A transmitting end of a laser radar and a driving circuit of a laser system thereof

Abstract

The application discloses a kind of laser radar and its driving circuit of laser system, including first interface circuit, second interface circuit, drive gating module, integrated drive module and drive current regulation module;First interface circuit receives first address signal and transmits first address signal to the address input end of drive gating module;Second interface circuit receives drive control signal and transmits drive control signal to the drive control end of integrated drive module;Drive gating module is used to output the gate signal to integrated drive module according to first address signal;Drive current regulation module is used to output current regulation signal to the current regulation end of integrated drive module;Integrated drive module is used to gate drive path according to gate signal, and control the drive path according to drive control signal and current regulation signal Output laser drive signal, can realize the miniaturization design of laser radar, reduce the difference of laser in each subarea driven, and drive current linear continuous adjustable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of driving of laser radars, and in particular to a transmitting end of a laser radar and a driving circuit of a laser system thereof. BACKGROUND

[0002] A laser radar is a radar system for detecting the position, speed and other characteristic quantities of a target by emitting a laser beam. Its working principle is to emit a detection signal (laser beam) to a target through a laser, and then compare the signal (target echo) received from the target with the emitted signal, and after appropriate processing, the relevant information of the target, such as target distance, direction, height, speed, attitude, and even shape, can be obtained.

[0003] Nowadays, for a laser radar having multiple laser partitions, multiple driving circuits need to be provided for the multiple laser partitions, and the laser of each partition is driven in a discrete driving manner, so that the volume of the laser radar is large, and due to the difference between different devices, the difference in driving of the laser of each partition is large.

[0004] In addition, in the prior art, the driving current for driving the laser cannot be adjusted according to the requirement, and the peak value of the driving current is small, so that a good driving effect cannot be achieved. SUMMARY

[0005] The present application provides a transmitting end of a laser radar and a driving circuit of a laser system thereof, so as to provide a driving circuit of a laser system with linearly adjustable driving current and good driving effect.

[0006] According to an aspect of the present application, a driving circuit of a laser system is provided, the laser system comprising multiple partitions, each partition comprising at least one laser, comprising: a first interface circuit, a second interface circuit, a driving gating module, an integrated driving module and a driving current adjusting module.

[0007] The address output end of the first interface circuit is electrically connected with the address input end of the driving gating module, and the first interface circuit is configured to receive a first address signal and transmit the first address signal to the address input end of the driving gating module.

[0008] The output end of the second interface circuit is electrically connected with the driving control end of the integrated driving module, and the second interface circuit is configured to receive a driving control signal and transmit the driving control signal to the driving control end of the integrated driving module.

[0009] The output end of the driving gating module is electrically connected with the gating end of the integrated driving module, and the driving gating module is configured to output a gating signal to the integrated driving module according to the first address signal.

[0010] The drive current adjustment module is electrically connected with the current adjustment end of the integrated drive module, and is configured to output a current adjustment signal to the current adjustment end of the integrated drive module.

[0011] The integrated drive module is configured to drive the drive paths according to the gate signals, and control the driven paths to output laser drive signals according to the drive control signals and the current adjustment signal.

[0012] Optionally, the first interface circuit further comprises a first enable output end and a second enable output end.

[0013] The first enable output end is electrically connected with the enable end of the drive gate module, and the first interface circuit transmits a first enable signal to the enable end of the drive gate module through the first enable output end.

[0014] The second enable output end is electrically connected with the enable end of the integrated drive module, and the second interface circuit transmits a second enable signal to the enable end of the integrated drive module through the second enable output end.

[0015] Optionally, the drive circuit of the laser system further comprises a third interface circuit.

[0016] The synchronization output end of the integrated drive module is further electrically connected with a feedback input end of an external controller through the third interface circuit.

[0017] Optionally, the drive gate module comprises a 16-path analog switch.

[0018] Optionally, the drive circuit of the laser system further comprises a power conversion module.

[0019] The input end of the power conversion module receives a power signal through the first interface circuit, and the output end of the power conversion module is electrically connected with the power supply end of the integrated drive module, the drive input end of the integrated drive module, the power supply end of the drive gate module and the input end of the drive current adjustment module.

