistor through the IIC bus.

[0016] Optionally, it further includes a power supply, a power - on / off control circuit, an LDO voltage - regulating circuit, and a Boost boost - up circuit. The positive pole of the power supply is electrically connected to the input end of the power - on / off control circuit. The output end of the power - on / off control circuit is respectively electrically connected to the LDO voltage - regulating circuit and the Boost boost - up circuit. The LDO voltage - regulating circuit is respectively electrically connected to the MCU controller and the current sampling and measuring circuit. The Boost boost - up circuit is respectively electrically connected to the DC24V / 0 - 20mA current signal generator, the DC24V output control circuit, and the 0 - 5V / 0 - 10V voltage signal generator. The negative pole of the power supply is connected to the source of the NMOS transistor, and the drain of the NMOS transistor is connected to the second self - recovering fuse.

[0017] Optionally, it further includes a three - position dial switch, and the three - position dial switch is respectively connected to the power - on / off control circuit and the MCU controller.

[0018] By means of the above - mentioned technical solution, the utility model has at least the following advantages:

[0019] When using this hand-held controller, directly connect the positive terminal and the negative terminal to the target device.

[0020] Add a PMOS transistor at the output terminal behind the functional circuit module and an NMOS transistor at the input terminal to prevent external voltage and current from flowing into the functional circuit module when the hand-held controller is in a no-output state. Isolation is carried out here. Only when the functional circuit is in use and the PMOS transistor and the NMOS transistor are turned on can voltage and current signals be output externally.

[0021] The positive terminal of the functional circuit module is connected to the first reverse-connection protection diode, which is used for reverse-connection protection to prevent the external input voltage and current from affecting the internal circuit. The first reverse-connection protection diode can block reverse current;

[0022] The characteristic of the self-resetting fuse is that the greater the current flowing through it, the greater its resistance value. It can play a current-limiting role when passing through a large current, and the fuse will blow after being under a large current for a long time.

[0023] Through the above settings, a power supply short-circuit protection function can be provided for the functional circuit module. Brief Description of the Drawings

[0024] Figure 1 A detailed circuit principle diagram of a portable multi-functional hand-held controller provided by an embodiment of the present invention;

[0025] Figure 2 A schematic circuit principle diagram of a portable multi-functional hand-held controller provided by an embodiment of the present invention;

[0026] Figure 3 A front view of a portable multi-functional hand-held controller provided by an embodiment of the present invention;

[0027] Figure 4 A side view of a portable multi-functional hand-held controller provided by an embodiment of the present invention;

[0028] Figure 5 A top view of a portable multi-functional hand-held controller provided by an embodiment of the present invention;

[0029] Figure 6 A bottom view of a portable multi-functional hand-held controller provided by an embodiment of the present invention.

[0030] The reference numerals in the drawings of the specification include: PMOS transistor 1, first reverse connection prevention diode 2, first self - resetting fuse 3, positive terminal 4, NMOS transistor 5, second self - resetting fuse 6, negative terminal 7, second reverse connection prevention diode 8, first surge protection diode 9, second surge protection diode 10, gas discharge tube 11, DC24V / 0 - 20mA current signal generator 12, DC24V output control circuit 13, 0 - 5V / 0 - 10V voltage signal generator 14, current sampling and measuring circuit 15, MCU controller 16, DAC chip 17, power supply 18, power - on / off control circuit 19, LDO voltage - stabilizing circuit 20, Boost boost circuit 21, three - position dial switch 22, display screen 23, charging interface 24. Detailed implementation manners

[0031] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific implementation manners, structures, features, and their effects of the application according to the present utility model. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0032] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0033] As Figure 1 and Figure 2 shown, a portable multi - functional hand - held controller provided by an embodiment of the present utility model includes: a functional circuit module;

[0034] Among them, the positive terminal of the functional circuit module is sequentially connected to the PMOS transistor 1, the first reverse connection prevention diode 2, the first self - resetting fuse 3, and the positive terminal 4 through a first wire, and the negative terminal of the functional circuit module is sequentially connected to the NMOS transistor 5, the second self - resetting fuse 6, and the negative terminal 7 through a second wire.

[0035] The beneficial effects of the portable multi - functional hand - held controller are as follows:

[0036] When using this hand - held controller, the positive terminal 4 and the negative terminal 7 are directly connected to the target device.

[0037] A PMOS transistor 1 is added to the positive terminal of the functional circuit module, and an NMOS transistor 5 is added to the negative terminal to prevent external voltage and current from flowing into the functional circuit module when the hand - held controller is in a no - output state, for isolation here. Only when the functional circuit is in use and the PMOS transistor 1 and the NMOS transistor 5 are turned on can voltage and current signals be output externally.

