Circuit for realizing software control hardware restart of 4D millimeter wave radar

Abstract

The utility model discloses a circuit for a 4D millimeter wave radar to realize software control hardware restart, which comprises an input primary power supply DC-DC (Direct Current-Direct Current) for providing voltage for a system; the power supply PMIC is connected with the input primary power supply DC-DC and converts the voltage into a plurality of output voltages; the 4D millimeter wave radar main control unit is connected with the power supply PMIC and the input primary power supply DC-DC, and the power supply PMIC is connected with the input primary power supply DC-DC and is used for providing voltage input for the 4D millimeter wave radar main control unit; and the driving module is connected with the input primary power supply DC-DC and the 4D millimeter wave radar main control unit. Through the design of a hardware circuit, the hardware can be controlled to be restarted through software. The occurrence of unsuccessful restart events is effectively reduced, and the performance of the 4D millimeter wave radar is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to millimeter wave radar field, concretely is a kind of 4D millimeter wave radar and realizes the circuit of software control hardware restart. BACKGROUND

[0002] 4D millimeter wave radar increases height information on the basis of distance, azimuth, speed three dimensions of ordinary 3D radar, can well identify object information, reduce the occurrence of false alarm, is widely applied in vehicle-mounted, traffic flow, unmanned aerial vehicle, indoor monitoring and each field. 4D millimeter wave radar needs to be restarted to take effect under the condition such as switching configuration during working process, the current operation is sent softreset (soft reset) to let equipment soft restart, there is probability in this case, restart unsuccessfully, equipment appears to be down, to this, the utility model provides a kind of 4D millimeter wave radar and realizes the circuit of software control hardware restart, when needing to restart equipment, software control hardware restart, reduce the occurrence of down event. UTILITARY MODEL CONTENT

[0003] The utility model aims at providing a kind of 4D millimeter wave radar and realizes the circuit of software control hardware restart, to solve the occurrence of unsuccessful event of restart caused by soft restart.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of 4D millimeter wave radar and realizes the circuit of software control hardware restart, comprising:

[0005] input primary power DC-DC, provide voltage for system;

[0006] Power PMIC, connect with input primary power DC-DC, convert voltage into multiple output voltages;

[0007] 4D millimeter wave radar master unit, connect with power PMIC and input primary power DC-DC, the power PMIC connection and input primary power DC-DC are used to provide voltage input for 4D millimeter wave radar master unit;

[0008] Drive module, connect with input primary power DC-DC and 4D millimeter wave radar master unit.

[0009] As further improvement of the above technical scheme:

[0010] The input primary power DC-DC receives external input voltage and converts into 3.3V output, the input primary power DC-DC includes enablement EN pin, the drive module is connected with enablement EN pin.

[0011] The power supply PMIC includes one input and three outputs, and the output voltage of the power supply PMIC includes 1.8V, 1.2V and 1.0V.

[0012] The driving module includes an optocoupler U3, a resistor R2 and a resistor R3, wherein the pin 1 of the optocoupler U3 is connected with a GPIO_1 of the 4D millimeter wave radar master control unit, and the resistor R3 is connected in parallel with the ground, so that the state of the GPIO_1 is stable; the pin 2 of the optocoupler U3 is connected with the ground in series with the resistor R2; the pin 4 of the optocoupler U3 is directly connected with the ground; and the pin 3 of the optocoupler U3 is connected with an enable EN pin of the input primary power supply DC-DC, and the enable EN pin of the input primary power supply DC-DC is connected with the power supply input through the resistor R1.