[0020] Optionally, the power conversion module comprises a boost voltage stabilizing chip, a first low-voltage conversion chip and a second low-voltage conversion chip.

[0021] The input end of the boost voltage stabilizing chip receives a power signal through the first interface circuit, and the output end of the boost voltage stabilizing chip is electrically connected with the drive input end of the integrated drive module.

[0022] The input end of the first low-voltage conversion chip receives a power signal through the first interface circuit, and the output end of the first low-voltage conversion chip is electrically connected with the power supply end of the integrated driving module.

[0023] The input end of the second low-voltage conversion chip receives a power signal through the first interface circuit, and the output end of the second low-voltage conversion chip is electrically connected with the power supply end of the driving gating module and the input end of the driving current adjusting module.

[0024] Optionally, the power conversion module further comprises a potentiometer.

[0025] The output end of the potentiometer is electrically connected with the output end of the voltage-lifting stabilizing chip.

[0026] Optionally, the driving circuit of the laser system further comprises a DIP switch.

[0027] The input end of the DIP switch receives a low-voltage direct-current power signal, the address output end of the DIP switch is electrically connected with the address input end of the driving gating module, and the gating enable output end of the DIP switch is electrically connected with the enable end of the driving gating module.

[0028] The driving enable output end of the DIP switch is electrically connected with the enable end of the integrated driving module.

[0029] Optionally, the integrated driving module comprises a plurality of laser driving signal output ends.

[0030] Each laser driving signal output end is connected with each laser through wire bonding.

[0031] According to another aspect of the present application, there is provided a transmitting end of a laser radar, comprising a radar detector, an external controller, a laser system and the above-mentioned driving circuit of the laser system.

[0032] The laser system comprises a plurality of sub-zones, each sub-zone comprising at least one laser.

[0033] The driving circuit of the laser system provided by the embodiment of the present application transmits an address signal to the driving gating module through the first interface circuit, so that the driving gating module selectively gates a plurality of driving channels in the integrated driving module according to the address signal, and transmits a driving control signal to the integrated driving module through the second interface circuit, so that the gated driving channel can drive the laser in the partition corresponding to the driving channel to emit light according to the driving control signal. In addition, the driving current adjusting module is arranged to linearly and continuously adjust the driving current output by the integrated driving module, so that the size of the driving current can be adjusted according to the optical path requirement, and thus the laser can be controlled to emit light according to the driving current. The driving circuit of the laser system adopts the integrated driving mode, so that the plurality of driving channels are realized by the same integrated chip, and compared with the discrete driving mode, the volume of the product can be greatly reduced. When the driving circuit of the laser system is applied to the laser radar, the difference in the output laser of the laser in each partition can be reduced on the basis of realizing the miniaturization of the laser radar, the driving effect of the laser in each partition is relatively uniform, and linear and continuous adjustment of the driving current is realized, so that the driving current of the driving laser can be linearly and continuously adjusted in the preset range.

[0034] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a structural schematic diagram of a driving circuit of a laser system provided by an embodiment of the present application;

[0037] Figure 2 is a structural schematic diagram of a first interface circuit provided by an embodiment of the present application;

[0038] Figure 3 is a structural schematic diagram of a second interface circuit provided by an embodiment of the present application;

[0039] Figure 4 is a structural schematic diagram of a driving gating module provided by an embodiment of the present application;

[0040] Figure 5 is a structural schematic diagram of an integrated driving module provided by an embodiment of the present application;

[0041] Figure 6 is a structural schematic diagram of a driving current adjusting module provided by an embodiment of the present application;

[0042] Figure 7 is a structural schematic diagram of a driving circuit of a laser system provided by an embodiment of the present application;

[0043] Figure 8 is a structural schematic diagram of a dial selection switch provided by an embodiment of the present application;

[0044] Figure 9 is a structural schematic diagram of a third interface circuit provided by an embodiment of the present application;

[0045] Figure 10 is a structural schematic diagram of a power conversion module provided by an embodiment of the present application;

[0046] Figure 11 is a structural schematic diagram of a transmitting end of a laser radar provided by an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the personnel in the art without creative labor should belong to the protection scope of the present application.