[0038] The positive terminal of the functional circuit module is connected to the first reverse connection protection diode 2, which is an anti-reverse connection protection for preventing the external voltage input current from affecting the internal circuit. The first reverse connection protection diode 2 can block the reverse current;

[0039] The characteristic of the self-resetting fuse is that the greater the current flowing through it, the greater its resistance. It can play a current limiting role when passing through a large current, and the fuse will blow after being under a large current for a long time.

[0040] Through the above settings, a power supply short circuit protection function can be provided for the functional circuit module.

[0041] Such as Figure 1 and Figure 2 As shown in

[0042] In this embodiment, specifically, a second reverse connection protection diode 8 is provided between the first wire and the second wire, which is an anti-reverse connection protection for preventing the external reverse voltage input from affecting the internal circuit. When there is an external reverse voltage input, the negative terminal connection 7, the second reverse connection protection diode 8 and the positive terminal connection 4 form a loop, and the reverse voltage can be eliminated in this loop.

[0043] Such as Figure 1 and Figure 2 As shown in

[0044] In this embodiment, specifically, the first surge protection diode 9 and the second surge protection diode 10 are connected in parallel between the first wire and the second wire to achieve double insurance, prevent the loss of protection after one of them fails, and can achieve the impact protection of the external input high voltage and large current on the port and the short circuit protection of the output port. The surge protection diode responds and conducts quickly, and the voltage between the first wire and the second wire is clamped at a safe voltage.

[0045] Such as Figure 1 and Figure 2 As shown in

[0046] In this embodiment, specifically, the gas discharge tube 11 absorbs the first-stage large current, and the self-resetting fuse is responsible for eliminating the parasitic coupling generated by the current change.

[0047] Such asFigure 1 and Figure 2 As shown in Figure 2 , in the specific implementation, the functional circuit module further includes a DC24V / 0-20mA current signal generator 12, a DC24V output control circuit 13, a 0-5V / 0-10V voltage signal generator 14, and a current sampling and measuring circuit 15. The DC24V / 0-20mA current signal generator 12, the DC24V output control circuit 13, and the 0-5V / 0-10V voltage signal generator 14 are respectively connected to the input end of the current sampling and measuring circuit 15. The first output end of the current sampling and measuring circuit 15 is connected to the drain of the PMOS transistor 1, and the source of the PMOS transistor 1 is connected to the first reverse connection prevention diode 2.

[0048] In this implementation, specifically, the current sampling and measuring circuit 15 is used for loop current detection, can be used for calibrating the output current of the DC24V / 0-20mA current signal generator 12 circuit, can be used for current measurement of the DC24V output control circuit 13, and can convert the current value sent by the 0-5V / 0-10V voltage signal generator 14 into engineering quantity for real-time display.

[0049] As Figure 1 and Figure 2 As shown in Figure 2 , in the specific implementation, it further includes an MCU controller 16 and a DAC chip 17. The MCU controller 16, the DAC chip 17, and the DC24V / 0-20mA current signal generator 12 are connected in sequence.

[0050] In this implementation, specifically, the DC24V / 0-20mA current signal generator 12 realizes 0-2V voltage output by the MCU controlling the DAC chip 17 through the IIC bus. The reference voltage used by the DAC chip 17 is the 3V voltage provided by the DC24V / 0-20mA current signal generator 12 to improve the accuracy of the output voltage of the DAC chip 17.

[0051] As Figure 1 and Figure 2 As shown in Figure 2 , in the specific implementation, the MCU controller 16 is respectively electrically connected to the DC24V / 0-20mA current signal generator 12, the DC24V output control circuit 13, the 0-5V / 0-10V voltage signal generator 14, the gate of the PMOS transistor 1, and the gate of the NMOS transistor 5 through the IIC bus.

[0052] In this embodiment, specifically, the MCU controller 16 is electrically connected to the DC24V / 0-20mA current signal generator 12, the DC24V output control circuit 13, and the 0-5V / 0-10V voltage signal generator 14 through the IIC bus respectively, for controlling the output enabling of the three;

[0053] The MCU controller 16 is connected to the gate of the PMOS transistor 1 and the gate of the NMOS transistor 5 through the IIC bus respectively, facilitating the control of the conduction and cutoff of the MOS transistors.

[0054] Such as Figure 1 and Figure 2 As shown in

[0055] In this embodiment, specifically, after the output voltage of the power supply 18 passes through the switch control circuit, it generates 3.3V voltage for the LDO voltage regulator circuit 20 and 24V voltage for the Boost boost circuit 21, and the output electrical energy is used to supply power to other parts of the handheld controller.

[0056] Such as Figure 1 and Figure 2 As shown in

[0057] In this embodiment, specifically, the control of the power-on and power-off control circuit 19 is first controlled by the three-position dial switch 22 to power on. After the MCU controller 16 starts up for 2 seconds, the MCU controls the power-on and power-off control circuit 19 to remain in the open state; the power-off is realized by software control. When the power-off command is triggered, the MCU controls the power-on and power-off control circuit 19 to remain in the closed state to cut off the power supply; after power-on, the MCU detects the key states of the three-position dial switch 22 to realize the corresponding control functions.