[0013] The optocoupler U3 includes a light emitting diode Q1, a photosensitive element Q2, a field effect transistor Q3 and a field effect transistor Q4; when the GPIO_1 outputs a high level, the light emitting diode Q1 emits light, the photosensitive element Q2 receives the light of the light emitting diode Q1 and converts the light into an electric signal, charges the gate of the field effect transistor Q3 and the field effect transistor Q4, and the field effect transistor is turned on, so that the pin 3 and the pin 4 of the optocoupler U3 are turned on.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model discloses a hardware circuit design can be through software control hardware restart, when the radar switches the working mode, needs the radar restart to take effect, 4D millimeter wave radar master control unit controls GPIO_1 output high level, and the enable EN pin of input primary power supply DC-DC becomes low level instantaneously, and input primary power supply DC-DC restarts, and makes 4D millimeter wave radar restart. Effectively reduce the occurrence of the unsuccessful event of restarting, and improve the performance of 4D millimeter wave radar. DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2 It is the driving module structure schematic diagram of the utility model;

[0018] Figure 3 It is the optocoupler structure schematic diagram of the utility model;

[0019] Figure 4 It is the work flow schematic diagram of the utility model.

[0020] Fig. 1, input primary power supply DC-DC;2, power supply PMIC;3, 4D millimeter wave radar master control unit;4, driving module. DETAILED DESCRIPTION

[0021] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model will be further described below in combination with the specific embodiments.

[0022] In the description of the utility model, it should be pointed out that the directions or positions indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like are based on the direction or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance.

[0023] In the description of the utility model, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0025] As Figure 1As shown, the circuit for realizing software control hardware restart of the 4D millimeter wave radar in the embodiment comprises: an input first power supply DC-DC 1, a power supply PMIC 2, a 4D millimeter wave radar main control unit 3 and a driving module 4. The input first power supply DC-DC 1 is connected with the power supply PMIC 2 to provide an input voltage for the power supply PMIC 2 and a 3.3V input for the 4D millimeter wave radar main control unit 3. The power supply PMIC 2 provides 1.8V, 1.2V and 1.0V voltages for the 4D millimeter wave radar main control unit 3. The power supply PMIC is composed of three voltage-reducing DC-DCs packaged together. Each of the three voltage-reducing DC-DCs has a load current of 1.8V-3A, 1.2V-3A and 1.0V-4A respectively. The conversion efficiency is as high as 90%, meeting the requirements of the voltage rail and power consumption of the 4D millimeter wave radar chip. The 4D millimeter wave radar main control unit 3 can be normally started and worked after receiving the 3.3V, 1.8V, 1.2V and 1.0V voltages. The driving module 4 is connected with the GPIO port of the 4D millimeter wave radar main control unit 3 and the enable EN pin of the input first power supply DC-DC.

[0026] As shown in the figure, Figure 2 The enable EN pin of the input first power supply DC-DC 1 is connected with the power supply input port through a resistor R1, so that the enable EN pin keeps high level. The working condition of the input first power supply DC-DC is that the power supply input interface has an input voltage and the enable EN pin keeps high level. The enable EN pin is connected with the power supply input interface through the resistor R1-100K. The input voltage can reach the enable EN pin through the resistor R1. The resistor R1 has a resistance of 100K, which plays a role of current limiting and vibration elimination, protecting the enable EN pin and preventing power supply from shaking. When the GPIO_1 outputs low level, the 3 pin and the 4 pin of the optocoupler device are not conductive, the upper end and the lower end of the resistor R1 are both high level, and the enable EN pin keeps high level. When the GPIO_1 outputs high level, the 3 pin and the 4 pin of the optocoupler device are conductive, the lower end of the resistor R1 is instantaneously pulled low, the enable EN pin instantaneously becomes low, and the input first power supply DC-DC restarts. The enable EN pin is connected with the 3 pin of the optocoupler device U3, the 4 pin of the optocoupler device U3 is grounded, the 2 pin of the optocoupler device U3 is connected with the resistor R2 in series and grounded, and the 1 pin of the optocoupler device U3 is connected with the GPIO_1 of the 4D millimeter wave radar main control unit 3. A resistor R3 is connected in parallel between the 1 pin of the optocoupler device U3 and the GPIO_1 pin of the 4D millimeter wave radar main control unit 3, keeping the state of the GPIO_1 stable. When the GPIO_1 outputs high level, the 3 pin and the 4 pin of the optocoupler device U3 are conductive, and the enable EN pin is pulled low. The resistor R2 has a resistance of 220Ω, which is used for current limiting. The resistor R3 has a resistance of 10K, which is used for ensuring the stability of the GPIO_1.