[0048] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0049] Figure 1 is a structural schematic diagram of a driving circuit of a laser system provided by an embodiment of the present application, Figure 2 is a structural schematic diagram of a first interface circuit provided by an embodiment of the present application, Figure 3 is a structural schematic diagram of a second interface circuit provided by an embodiment of the present application,Figure 4 is a structural schematic diagram of a drive gating module provided by an embodiment of the present application, Figure 5 is a structural schematic diagram of an integrated drive module provided by an embodiment of the present application, Figure 6 is a structural schematic diagram of a drive current adjusting module provided by an embodiment of the present application, in combination with reference Figures 1 to 6 The drive circuit of the laser system includes a first interface circuit 10, a second interface circuit 20, a drive gating module 30, an integrated drive module 40, and a drive current adjusting module 50. The laser system includes a plurality of partitions, each of which includes at least one laser. Exemplarily, the laser system can include 12 partitions (A1-A12). The drive circuit of the laser system 00 includes: a first interface circuit 10, a second interface circuit 20, a drive gating module 30, an integrated drive module 40, and a drive current adjusting module 50. The address output end of the first interface circuit 10 is electrically connected with the address input end (S0, S1, S2, S3) of the drive gating module 30. The first interface circuit 10 is configured to receive a first address signal and transmit the first address signal to the address input end of the drive gating module 30. The output end of the second interface circuit 20 is electrically connected with the drive control end (ELP, ELN, NELP, NELN) of the integrated drive module 40. The second interface circuit 20 is configured to receive a drive control signal and transmit the drive control signal to the drive control end of the integrated drive module 40. The output end (Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, Y12) of the drive gating module 30 is electrically connected with the gating end (EN0, EN1, EN2, EN3, EN4, EN5, EN6, EN7, EN8, EN9, E10, EN11) of the integrated drive module 40. The drive gating module 30 is configured to output a gate signal to the integrated drive module according to the first address signal. The drive current adjusting module 50 is electrically connected with the current adjusting end (C10, C11, C12, C13) of the integrated drive module 40. The drive current adjusting module 50 is configured to output a current adjusting signal to the current adjusting end C11 of the integrated drive module 40. The integrated drive module 40 is configured to gate a drive path according to the gate signal and control the gated drive path to output a laser drive signal according to the drive control signal and the current adjusting signal.

[0050] Specifically, the first interface circuit 10 can include a first terminal J1, which is preferably XH-2.54. An external controller can be configured to provide an address signal to the drive circuit, and the first terminal J1 input pin (not shown in the figure) can be electrically connected to the address output end of the external controller. The pins 7, 8, 9, and 10 thereof serve as address output ends and are electrically connected to the address input ends (S0, S1, S2, S3) of the drive gating module 30, respectively. Thus, when the external controller selects a certain sub-area of the laser to light up, it can output the address signal corresponding to the sub-area through its address output end, and transmit the address signal to the drive gating module 30 through the first interface circuit 10. The address signals received by the address input ends S0, S1, S2, and S3 of the drive gating module 30 can form a group of binary numbers, which can express the numbers 0-15 through the group of binary numbers, so that the drive gating module 30 can select the corresponding drive path according to the received address signal. The output ends Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, and Y12 of the drive gating module 30 can be electrically connected to the gating ends EN0, EN1, EN2, EN3, EN4, EN5, EN6, EN7, EN8, EN9, EN10, and EN11 of the integrated drive module 40, respectively. For example, when the address signal received by the drive gating module 30 is 0001, the output end Y1 thereof can output a high level, and the gating end EN0 of the integrated drive module 40 receives a high level signal, so that the drive path corresponding to EN0 is turned on.

