CN215681906U - Power supply circuit, remote controller and engineering machinery based on power-down protection - Google Patents
Power supply circuit, remote controller and engineering machinery based on power-down protection Download PDFInfo
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Abstract
The utility model provides a power supply circuit based on power failure protection, a remote controller and engineering machinery, wherein the power supply circuit comprises: the main circuit is arranged between an external power supply and the power supply module and comprises a one-way driving control module and an energy storage module; the unidirectional driving control module comprises an NMOS (N-channel metal oxide semiconductor) tube, the drain electrode of the NMOS tube is connected with the output end of an external power supply, and the source electrode of the NMOS tube is connected with the input end of the power supply module; one end of the energy storage module is connected with the input end of the power supply module, the other end of the energy storage module is grounded, and the energy storage module is used for storing electric energy so as to provide the electric energy for the power supply module when an external power supply is powered off. According to the utility model, the NMOS tube is arranged on the one-way driving control module, the current backflow can be prevented, the voltage loss of the NMOS tube is low after the NMOS tube is conducted, the energy storage module is arranged to store electric energy, and the power supply is provided for the power supply module when the external power supply is powered off, so that the continuous power supply of the power supply module is ensured, and meanwhile, the circuit structure is simple, and the cost is low.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to a power supply circuit based on power failure protection, a remote controller and engineering machinery.
Background
Based on the consideration of improving the construction efficiency and reducing the probability of safety accidents, the construction of engineering vehicles is mostly controlled remotely through a remote control system at present, for example, the rotation, lifting, feeding and the like of a boom of a pump truck are remotely controlled through a remote controller. However, due to the reasons of process, material, vibration and the like, the contact between the battery of the remote controller and the electrode is poor, and instant power failure is easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power supply circuit based on power failure protection, a remote controller and engineering machinery, which are used for solving the defect that construction efficiency is influenced due to instant power failure of the power supply circuit in the prior art.
The utility model provides a power supply circuit based on power failure protection, which comprises:
the main circuit is arranged between an external power supply and the power supply module and comprises a one-way driving control module and an energy storage module;
the unidirectional drive control module comprises an NMOS tube, the drain electrode of the NMOS tube is connected with the output end of the external power supply, and the source electrode of the NMOS tube is connected with the input end of the power supply module; one end of the energy storage module is connected with the input end of the power supply module, the other end of the energy storage module is grounded, and the energy storage module is used for storing electric energy so as to provide the electric energy for the power supply module when the external power supply is powered off.
According to the power supply circuit based on the power failure protection, the main circuit further comprises a soft start control module; the soft start control module is arranged between the unidirectional drive control module and the energy storage module;
the soft start control module comprises a PMOS (P-channel metal oxide semiconductor) tube, the drain electrode of the PMOS tube is connected with the source electrode of the NMOS tube, the source electrode of the PMOS tube is connected with the input end of the power module, and the PMOS tube is used for starting at a preset rate in the process of charging the energy storage module.
The power supply circuit based on the power failure protection further comprises an auxiliary circuit, wherein the auxiliary circuit is connected with the main circuit in parallel;
the auxiliary circuit comprises a detection module and a storage module, wherein the detection module is used for detecting real-time voltage information of the main circuit, and the storage module is used for recording and storing the real-time voltage information and/or voltage abnormal information.
According to the power supply circuit based on the power failure protection, the detection module comprises a level conversion unit and a Schmidt shaping unit, and the storage module comprises an MCU;
the level conversion unit is used for acquiring a real-time voltage signal of the main circuit and converting the real-time voltage signal to obtain a conversion signal; the Schmitt shaping unit is used for sending a trigger signal to the MCU when detecting that the real-time voltage of the main circuit is smaller than a threshold value; the MCU is used for identifying the real-time voltage information based on the conversion signal and recording and storing the real-time voltage information and/or voltage abnormity information based on the trigger signal.
According to the power supply circuit based on the power failure protection, the detection module further comprises a clock unit;
the clock unit comprises a real-time clock and is used for sending a clock signal corresponding to the real-time voltage signal to the MCU, so that the MCU records and stores time information corresponding to the real-time voltage signal.
According to the power supply circuit based on the power failure protection, the auxiliary circuit further comprises a display module;
the display module is connected with the storage module and is used for displaying real-time voltage information and/or voltage abnormity information of the main circuit.