[0027] As shown in the figure, Figure 3As shown, the opto-coupler U3 comprises a light emitting diode Q1, a photosensitive element Q2, a field effect tube Q3 and a field effect tube Q4; when the GPIO_1 outputs high level, the light emitting diode Q1 emits light, the photosensitive element Q2 receives the light of the light emitting diode Q1 and converts into an electric signal, charges the gate of the field effect tube Q3 and the field effect tube Q4, and the field effect tubes are turned on, that is, the 3-pin and 4-pin of the opto-coupler U3 are turned on.

[0028] As shown in the figure, Figure 4 As shown, the 4D millimeter wave radar works normally after power-on, and under certain conditions, such as encountering rainy and snowy weather, the radar working mode is switched, and the device needs to be restarted, the 4D millimeter wave radar main control unit 3 controls GPIO_1, when GPIO_1 outputs high level, the drive module 4 is turned on, the enable EN pin of the input first power supply DC-DC 1 is pulled low, and the power supply of the 4D millimeter wave radar and the 4D millimeter wave radar main control unit 3 are restarted; when GPIO_1 outputs low level, the drive module 4 is not turned on, the enable EN pin remains high level, and the device remains normal state.

[0029] The above-mentioned is only the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described in detail. For those skilled in the art, it is obvious that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A circuit for software-controlled hardware restart of a 4D millimeter-wave radar, characterized in that, It includes: The input primary power supply DC-DC (1) provides voltage for the system; The power supply PMIC (2) is connected with the input primary power supply DC-DC (1) and converts the voltage into multiple output voltages; The 4D millimeter wave radar master unit (3) is connected with the power supply PMIC (2) and the input primary power supply DC-DC (1), and the power supply PMIC (2) and the input primary power supply DC-DC (1) are used to provide voltage input for the 4D millimeter wave radar master unit (3); The driving module (4) is connected with the input primary power supply DC-DC (1) and the 4D millimeter wave radar master unit (3).

2. The 4D mmWave radar implementation circuit that reboots software controlling hardware according to claim 1, wherein: The input primary power supply DC-DC (1) receives external input voltage and converts it into 3.3V output, and the input primary power supply DC-DC (1) includes an enable EN pin, and the driving module (4) is connected with the enable EN pin.

3. The 4D mmWave radar circuit of claim 2, wherein: The power supply PMIC (2) includes one input and three outputs, and the output voltage of the power supply PMIC (2) includes 1.8V, 1.2V and 1.0V.

4. The 4D mmWave radar circuit of claim 3, wherein: The driving module (4) includes an optical coupling device U3, a resistor R2 and a resistor R3, wherein the 1 pin of the optical coupling device U3 is connected with the GPIO_1 of the 4D millimeter wave radar master unit (3), and the resistor R3 is connected in parallel to the ground to keep the state of the GPIO_1 stable, the 2 pin of the optical coupling device U3 is connected with the resistor R2 in series to the ground, the 4 pin of the optical coupling device U3 is directly connected to the ground, the 3 pin of the optical coupling device U3 is connected with the enable EN pin of the input primary power supply DC-DC (1), and the enable EN pin of the input primary power supply DC-DC (1) is connected with the power supply input through the resistor R1.

5. The 4D mmWave radar circuit of claim 4, wherein: The optical coupling device U3 includes a light emitting diode Q1, a photosensitive element Q2, a field effect transistor Q3 and a field effect transistor Q4; when the GPIO_1 outputs high level, the light emitting diode Q1 emits light, the photosensitive element Q2 receives the light of the light emitting diode Q1 and converts it into an electrical signal, charges the gate of the field effect transistor Q3 and the field effect transistor Q4, and the field effect transistor is turned on, so that the 3 pin and the 4 pin of the optical coupling device U3 are turned on.

Images