Voltage switching control circuit applied to laser radar charging

Abstract

The invention discloses a voltage switching control circuit applied to laser radar charging. The voltage switching control circuit comprises a voltage switching circuit and a charging channel circuit. The voltage switching circuit is connected with the charging channel circuit; wherein the voltage switching circuit is used for switching a first energy storage voltage and a second energy storage voltage according to a first input voltage; and the charging channel circuit is used for controlling the conduction channel to charge the laser radar according to the second input voltage. The first energy storage voltage or the second energy storage voltage is selected for charging through the voltage switching circuit under the action of the first input voltage, and the charging voltage can be dynamically adjusted according to the actual demand of the laser radar or the current battery state, so that the charging efficiency is optimized, other circuits or components do not need to be additionally arranged for voltage switching, and the cost is reduced. The charging cost of the laser radar is reduced, the charging time is shortened, the energy waste is reduced, and the overall energy utilization rate is improved.

Description

Technical Field

[0001] The present application relates to the field of charging control technology, and more specifically, to a voltage switching control circuit used for charging a laser radar. Background Art

[0002] As a precise measurement and perception technology, LiDAR transmits laser pulses and receives reflected signals to accurately measure the distance, shape, position and other information of objects. In these application scenarios, the reliability and performance of LiDAR directly affect the overall performance of the system. Therefore, the design and optimization of LiDAR-related circuits are particularly important.

[0003] In the existing technology, the voltage switching control circuit for lidar charging usually uses high-speed switching elements such as MOSFET (metal oxide semiconductor field effect transistor) or IGBT (insulated gate bipolar transistor), and designs an efficient charging circuit considering factors such as voltage stability, charging speed, and energy conversion efficiency.

[0004] However, the existing voltage switching control circuit for charging a laser radar has low integration and the laser adopts a common anode connection method, which results in a large number of MOS switches required to be set in the voltage switching control circuit, making the cost of the voltage switching control circuit high. Summary of the invention

[0005] In response to at least one defect or improvement need in the prior art, the present invention provides a voltage switching control circuit for laser radar charging, which is used to solve the problem in the prior art that the voltage switching control circuit has low integration and the laser adopts a common anode connection method, resulting in a large number of MOS switches required to be set in the voltage switching control circuit, which makes the cost of the voltage switching control circuit high.

[0006] To achieve the above-mentioned object, according to a first aspect of the present invention, a voltage switching control circuit for charging a laser radar is provided, comprising: a voltage switching circuit and a charging channel circuit; the voltage switching circuit and the charging channel circuit are connected;

[0007] Wherein, the voltage switching circuit is used to switch the first energy storage voltage and the second energy storage voltage according to the first input voltage;

[0008] The charging channel circuit is used to control the conduction channel to charge the laser radar according to the second input voltage.

[0009] In a possible implementation, a switch MOS tube is further included, wherein a gate of the switch MOS tube is connected to a conduction enable signal, a drain of the switch MOS tube is connected to a charging channel circuit, and a source of the switch MOS tube is grounded.

[0010] In a possible implementation, the charging channel circuit includes: a plurality of identical channel sub-loops connected in parallel.

[0011] In a possible implementation, the channel sub-loop includes a transistor PMOSn, a light-emitting diode Dn and a capacitor Cn; the gate of the transistor PMOSn is connected to the second input voltage, the drain of the transistor PMOSn is connected to the charging channel circuit, the source of the transistor PMOSn is connected to one end of the capacitor Cn, and the other end of the capacitor Cn is grounded; the positive electrode of the light-emitting diode Dn is connected to the source of the transistor PMOSn, and the negative electrode of the light-emitting diode Dn is connected to the drain of the switch MOS tube.

[0012] In a possible implementation, the voltage switching circuit includes a first voltage switching circuit and a second voltage switching circuit;

[0013] Wherein, the first voltage switching circuit is used to be turned on under the action of the first input voltage and charged with the first energy storage voltage;

[0014] The second voltage switching circuit is used to be turned on under the action of the second input voltage and charged with the second energy storage voltage.