According to the power supply circuit based on the power failure protection, the display module comprises an early warning unit, and the early warning unit is used for giving early warning prompt when the real-time voltage of the main circuit is abnormal.
According to the power supply circuit based on the power failure protection, the energy storage module comprises a farad capacitor.
The present invention also provides a remote controller, comprising: the power supply circuit based on the power failure protection is described above.
The present invention also provides an engineering machine comprising:
the remote controller is used for sending a remote control instruction to the execution mechanism and comprises the power supply circuit based on the power failure protection; the executing mechanism is used for executing corresponding actions according to the remote control commands.
According to the power supply circuit based on power-down protection, the remote controller and the engineering machinery, the NMOS tube is arranged on the one-way driving control module, so that the current backflow can be prevented, the voltage loss of the NMOS tube after the NMOS tube is conducted is low, and the energy storage module is arranged to store electric energy, so that power is provided for the power supply module when an external power supply is powered down, and the continuous power supply of the power supply module is ensured. In addition, the power supply circuit is simple in structure and low in cost.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a power supply circuit based on power down protection provided by the present invention;
FIG. 2 is a detailed circuit diagram of the main circuit provided by the present invention;
FIG. 3 is a specific circuit diagram of the detection module provided in the present invention
Reference numerals:
100: a main circuit; 110: a unidirectional drive control module; 120: an energy storage module;
130: a soft start control module; 111: an NMOS tube; 131: a PMOS tube;
200: an auxiliary circuit; 210: a detection module; 220: a storage module;
230: a display module; 211: a level conversion unit; 212: a Schmitt shaping unit;
213: a clock unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Based on the consideration of improving the construction efficiency and reducing the probability of safety accidents, the construction of engineering vehicles is mostly controlled remotely through a remote control system at present, for example, the rotation, lifting, feeding and the like of a boom of a pump truck are remotely controlled through a remote controller. However, due to the reasons of process, material, vibration and the like, the contact between the battery of the remote controller and the electrode is poor, and instant power failure is easy to occur.
The power supply circuit in the traditional scheme comprises a power input module, an isolation energy storage module, a filtering energy storage module, a voltage conversion module and an output module which are electrically connected in sequence, wherein the filtering energy storage module comprises a common-mode inductor and more than one capacitor which can supply power for a certain time length, so that the purpose of supplying power immediately when the power supply falls is achieved, and meanwhile, the current is prevented from flowing backwards by arranging a diode. However, the power supply circuit comprises 5 modules, the circuit is complex, and the diode is adopted to prevent the current from flowing backwards, so that the loss is high. In addition, current can cause the impact to the circuit in the power supply process, shortens component life-span.
Therefore, the utility model provides a power supply circuit based on power failure protection. Fig. 1 is a schematic structural diagram of a power down protection-based power supply circuit provided in the present invention, and as shown in fig. 1, the power supply circuit includes a main circuit 100, where the main circuit 100 is disposed between an external power source and a power supply module, and the main circuit 100 includes a unidirectional driving control module 110 and an energy storage module 120.
The unidirectional driving control module 110 includes an NMOS tube 111, a drain of the NMOS tube 111 is connected to an output terminal of an external power supply, and a source of the NMOS tube 111 is connected to an input terminal of the power supply module, so that a current of the main circuit flows into the power supply module in a unidirectional manner, thereby preventing the current from flowing backward. In addition, the Vgs of the NMOS 111 is greater than a certain value, so that the NMOS is turned on, and is suitable for the case where the source is grounded (low-side driving), and after being turned on, an on-resistance exists, so that the current consumes energy at the resistance, and since the on-resistance of the NMOS 111 is small, the voltage loss of the NMOS 111 after being turned on can be effectively reduced (< 20 mV). The external power supply is a power supply for supplying power to the power module from the outside, and the power module can be regarded as a power supply inside a certain control system.
One end of the energy storage module 120 is connected to the input end of the power module, and the other end is grounded for storing electric energy, when the external power supply is powered down instantaneously, the power module cannot be supplied with electric energy, and then the energy storage module 120 can supply electric energy to the power module. The energy storage module 120 may be a storage battery or a farad capacitor, which is not limited in this embodiment.
Therefore, according to the power supply circuit based on power-down protection provided by the embodiment of the utility model, the NMOS tube is arranged on the unidirectional drive control module, so that the current backflow can be prevented, the voltage loss of the NMOS tube after the NMOS tube is conducted is low, and the energy storage module is arranged to store electric energy, so that power is provided for the power supply module when an external power supply is powered down, and the continuous power supply of the power supply module is ensured. In addition, the power supply circuit is simple in structure and low in cost.