[0051] The second interface circuit 20 can be electrically connected with the drive signal output end of the external controller, and the output end of the second interface circuit 20 is electrically connected with the drive control end (ELP, ELN, NELP, NELN) of the integrated drive module 40, for receiving the drive control signal provided by the external controller and transmitting the drive control signal to the drive control end of the integrated drive module 40. The drive control signal received by the drive control end ELP, ELN, NELP, NELN can be two groups of mutually inverse low-voltage differential pulse signals (LVDS), that is, the drive control signal received by ELP and ELN is one group of mutually inverse low-voltage differential pulse signals, and the drive control signal received by NELP and NELN is one group of mutually inverse low-voltage differential pulse signals. In the process of driving the laser, one group of signals can be used as an enable signal, and the other group of signals can be used as a trigger signal. For example, corresponding to four independent drive control signals received by the four drive control ends ELP, ELN, NELP, NELN, the second interface circuit 20 can be correspondingly provided with four terminals (the second terminal J2, the third terminal J3, the fourth terminal J4 and the fifth terminal J5). The above four terminals are preferably IPEX radio frequency terminals. The output end SO1 of the second terminal J2 can be electrically connected with the drive control end ELP, the output end SO2 of the third terminal J3 can be electrically connected with the drive control end ELN, the output end SO3 of the fourth terminal J4 can be electrically connected with the drive control end NELP, and the output end SO4 of the fifth terminal J5 can be electrically connected with the drive control end NELN. The drive control end ELP and the output end SO1 of the second terminal J2 can be electrically connected through the tenth resistor R10, the drive control end ELN and the output end SO2 of the third terminal J3 can be electrically connected through the eleventh resistor R11, and the drive control end ELP and the drive control end ELN can be further electrically connected through the twelfth resistor R12. The drive control end NELP and the output end SO3 of the fourth terminal J4 can be electrically connected through the thirteenth resistor R13, the drive control end NELN and the output end SO4 of the fifth terminal J5 can be electrically connected through the fourteenth resistor R14, and the drive control end NELP and the drive control end NELN can be further electrically connected through the fifteenth resistor R15.

[0052] The integrated drive module 40 controls the corresponding drive path to be turned on according to the selection signal, so that the drive control signal provided by the second interface circuit 20 can be received to output the laser drive signal for driving the laser to emit light under the action of the drive control signal; the laser has different luminous brightness according to the size of the driving current, and the driving current adjusting module 50 can include the first potentiometer U1, and the driving current of the laser drive signal can be adjusted through the first potentiometer U1, so that the driving current output by the integrated drive module 40 can be linearly and continuously adjusted, the first wiper of the first potentiometer U1 is electrically connected with the current adjusting end (C10, C11, C12, C13) of the integrated drive module 40, and the first wiper 1 is also grounded through the first capacitor C1, and the first capacitor C1 is used for filtering, and in an optional embodiment, the first wiper 1 can also be grounded through the series connection of the sixteenth resistor R16, the seventeenth resistor R17 and the first capacitor C1. The second wiper CW1 of the first potentiometer U1 is grounded, and the third wiper CCW1 (the input end of the driving current adjusting module 50) of the first potentiometer U1 receives the low-voltage direct-current voltage signal VCC (for example, +5V). Wherein, the integrated drive module 40 preferably includes the integrated drive chip TE-229 (that is, U2), and the integrated drive chip U2 can include 12 high-side drive paths, and can correspondingly drive 12 partitioned lasers.

[0053] The driving circuit of the laser system provided by the embodiment of the present application transmits the address signal to the drive gating module through the first interface circuit, so that the drive gating module selectively gates the multiple drive paths in the integrated drive module according to the address signal, and transmits the drive control signal to the integrated drive module through the second interface circuit, so that the gated drive path can drive the laser in the corresponding partition to emit light according to the drive control signal. In addition, the driving current adjusting module is arranged to linearly and continuously adjust the driving current output by the integrated drive module, so that the size of the driving current can be adjusted according to the optical path requirement, so that the laser can emit light according to the driving current. The driving circuit of the laser system adopts the integrated drive mode, so that the multiple drive paths are realized by the same integrated chip, which can greatly reduce the volume of the product compared with the discrete drive mode. When the driving circuit of the laser system is applied to the laser radar, the difference in the output laser of the laser in each partition can be reduced on the basis of realizing the overall miniaturization of the laser radar, so that the driving effect of the laser in each partition is more uniform, and the linear and continuous adjustment of the driving current is realized, so that the driving current for driving the laser can be linearly and continuously adjusted in the preset range.