[0015] In one possible implementation, the first voltage switching circuit includes: a transistor PMOSa and a diode a; the gate of the transistor PMOSa is connected to the first input voltage, the drain of the transistor PMOSa is connected to the first energy storage voltage, the source of the transistor PMOSa is connected to the positive electrode of the diode a, and the negative electrode of the diode a is connected to the charging channel circuit.

[0016] In one possible implementation, the second voltage switching circuit includes: a transistor PMOSb and a diode b; the gate of the transistor PMOSb is connected to the second input voltage, the drain of the transistor PMOSb is connected to the second energy storage voltage, the source of the transistor PMOSb is connected to the anode of the diode b, and the cathode of the diode b is connected to the charging channel circuit.

[0017] In a possible implementation, the transistor PMOSn is used to realize the opening or closing of the nth channel sub-loop.

[0018] In a possible implementation, the light emitting diode Dn is used to emit light when the n-th channel sub-loop is turned on, so as to display the switch state of the n-th channel sub-loop.

[0019] In a possible implementation, the capacitor Cn is used to store the charge of the nth channel sub-loop.

[0020] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0021] The present invention provides a voltage switching control circuit for charging a laser radar. The voltage switching circuit selects the first energy storage voltage or the second energy storage voltage for charging under the action of the first input voltage. The charging voltage can be dynamically adjusted according to the actual needs of the laser radar or the current battery status, thereby optimizing the charging efficiency. No additional circuits or components are required for voltage switching, which reduces the cost of charging the laser radar. The charging strategy can be flexibly adjusted according to different working scenarios or power supply conditions, increasing the adaptability and flexibility of the circuit, shortening the charging time, reducing energy waste, and improving the overall energy utilization rate. At the same time, the present invention has an independent voltage switching and charging channel control mechanism, which can reduce the safety risks caused by voltage instability or erroneous operation, and protect the laser radar and other connected equipment from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A circuit diagram of an embodiment of a voltage switching control circuit for charging a laser radar provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] The terms "first", "second", "third", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0026] See also Figure 1 , Figure 1A circuit diagram of an embodiment of a voltage switching control circuit for laser radar charging provided by the present invention. In a specific embodiment of the present invention, a voltage switching control circuit for laser radar charging is disclosed, including: a voltage switching circuit and a charging channel circuit; the voltage switching circuit and the charging channel circuit are connected;

[0027] Wherein, the voltage switching circuit is used to switch the first energy storage voltage and the second energy storage voltage according to the first input voltage;

[0028] The charging channel circuit is used to control the conduction channel to charge the laser radar according to the second input voltage.

[0029] In the above embodiment, the voltage switching circuit serves as the front end of the entire control circuit and is responsible for intelligently selecting and switching the first energy storage voltage (such as Figure 1 HVa in) or the second energy storage voltage (such as Figure 1 HVb) in the circuit is used as the charging voltage, allowing the circuit to adapt to different power supply conditions or charging requirements and optimize the charging strategy. Specifically, the voltage switching circuit may contain multiple logic judgment units and switching elements (such as transistors, MOS tubes, etc.), which ensure that they can quickly and accurately switch to the appropriate energy storage voltage after receiving the first input voltage signal through complex logical relationships and precise timing control.

[0030] The charging channel circuit is directly related to the charging process of the LiDAR. It controls the opening and closing of the conduction channel according to the second input voltage. Under the action of the second input voltage, the MOS tube in the charging channel circuit will be activated, allowing current to flow into the battery of the LiDAR through the preset charging path. In addition, the charging channel circuit can also include multiple parallel channel sub-circuits to support higher charging power or provide redundant backup functions. Each channel sub-circuit can work independently to ensure that even if some circuits fail, other circuits can continue to charge the LiDAR.

[0031] The voltage switching circuit and the charging channel circuit achieve seamless collaboration through fine connections. The output of the voltage switching circuit is directly connected to the input of the charging channel circuit to provide the required charging voltage for the charging channel circuit. At the same time, the working status of the charging channel circuit is also fed back to the voltage switching circuit (, so as to adjust the charging strategy or handle abnormal situations in real time. This close coupling relationship ensures the stability, reliability and efficiency of the entire charging process.