Based on the above embodiment, the main circuit 100 further includes a soft start control module 130; the soft start control module 130 is arranged between the unidirectional driving control module 110 and the energy storage module 120;
the soft start control module 130 includes a PMOS transistor 131, a drain of the PMOS transistor 131 is connected to a source of the NMOS transistor 111, a source of the PMOS transistor 131 is connected to an input terminal of the power module, and the PMOS transistor 131 is configured to be turned on at a preset rate in a charging process of the energy storage module 120.
Specifically, in the process of charging the energy storage module 120 by using the external power source, if the NMOS 111 is turned on, a higher voltage is instantaneously formed at two ends of the energy storage module 120, so that a larger current is formed to impact the elements of the energy storage module 120, thereby affecting the service life of the elements.
Therefore, in the embodiment, the soft-start control module 130 is disposed between the unidirectional driving control module 110 and the energy storage module 120, and the PMOS transistor 131 is slowly turned on at a predetermined rate, so as to avoid the problem of impact on the device caused by the high voltage instantaneously formed at the two ends of the energy storage module 120. The PMOS transistor 131 is turned on when Vgs is smaller than a certain value, and the PMOS transistor 131 and the NMOS transistor 111 are arranged in a back-to-back manner.
As shown in fig. 2, the main circuit includes a unidirectional driving control module, a soft start control module, and an energy storage module, wherein the unidirectional driving control module adopts an NMOS tube, the loss is low, and the reverse flow of current is prevented, the soft start control module is used for avoiding circuit impact, prolonging the service life of the energy storage element, and the energy storage module includes a capacitor for supplying power when the power supply falls.
Based on any of the above embodiments, the power supply further comprises an auxiliary circuit 200, wherein the auxiliary circuit 200 is connected with the main circuit 100 in parallel;
the auxiliary circuit 200 includes a detection module 210 and a storage module 220, wherein the detection module 210 is used for detecting the real-time voltage information of the main circuit 100, and the storage module 220 is used for recording and storing the real-time voltage information and/or the voltage abnormality information.
Specifically, in order to timely know the voltage state of the power supply circuit and determine whether there is an abnormality, the present embodiment further provides an auxiliary circuit 200 for acquiring and recording real-time voltage information and/or voltage abnormality information (e.g., voltage abnormality event) of the main circuit 100.
The auxiliary circuit 200 includes a detection module 210, configured to detect real-time voltage information and/or voltage abnormality information (e.g., a voltage abnormality) of the main circuit 100, for example, when the real-time voltage of the main circuit 100 is smaller than a threshold, it indicates that a power failure condition may exist in the external power supply, that is, the voltage abnormality occurs, at this time, the detection module 210 may obtain the real-time voltage information of the main circuit 100, where the real-time voltage information may include a voltage value of the main circuit 100 and a time corresponding to the voltage value, which is not limited in this embodiment. In addition, since the voltage abnormal event occurs at this time, the current voltage abnormal information (such as the abnormal time, the abnormal occurrence position, etc.) can be recorded.
After acquiring the real-time voltage information and/or the voltage abnormality information of the main circuit 100, the present embodiment records and stores the real-time voltage information and/or the voltage abnormality information through the storage module 220, so as to be able to query the voltage condition and/or the voltage abnormality information of the main circuit 100 in time. The storage module 220 may adopt an MCU or an FPGA, which is not specifically limited in this embodiment.
Based on any of the above embodiments, the detection module 210 includes a level conversion unit 211 and a schmitt shaping unit 212, and the storage module 220 includes an MCU;
the level conversion unit 211 is configured to obtain a real-time voltage signal of the main circuit 100, and convert the real-time voltage signal to obtain a conversion signal; the schmitt shaping unit 212 is configured to send a trigger signal to the MCU when detecting that the real-time voltage of the main circuit 100 is less than the threshold; the MCU is used for identifying the real-time voltage information based on the conversion signal and recording and storing the real-time voltage information and/or the voltage abnormity information based on the trigger signal.