[0054] Optionally, with reference to Figure 4The driving gating module comprises a 16-channel analog switch U3, address input ends S0, S1, S2 and S3 of the 16-channel analog switch U3 are address signal receiving ends, and the 16-channel analog switch U3 comprises 16 output ends (Y0-Y15). In the embodiment of the application, 12 output ends (for example, Y1-Y12) of the 16-channel analog switch U3 can be used to drive 12 laser devices in each partition. The 12 output ends can be grounded through first resistors R1, and one end of each first resistor R1 is electrically connected to a corresponding gating end (EN0-EN11) in the integrated driving module 40. The first resistor R1 is used for current limiting. The resistance value of the first resistor R1 can be set according to design requirements. The enable end EN of the 16-channel analog switch U3 can be low-level effective. The ground end GND1 of the 16-channel analog switch U3 is grounded.

[0055] Optionally, in combination with reference Figures 1 to 6 The first interface circuit 10 further comprises a first enable output end and a second enable output end. The first enable output end is electrically connected to the enable end of the driving gating module 30, and the first interface circuit 10 transmits the first enable signal to the enable end EN of the driving gating module 40 through the first enable output end. The second enable output end is electrically connected to the enable end DISWD of the integrated driving module 40, and the second interface circuit 20 transmits the second enable signal to the enable end DISWD of the integrated driving module 40 through the second enable output end.

[0056] Specifically, as in the above embodiment, the first interface circuit 10 is preferably an XH-2.54 terminal (the first terminal J1). The external controller can set two enable signal output ends (the first enable signal output end and the second enable signal output end) for the driving gating module 30 and the integrated driving module 40 respectively, and can output two enable signals (i.e., the first enable signal and the second enable signal) respectively. The first terminal J1 can also receive the first enable signal and the second enable signal provided by the external controller, and the first enable output end (pin 5) thereof is electrically connected to the enable end EN of the driving gating module 30, and the second enable output end (pin 6) thereof is electrically connected to the enable end DISWD of the integrated driving module 40, so as to transmit the first enable signal provided by the external controller to the enable end EN of the driving gating module 30, and transmit the second enable signal to the enable end DISWD of the integrated driving module 40, so that the driving gating module 30 can enter the wake-up state according to the received first enable signal, and the integrated driving module 40 can enter the wake-up state according to the received second enable signal. The enable end DISWD of the integrated driving module 40 can be the enable end of the watchdog circuit in the integrated driving module 40. The pin 2 and the pin 4 of the first terminal J1 are grounded, and the connection of the pin 1 is not limited.

[0057] Optionally, in a feasible embodiment, the address signal, the enable signal and the drive control signal can be provided by setting the dial selection switch instead of the external controller. Figure 7 is a structural schematic diagram of another drive circuit of a laser system provided by an embodiment of the present application, Figure 8 is a structural schematic diagram of a dial selection switch provided by an embodiment of the present application, in combination with reference to Figure 7 and Figure 8 As shown in FIG. 8 and FIG. 9, the drive circuit 00 of the laser system further comprises a dial selection switch U8; the input end (pins 11-16) of the dial selection switch U8 receives the low-voltage DC power signal VCC, the address output end (pins 19-22) of the dial selection switch U8 is electrically connected with the address input end (S0-S3) of the drive gating module, the gating enable output end (pin 18) of the dial selection switch U8 is electrically connected with the enable end EN of the drive gating module 30; the drive enable output end (pin 7) of the dial selection switch U8 is electrically connected with the enable end DISWD of the integrated drive module 40.

[0058] Specifically, the input end (pins 11-16) of the dial selection switch U8 can receive the low-voltage DC power signal VCC through the eighth resistor R8, and the low-voltage DC power signal VCC can be a +5V DC voltage; the six input ends (pins 11-16) of the dial selection switch U8 can be one-to-one corresponding with the output ends (pins 22-17) thereof and electrically connected therewith through a controllable switch K1; the user can control the on-off of the switch electrically connected with the pins 17-22 of the dial selection switch U8 to output the required address signal to the drive gating module 30, and can control the on-off of the switch between the pin 18 and the pin 15 of the dial selection switch U8 to transmit the enable signal to the enable end EN of the drive gating module 30; it can be understood that if the enable end EN of the drive gating module 30 is low-level effective, the drive gating module 30 is enabled when the switch between the pin 18 and the pin 15 is turned off; similarly, the user can control the on-off of the switch between the pin 17 and the pin 16 of the dial selection switch U8 to transmit the enable signal to the enable end DISWD of the integrated drive module 40. In this way, the user can also perform gating operation on the multiple drive paths in the integrated drive module 40 through the hardware structure (i.e. the dial selection switch U8).