[0032] Compared with the prior art, the voltage switching control circuit for charging a laser radar provided in this embodiment selects the first energy storage voltage or the second energy storage voltage for charging under the action of the first input voltage through the voltage switching circuit, and can dynamically adjust the charging voltage according to the actual needs of the laser radar or the current battery status, thereby optimizing the charging efficiency. It is not necessary to set up other circuits or components for voltage switching, which reduces the cost of charging the laser radar. The charging strategy can be flexibly adjusted according to different working scenarios or power supply conditions, which increases the adaptability and flexibility of the circuit, shortens the charging time, reduces energy waste, and improves the overall energy utilization rate. At the same time, the present invention has an independent voltage switching and charging channel control mechanism, which can reduce the safety risks caused by voltage instability or erroneous operation, and protect the laser radar and other connected equipment from damage.

[0033] In some embodiments of the present invention, a switch MOS tube is further included, wherein a gate of the switch MOS tube is connected to a conduction enable signal, a drain of the switch MOS tube is connected to a charging channel circuit, and a source of the switch MOS tube is grounded.

[0034] In the above embodiment, a switch MOS tube is introduced as a control element, whose gate receives a conduction enable signal, the drain is connected to the charging channel circuit, and the source is grounded. This design allows the conduction and shutdown of the charging channel to be accurately controlled by an external signal, which enhances the controllability and safety of the circuit. When the conduction enable signal is at a high level, the MOS tube is turned on, allowing current to charge the laser radar through the charging channel circuit; when the conduction enable signal is at a low level, the MOS tube is turned off, cutting off the charging channel to prevent the current from continuing to flow, and effectively protecting the circuit and equipment safety.

[0035] In some embodiments of the present invention, the charging channel circuit includes: a plurality of identical channel sub-loops connected in parallel.

[0036] In the above embodiment, the charging channel circuit is composed of several identical channel sub-circuits. This parallel design improves the redundancy and flexibility of the charging circuit. Each channel sub-circuit can work independently. Even if one or more of the sub-circuits fail, the other sub-circuits can continue to work, ensuring the continuity and stability of the charging process. In addition, the parallel design also facilitates the adjustment of the charging power according to actual needs, and optimizes the charging efficiency by increasing or decreasing the number of channel sub-circuits.

[0037] In some embodiments of the present invention, the channel sub-loop includes a transistor PMOSn, a light-emitting diode Dn and a capacitor Cn; the gate of the transistor PMOSn is connected to the second input voltage, the drain of the transistor PMOSn is connected to the charging channel circuit, the source of the transistor PMOSn is connected to one end of the capacitor Cn, and the other end of the capacitor Cn is grounded; the positive electrode of the light-emitting diode Dn is connected to the source of the transistor PMOSn, and the negative electrode of the light-emitting diode Dn is connected to the drain of the switch MOS tube.

[0038] In the above embodiment, the transistor PMOSn is used as a switch element, and its gate receives the second input voltage to control the on-off between the drain and the source. When the transistor is turned on, the current flows into the charging channel circuit through the drain, and the source stores the charge through the capacitor Cn, and drives the light-emitting diode Dn to emit light, so as to intuitively display the switch state of the channel sub-loop. The design of the channel sub-loop not only realizes the precise control of the charging current, but also provides a convenient troubleshooting method.

[0039] In some embodiments of the present invention, the voltage switching circuit includes a first voltage switching circuit and a second voltage switching circuit;

[0040] Wherein, the first voltage switching circuit is used to be turned on under the action of the first input voltage and charged with the first energy storage voltage;

[0041] The second voltage switching circuit is used to be turned on under the action of the second input voltage and charged with the second energy storage voltage.