Specifically, since the MCU has a limited requirement on the value range of the received voltage signal, and the real-time voltage of the main circuit 100 may exceed the identification range of the MCU, the real-time voltage signal of the main circuit needs to be converted to obtain a voltage signal with a lower value, i.e., a converted signal. For example, the real-time voltage of the main circuit 100 is generally 6-8.4V, and the voltage value that the MCU can detect cannot exceed 2.5V, so the real-time voltage signal needs to be converted to below 2.5V by the level conversion unit 211 so that the MCU can recognize the real-time voltage information from the signal. Fig. 3 is a specific circuit diagram of the detection module.
In an actual process, in order to save the storage space of the storage module 220, it may be selected to record a voltage condition that may have an abnormality, without recording all voltages, that is, to record a voltage corresponding to a power failure that may exist in the external power supply. Therefore, when the real-time voltage of the main circuit 100 is smaller than the threshold, the schmitt shaping unit 212 generates a circuit inversion to generate a trigger signal to trigger the MCU to interrupt, and at this time, the MCU records and stores the real-time voltage information and/or the voltage abnormality information. The threshold may be set according to actual conditions, and this embodiment is not particularly limited to this.
According to any of the above embodiments, the detection module 210 further includes a clock unit 213;
the clock unit 213 includes a real-time clock, and is configured to send a clock signal corresponding to the real-time voltage signal to the MCU, so that the MCU records and stores time information corresponding to the real-time voltage signal.
Specifically, after recording the real-time voltage information of the main circuit 100, if the power-down time of the external power supply needs to be accurately located, the time corresponding to the real-time voltage needs to be recorded. Therefore, the present embodiment further provides a clock unit 213 that accurately records time information corresponding to the real-time voltage signal by the real-time clock. Wherein, the real-time clock may be an I2C real-time clock.
Based on any of the above embodiments, the MCU is an MCS-51 singlechip.
Specifically, the MCS-51 single chip is an integrated circuit chip, which is a small and perfect computer system formed by integrating functions (possibly including circuits such as a display driving circuit, a pulse width modulation circuit, an analog multiplexer, an a/D converter and the like) of a central processing unit CPU, a random access memory RAM, a read only memory ROM, various I/O ports, an interrupt system, a timer/timer and the like with data processing capacity on a silicon chip by adopting a very large scale integrated circuit technology, so that not only can real-time voltage information of the main circuit 100 be recorded and stored, but also a plurality of functional modules are integrated on the silicon chip, and the size is small.
According to any of the above embodiments, the auxiliary circuit 200 further includes a display module 230;
the display module 230 is connected to the storage module 220 and is configured to display real-time voltage information of the main circuit 100.
Specifically, in order to be able to intuitively obtain the real-time voltage information and/or the voltage abnormality information of the main circuit 100, the present embodiment further provides a display module 230 connected to the storage module 220 for displaying the real-time voltage information and/or the voltage abnormality information of the main circuit 100.
Based on any of the above embodiments, the display module 230 includes an early warning unit, and the early warning unit is configured to perform early warning prompt when the real-time voltage of the main circuit is abnormal.
Specifically, if the real-time voltage of the main circuit is abnormal, if the real-time voltage of the main circuit is smaller than a preset value, it is indicated that the external power supply may have a power failure condition, and at this time, the early warning unit performs early warning prompt. It can be understood that the early warning prompt can be performed in a sound mode or in an audible and visual alarm mode. In addition, the preset value may be the same as the threshold value in the above embodiment, or may float to a certain ratio on the basis of the threshold value, so that the fluctuation condition of the voltage in the vicinity of the threshold value can be known, which is not specifically limited in this embodiment.
The energy storage module 120 comprises a farad capacitor according to any of the above embodiments.
Specifically, farad capacitance is called as double-layer capacitor, gold capacitor and super capacitor, farad capacitance stores energy through polarized electrolyte, but does not generate chemical reaction, and the energy storage process is reversible, and the farad capacitance can be repeatedly charged and discharged for tens of thousands of times just because of the method of pulling capacitance. Farad capacitance differs from ordinary capacitance primarily by the difference in capacitance. The maximum capacity of a common capacitor is 1-4 thousands of microfarads, and the maximum capacity of a super capacitor can reach thousands of farads, so that more electric energy can be stored.
Based on any one of the above embodiments, the present invention provides a remote controller, including: the power supply circuit based on power down protection as described in any of the above embodiments.
Specifically, since the remote controller includes the power supply circuit based on power down protection according to any of the above embodiments, the remote controller has the beneficial effects of the power supply circuit based on power down protection according to the above embodiments, which is not described in detail in this embodiment.