[0059] For example, the outputs (pins 22-17) of the DIP switch U8 can also be connected to ground through the ninth resistor R9 for voltage division. It should be noted that, for the convenience of explanation, the present embodiment only exemplarily describes that the resistors connected to the outputs of the DIP switch U8 are the ninth resistors R9 with the same resistance value. It can be understood that the resistors connected to the outputs of the DIP switch U8 can be resistors with different resistance values, and the resistance values of the resistors can be set according to design requirements, which are not limited in the present embodiment.

[0060] Optionally, Figure 9 is a structural schematic diagram of a third interface circuit provided by the present embodiment, which is described in combination with reference to Figures 2 to 8 The driving circuit 00 of the laser system further comprises a third interface circuit 60; the synchronization outputs (SYNCP1, SYNCN1) of the integrated driving module 40 are further electrically connected to the feedback inputs of the external controller through the third interface circuit 60.

[0061] Specifically, when the integrated driving module 40 outputs the laser driving signal, the synchronization outputs (SYNCP1, SYNCN1) synchronously output the feedback signal, which can be transmitted to the external controller through the third interface circuit 60. In addition, the laser signal emitted by the laser irradiates the surface of the target object and reflects a part of the reflected signal, which is received by the radar sensor and sent to the external controller, so that the external controller can realize the functions of light detection and distance measurement according to the received feedback signal and reflected signal.

[0062] For example, the third interface circuit 60 can comprise a sixth terminal J6 and a seventh terminal J7, and the sixth terminal J6 and the seventh terminal J7 are preferably IPEX radio frequency terminals. The two synchronization outputs SYNCP1, SYNCN1 can be respectively electrically connected to the input SIN1 of the sixth terminal J6 and the input SIN2 of the seventh terminal J7, and the sixth terminal J6 and the seventh terminal J7 are respectively connected to the two feedback inputs of the external controller to realize the function of signal transmission. The two synchronization outputs SYNCP1, SYNCN1 are further electrically connected through the second resistor R2.

[0063] Optionally, referring to Figure 7 The driving circuit 00 of the laser system further comprises a power conversion module 70; the input of the power conversion module 70 receives the power signal through the first interface circuit 10, and the output of the power conversion module 70 is electrically connected to the power supply end VDD1 of the integrated driving module 40, the driving input end VLDA of the integrated driving module 40, the power supply end (VCC1, Z) of the driving gating module 30, and the input CCW1 of the driving current adjusting module 50.

[0064] Specifically, the power conversion module 70 can be configured to convert the power signal provided by the external power supply into power supply required by each module in the driving circuit, so that only one external power supply is required, for example, the power signal provided by the external power supply can be 12V DC voltage, the 12V DC voltage can be transmitted to the power conversion module 70 through the pin 3 of the first wiring terminal J1, and the power conversion module 70 can convert the 12V DC voltage into the logic voltage VCC_+5V, VDD_+5V required by the driving gate module 30, the integrated driving module 40 and the driving current regulation module 50, and the 5V-30V continuous adjustable DC voltage required by the integrated driving module 40, as the driving input voltage of the integrated driving module 40, that is, when a certain driving path is turned on, under the control of the driving control signal, the laser driving signal can be output according to the driving output voltage.

[0065] Optionally, Figure 10 is a structural schematic diagram of a power conversion module provided by an embodiment of the present application, as Figure 10 shown, the power conversion module 70 includes a boost type voltage stabilizing chip U4, a first low voltage conversion chip U5 and a second low voltage conversion chip U6; the input end SVIN of the boost type voltage stabilizing chip U4 receives the power signal through the first interface circuit 10, and the output end VOUT1 of the boost type voltage stabilizing chip U4 is electrically connected with the driving input end VLDA of the integrated driving module 40; the input end VIN1 of the first low voltage conversion chip U5 receives the power signal through the first interface circuit 10, and the output end VOUT2 of the first low voltage conversion chip U5 is electrically connected with the power supply end VDD1 of the integrated driving module 40; the input end VIN2 of the second low voltage conversion chip U6 receives the power signal through the first interface circuit 10, and the output end VOUT3 of the second low voltage conversion chip U6 is electrically connected with the power supply end of the driving gate module 30 and the input end CCW1 of the driving current regulation module 50.