[0042] In the above embodiment, the voltage switching circuit is divided into a first voltage switching circuit and a second voltage switching circuit, which correspond to the switching of the first energy storage voltage and the second energy storage voltage respectively. This dual-path design increases the flexibility and adaptability of the circuit, and can select a suitable voltage for charging according to different power supply conditions or charging requirements. Each switching circuit uses a combination of transistors and diodes to achieve voltage switching and transmission by controlling the conduction state of the transistors. The diode is used to prevent the current from flowing in reverse and protect the circuit safety.

[0043] In some embodiments of the present invention, the first voltage switching circuit includes: a transistor PMOSa and a diode a; the gate of the transistor PMOSa is connected to the first input voltage, the drain of the transistor PMOSa is connected to the first energy storage voltage, the source of the transistor PMOSa is connected to the positive electrode of the diode a, and the negative electrode of the diode a is connected to the charging channel circuit.

[0044] In the above embodiment, the first voltage switching circuit realizes accurate selection and transmission of the first energy storage voltage under the drive of the first input voltage through the combination of the transistor PMOSa and the diode a.

[0045] As a voltage-controlled switching element, the gate of PMOSa receives a first input voltage. When the first input voltage reaches or exceeds the threshold voltage of PMOSa, PMOSa is turned on, allowing current to flow from its drain to its source. In this process, PMOSa plays a key role in voltage selection and switch control.

[0046] The positive electrode of diode a is connected to the source of PMOSa, and the negative electrode is connected to the charging channel circuit. The existence of diode a effectively prevents the current from flowing back from the charging channel circuit to the first voltage switching circuit, thereby protecting the components in the circuit from the impact of reverse current.

[0047] When PMOSa is turned on, the first energy storage voltage is smoothly transmitted to the charging channel circuit through diode a, providing the required charging voltage for the laser radar.

[0048] In some embodiments of the present invention, the second voltage switching circuit includes: a transistor PMOSb and a diode b; the gate of the transistor PMOSb is connected to the second input voltage, the drain of the transistor PMOSb is connected to the second energy storage voltage, the source of the transistor PMOSb is connected to the positive electrode of the diode b, and the negative electrode of the diode b is connected to the charging channel circuit.

[0049] In the above embodiment, similar to the first voltage switching circuit, the second voltage switching circuit realizes the selection and transmission of the second energy storage voltage under the control of the second input voltage through the cooperation of the transistor PMOSb and the diode b.

[0050] The gate of the transistor PMOSb receives the second input voltage, which allows the circuit to select different energy storage voltages for charging according to different input signals, thereby increasing the flexibility and adaptability of the circuit.

[0051] Although the control signals are different, the working principle of the second voltage switching circuit is the same as that of the first voltage switching circuit, and both realize voltage selection and transmission through the conduction of the transistor and the unidirectional conductivity of the diode.

[0052] In some embodiments of the present invention, the transistor PMOSn is used to realize the opening or closing of the nth channel sub-loop.

[0053] In the above embodiment, in each channel sub-loop, the transistor PMOSn plays the role of a switch, and its gate receives a signal from the charging control logic, and controls the on-off between the drain and the source according to the high and low levels of the signal, thereby realizing the opening or closing of the nth channel sub-loop.

[0054] In some embodiments of the present invention, the light emitting diode Dn is used to emit light when the n-th channel sub-circuit is turned on, so as to display the switch state of the n-th channel sub-circuit.

[0055] In the above embodiment, when PMOSn is turned on, that is, the nth channel sub-loop is turned on, the light-emitting diode Dn emits light. The intuitive visual feedback mechanism of the light-emitting diode not only facilitates users or maintenance personnel to quickly understand the working status of each channel, but also helps to promptly discover and solve potential fault problems.

[0056] In some embodiments of the present invention, the capacitor Cn is used to store the charge of the nth channel sub-loop.

[0057] In the above embodiment, during the charging process, the capacitor Cn is responsible for storing charges from the charging channel circuit. After charging is completed, these charges can be used as a backup power source to provide short-term power support for the laser radar, or to protect the circuit from instantaneous voltage fluctuations in the event of a power outage.