[0058] Such as Figures 3 to 6As shown in the figure, specifically, the positive pole of the output port of this hand-held controller is connected to the red wire, and the negative pole is connected to the black wire, which is directly connected to the target device during use. A 0.91-inch OLED display screen 23 is used for menu and function display. The function selection and basic operations are operated by a three-position dial switch 22, which has functions of up scrolling, down scrolling, confirmation, power on, and power off. Output function 1 is a DC24V / 0-20MA current signal output, with functions such as current step output, manual and automatic step output, cyclic output, open circuit detection, etc.; output function 2 is a DC24V voltage source output, with a load-carrying capacity of DC24V / 100MA and a 150MA fuse blow protection function; output function 3 is a 0-5V or 0-10V voltage signal output, with functions such as voltage step output, manual and automatic step output, cyclic output, etc. Function 4 has an internal loop current measurement circuit added, which can realize automatic correction of loop current output, detection of loop current in the DC24V voltage source power supply circuit, and can convert the detected current value into engineering quantity for real-time display (manually set the range and unit). An external reserved Type-C charging interface 24, a charging indicator light, and an 8.4V / 2000MA lithium battery are built-in for power supply, with functions such as battery power detection, overcharge and over-discharge protection of the battery, low battery prompt for charging and forced shutdown.

[0059] Specifically, the external dimensions of the hand-held controller (95.1x43.28x18.6mm) are smaller and more compact, the weight is 110g, which is light and thin and easy to carry. The output port is added with a short-circuit protection circuit and a circuit to prevent mis-input, and the function menu is simple and clear, and the operation is easy.

[0060] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.

Claims

1. A portable multi-functional hand-held device, characterized in that, Including: Functional circuit module; Wherein, the positive terminal of the functional circuit module is sequentially connected to a PMOS transistor, a first reverse connection protection diode, a first self - restoring fuse, and a positive terminal connection terminal through a first wire, and the negative terminal of the functional circuit module is sequentially connected to an NMOS transistor, a second self - restoring fuse, and a negative terminal connection terminal through a second wire.

2. The portable multi - functional hand - held controller according to claim 1, wherein, It further includes a second reverse connection protection diode, the anode of the second reverse connection protection diode is connected to the second wire, and the cathode of the second reverse connection protection diode is connected to the first wire.

3. The portable multi - functional hand - held controller according to claim 1, wherein, It further includes a first surge protection diode and a second surge protection diode, and the first surge protection diode and the second surge protection diode are connected in parallel between the first wire and the second wire.

4. The portable multi - functional hand - held controller according to claim 1, wherein, It further includes a gas discharge tube, and both ends of the gas discharge tube are respectively connected to the first wire and the second wire.

5. The portable multi - functional hand - held controller according to any one of claims 1 to 4, wherein, The functional circuit module includes a DC24V / 0 - 20mA current signal generator, a DC24V output control circuit, a 0 - 5V / 0 - 10V voltage signal generator, and a current sampling and measuring circuit. The DC24V / 0 - 20mA current signal generator, the DC24V output control circuit, and the 0 - 5V / 0 - 10V voltage signal generator are respectively connected to the input end of the current sampling and measuring circuit. The first output end of the sampling and measuring circuit is connected to the drain of the PMOS transistor, and the source of the PMOS transistor is connected to the first reverse connection protection diode.

6. The portable multi - functional hand - held controller according to claim 5, wherein, It further includes an MCU controller and a DAC chip, and the MCU controller, the DAC chip, and the DC24V / 0 - 20mA current signal generator are sequentially connected.

7. The portable multi - functional hand - held controller according to claim 6, wherein, The MCU controller is electrically connected to the DC24V / 0 - 20mA current signal generator, the DC24V output control circuit, the 0 - 5V / 0 - 10V voltage signal generator, the gate of the PMOS transistor, and the gate of the NMOS transistor respectively through an IIC bus.

8. The portable multi - functional hand - held controller according to claim 6, wherein, It also includes a power supply, a power-on / off control circuit, an LDO voltage regulator circuit, and a Boost boost circuit. The positive pole of the power supply is electrically connected to the input end of the power-on / off control circuit. The output end of the power-on / off control circuit is electrically connected to the LDO voltage regulator circuit and the Boost boost circuit respectively. The LDO voltage regulator circuit is electrically connected to the MCU controller and the current sampling and measurement circuit respectively. The Boost boost circuit is electrically connected to the DC24V / 0-20mA current signal generator, the DC24V output control circuit, and the 0-5V / 0-10V voltage signal generator respectively. The negative pole of the power supply is connected to the source electrode of the NMOS transistor, and the drain electrode of the NMOS transistor is connected to the second self-resetting fuse.

9. The portable multifunctional hand-held controller according to claim 8, wherein it further includes a three-position dial switch, and the three-position dial switch is connected to the power-on / off control circuit and the MCU controller respectively.

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