[0066] Specifically, the boost voltage regulator chip U4 is preferably a DC-DC power conversion chip LTM8083, which can convert a 12V DC voltage into a continuously adjustable 5V-30V DC voltage, and can transmit the DC voltage to the drive input terminal VLDA of the integrated drive module 40, so that the selected drive path in the integrated drive module 40 can output a drive current according to the DC voltage under the control of the drive control signal. A plurality of parallelly connected capacitors (not shown in the figure) can be provided between the drive input terminal VLDA of the integrated drive module 40 and the output terminal VOUT1 of the boost voltage regulator chip U4 to play a filtering role. The first low-voltage conversion chip U5 and the second low-voltage conversion chip U6 are preferably MCP1703 low-voltage conversion chips, which can convert a 12V DC voltage into a VDD_+5V DC voltage using the first low-voltage conversion chip U5, and provide the voltage as a logic voltage to the power supply terminal VDD1 of the integrated drive module 40, and convert a 12V DC voltage into a VCC_+5V DC voltage using the second low-voltage conversion chip U6, and provide the voltage as a logic voltage to the power supply terminal (VCC1, Z) of the drive gating module 30 and the input terminal CCW1 of the drive current regulating module 50.

[0067] For example, the output terminal VOUT3 of the second low-voltage conversion chip U6 can provide a low-voltage DC power signal VCC to the drive circuit, i.e., provide a VCC_+5V DC voltage to each module of the drive circuit. In a feasible embodiment, the first power supply terminal VCC1 of the 16-path analog switch U3 can be electrically connected to the output terminal VOUT2 of the second low-voltage conversion chip U6 through a third resistor R3, and the first power supply terminal VCC1 can also be grounded through a second capacitor C2, wherein the second capacitor C2 is used for filtering, and the third resistor R3 is used for current limiting; the second power supply terminal Z can be electrically connected to the output terminal VOUT3 of the second low-voltage chip U6 through a fourth resistor R4, and the second power supply terminal Z can be grounded through a fifth resistor R5, and the fourth resistor R4 and the fifth resistor R5 are used for voltage division. Optionally, continuing to refer to Figure 10 , the power conversion module 70 further comprises a potentiometer U7, and the output terminal CCW2 of the potentiometer U7 is electrically connected to the output terminal VOUT1 of the boost voltage regulator chip U4.

[0068] Specifically, the resistance of the potentiometer U7 can be adjusted by an external controller, and the adjustment of the resistance of the potentiometer U7 can achieve the adjustment of the output voltage of the boost voltage regulator chip U4. On this basis, the peak value of the drive current output by the integrated drive module 40 can reach 40A by adjusting the potentiometer U1.

[0069] For example, the output end VOUT1 of the boost voltage stabilizing chip U4 can be electrically connected with one end of the sixth resistor R6, the other end of the sixth resistor R6 is electrically connected with the first end of the fuse F1 at the first node a, the second end of the fuse F1 is electrically connected with the driving input end VLDA of the integrated driving module 40, and the second end of the fuse F1 is also grounded through the third capacitor C3 and the fourth capacitor C4 connected in parallel; the output end CCW2 of the potentiometer U7 can be electrically connected with the first node a through the seventh resistor R7, so that the voltage dividing effect of the output voltage of the boost voltage stabilizing chip U4 can be realized, and the size of the voltage division is different when the resistance value of the potentiometer U7 is different, so that the continuous adjustment of the output voltage of the boost voltage stabilizing chip U4 can be realized.

[0070] Optionally, referring to Figure 5 , the integrated driving module 40 includes a plurality of laser driving signal output ends (OUT0-OUT11); each laser driving signal output end is wire-bonded with each laser 01.