[0058] In summary, the present invention provides a voltage switching control circuit for laser radar charging. The voltage switching circuit selects the first energy storage voltage or the second energy storage voltage for charging under the action of the first input voltage. The charging voltage can be dynamically adjusted according to the actual needs of the laser radar or the current battery status, thereby optimizing the charging efficiency. No additional circuits or components are required for voltage switching, which reduces the cost of laser radar charging. The charging strategy can be flexibly adjusted according to different working scenarios or power supply conditions, increasing the adaptability and flexibility of the circuit, which not only shortens the charging time, but also reduces energy waste and improves the overall energy utilization rate. At the same time, the present invention has an independent voltage switching and charging channel control mechanism, which can reduce the safety risks caused by voltage instability or erroneous operation, and protect the laser radar and other connected equipment from damage.

[0059] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0060] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0061] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0062] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A voltage switching control circuit for charging a laser radar, characterized in that: include: A voltage switching circuit and a charging channel circuit; the voltage switching circuit and the charging channel circuit are connected; Wherein, the voltage switching circuit is used to switch the first energy storage voltage and the second energy storage voltage according to the first input voltage; The charging channel circuit is used to control the conduction channel to charge the laser radar according to the second input voltage.

2. The voltage switching control circuit for charging a laser radar as claimed in claim 1, characterized in that: It also includes a switch MOS tube, wherein the gate of the switch MOS tube is connected to a conduction enable signal, the drain of the switch MOS tube is connected to the charging channel circuit, and the source of the switch MOS tube is grounded.

3. The voltage switching control circuit for charging a laser radar as claimed in claim 2, characterized in that: The charging channel circuit includes: a plurality of identical channel sub-loops connected in parallel.

4. The voltage switching control circuit for charging a laser radar as claimed in claim 3, characterized in that: The channel sub-loop includes a transistor PMOSn, a light-emitting diode Dn and a capacitor Cn; the gate of the transistor PMOSn is connected to the second input voltage, the drain of the transistor PMOSn is connected to the charging channel circuit, the source of the transistor PMOSn is connected to one end of the capacitor Cn, and the other end of the capacitor Cn is grounded; the positive electrode of the light-emitting diode Dn is connected to the source of the transistor PMOSn, and the negative electrode of the light-emitting diode Dn is connected to the drain of the switch MOS tube.

5. The voltage switching control circuit for charging a laser radar as claimed in claim 1, characterized in that: The voltage switching circuit includes a first voltage switching circuit and a second voltage switching circuit; Wherein, the first voltage switching circuit is used to be turned on under the action of the first input voltage and charged with the first energy storage voltage; The second voltage switching circuit is used to be turned on under the action of the second input voltage and charged with the second energy storage voltage.

6. The voltage switching control circuit for charging a laser radar as claimed in claim 5, characterized in that: The first voltage switching circuit includes: a transistor PMOSa and a diode a; the gate of the transistor PMOSa is connected to the first input voltage, the drain of the transistor PMOSa is connected to the first energy storage voltage, the source of the transistor PMOSa is connected to the anode of the diode a, and the cathode of the diode a is connected to the charging channel circuit.

7. The voltage switching control circuit for charging a laser radar as claimed in claim 5, characterized in that: The second voltage switching circuit includes: a transistor PMOSb and a diode b; the gate of the transistor PMOSb is connected to the second input voltage, the drain of the transistor PMOSb is connected to the second energy storage voltage, the source of the transistor PMOSb is connected to the anode of the diode b, and the cathode of the diode b is connected to the charging channel circuit.

8. The voltage switching control circuit for charging a laser radar as claimed in claim 4, characterized in that: The transistor PMOSn is used to realize the opening or closing of the nth channel sub-loop.

9. The voltage switching control circuit for charging a laser radar as claimed in claim 4, characterized in that: The light emitting diode Dn is used to emit light when the n-th channel sub-circuit is turned on, so as to display the switch state of the n-th channel sub-circuit.

10. The voltage switching control circuit for charging a laser radar as claimed in claim 4, characterized in that: The capacitor Cn is used to store the charge of the nth channel sub-loop.

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