Based on any one of the embodiments described above, the present invention provides an engineering machine, including: the remote controller is used for sending a remote control instruction to the execution mechanism and comprises the power supply circuit based on the power failure protection in any embodiment; the execution mechanism is used for executing corresponding actions according to the remote control commands.
Specifically, the engineering machinery that this embodiment provided, including actuating mechanism and remote controller, wherein the remote controller includes any one of the above-mentioned embodiments power supply circuit based on power down protection, this power supply circuit not only can prevent the electric current from flowing backward through set up the NMOS pipe on one-way drive control module, and the voltage loss of NMOS pipe after switching on is lower moreover to and store the electric energy through setting up energy storage module, thereby for power module provides the power when external power source falls the power, guarantee power module's continuous power supply. In addition, the power supply circuit is simple in structure and low in cost.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A power supply circuit based on power down protection is characterized by comprising:
the main circuit is arranged between an external power supply and the power supply module and comprises a one-way driving control module and an energy storage module;
the unidirectional drive control module comprises an NMOS tube, the drain electrode of the NMOS tube is connected with the output end of the external power supply, and the source electrode of the NMOS tube is connected with the input end of the power supply module; one end of the energy storage module is connected with the input end of the power supply module, the other end of the energy storage module is grounded, and the energy storage module is used for storing electric energy so as to provide the electric energy for the power supply module when the external power supply is powered off.
2. The power down protection based power supply circuit according to claim 1, wherein the main circuit further comprises a soft start control module; the soft start control module is arranged between the unidirectional drive control module and the energy storage module;
the soft start control module comprises a PMOS (P-channel metal oxide semiconductor) tube, the drain electrode of the PMOS tube is connected with the source electrode of the NMOS tube, the source electrode of the PMOS tube is connected with the input end of the power module, and the PMOS tube is used for starting at a preset rate in the process of charging the energy storage module.
3. The power down protection based power supply circuit according to claim 1, further comprising an auxiliary circuit connected in parallel with the main circuit;
the auxiliary circuit comprises a detection module and a storage module, wherein the detection module is used for detecting real-time voltage information of the main circuit, and the storage module is used for recording and storing the real-time voltage information and/or voltage abnormal information.
4. The power-down protection based power supply circuit according to claim 3, wherein the detection module comprises a level conversion unit and a Schmitt shaping unit, and the storage module comprises an MCU;
the level conversion unit is used for acquiring a real-time voltage signal of the main circuit and converting the real-time voltage signal to obtain a conversion signal; the Schmitt shaping unit is used for sending a trigger signal to the MCU when detecting that the real-time voltage of the main circuit is smaller than a threshold value; the MCU is used for identifying the real-time voltage information based on the conversion signal and recording and storing the real-time voltage information and/or voltage abnormity information based on the trigger signal.
5. The power-fail-protection-based power supply circuit according to claim 4, wherein the detection module further comprises a clock unit;
the clock unit comprises a real-time clock and is used for sending a clock signal corresponding to the real-time voltage signal to the MCU, so that the MCU records and stores time information corresponding to the real-time voltage signal.
6. The power-down protection based power supply circuit according to claim 3, wherein the auxiliary circuit further comprises a display module;
the display module is connected with the storage module and is used for displaying real-time voltage information and/or voltage abnormity information of the main circuit.
7. The power-fail-protection-based power supply circuit as claimed in claim 6, wherein the display module comprises an early warning unit, and the early warning unit is configured to perform early warning prompt when the real-time voltage of the main circuit is abnormal.
8. The power supply circuit based on power down protection according to any one of claims 1 to 7, wherein the energy storage module comprises a farad capacitor.
9. A remote controller comprising the power down protection based power supply circuit of any one of claims 1 to 8.
10. A work machine, comprising:
the remote controller is used for sending a remote control instruction to the execution mechanism and comprises the power supply circuit based on the power failure protection as claimed in any one of claims 1 to 8; the executing mechanism is used for executing corresponding actions according to the remote control commands.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914898A (en) * | 2023-09-14 | 2023-10-20 | 卧安科技(深圳)有限公司 | Power supply circuit and power supply method of intelligent equipment and intelligent equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914898A (en) * | 2023-09-14 | 2023-10-20 | 卧安科技(深圳)有限公司 | Power supply circuit and power supply method of intelligent equipment and intelligent equipment |
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