[0071] Specifically, the output ends of the laser driving signals of the integrated driving module 30 can be directly wire-bonded with the corresponding laser 01, compared with the connection mode of welding the packaged driving chip with the corresponding laser in the prior art, the parasitic parameters in the driving circuit can be effectively reduced, so that the pulse width of the laser driving signal can be effectively reduced, and experiments prove that the output ends of the laser driving signals of the integrated driving module 30 can be electrically connected with the corresponding laser 01 through the direct wire-bonding mode, so that the pulse width of the laser driving signal can be reduced to about 2ns, the energy of the laser driving signal is more concentrated, and a better driving effect is achieved.

[0072] Based on the same inventive concept, the embodiment of the present application also provides a transmitting end of a laser radar, Figure 11 is a structural schematic diagram of the transmitting end of the laser radar provided by the embodiment of the present application, as Figure 11 shown, the transmitting end of the laser radar includes a radar detector 1, an external controller 2, a laser system 3 and the driving circuit 00 of the laser system provided by any embodiment of the present application, therefore the transmitting end of the laser radar provided by the embodiment of the present application includes the technical features of the driving circuit of the laser system provided by any embodiment of the present application, and can achieve the beneficial effects of the driving circuit of the laser system provided by any embodiment of the present application, and the same parts can be referred to the above description of the driving circuit of the laser system provided by the embodiment of the present application, which will not be described here. The laser system includes a plurality of partitions, and each partition includes at least one laser.

[0073] The above detailed description does not limit the scope of the application. Various modifications, combinations, sub-combinations and alternatives can be made to the detailed description. Any modification, equivalent replacement and improvement etc. made within the spirit and principle of the application shall be included in the scope of the application.

Claims

1. A driving circuit of a laser system, the laser system comprising a plurality of zones, each zone comprising at least one laser, characterized in that, The application relates to a laser driving circuit. The first interface circuit, the second interface circuit, the driving gate module, the integrated driving module and the driving current adjusting module are connected with each other. The address output end of the first interface circuit is electrically connected with the address input end of the driving gate module, the first interface circuit is used for receiving a first address signal and transmitting the first address signal to the address input end of the driving gate module. The output end of the second interface circuit is electrically connected with the driving control end of the integrated driving module, the second interface circuit is used for receiving a driving control signal and transmitting the driving control signal to the driving control end of the integrated driving module. The output end of the driving gate module is electrically connected with the gate end of the integrated driving module, the driving gate module is used for outputting a gate signal to the integrated driving module according to the first address signal. The driving current adjusting module is electrically connected with the current adjusting end of the integrated driving module, the driving current adjusting module is used for outputting a current adjusting signal to the current adjusting end of the integrated driving module. The integrated driving module is used for selecting a driving path according to the gate signal and controlling the selected driving path to output a laser driving signal according to the driving control signal and the current adjusting signal.

2. The driving circuit of a laser system according to claim 1, wherein The first interface circuit further comprises a first enable output end and a second enable output end. The first enable output end is electrically connected with the enable end of the driving gate module, the first interface circuit transmits a first enable signal to the enable end of the driving gate module through the first enable output end. The second enable output end is electrically connected with the enable end of the integrated driving module, the second interface circuit transmits a second enable signal to the enable end of the integrated driving module through the second enable output end.

3. The driving circuit of a laser system according to claim 1, wherein The application further comprises a third interface circuit. The synchronization output end of the integrated driving module is further electrically connected with the feedback input end of an external controller through the third interface circuit. The driving gate module comprises 16-path analog switches.

4. The driving circuit of a laser system according to claim 1, wherein The application further comprises a power conversion module.

5. The driving circuit of a laser system according to claim 1, wherein The input end of the power conversion module receives a power signal through the first interface circuit, the output end of the power conversion module is electrically connected with the power supply end of the integrated driving module, the driving input end of the integrated driving module, the power supply end of the driving gate module and the input end of the driving current adjusting module. The power conversion module comprises a boost type voltage stabilizing chip, a first low-voltage conversion chip and a second low-voltage conversion chip. The input end of the boost type voltage stabilizing chip receives a power signal through the first interface circuit, the output end of the boost type voltage stabilizing chip is electrically connected with the driving input end of the integrated driving module.

6. The driving circuit of a laser system according to claim 5, wherein The input end of the first low-voltage conversion chip receives a power signal through the first interface circuit, the output end of the first low-voltage conversion chip is electrically connected with the power supply end of the integrated driving module. The input end of the second low-voltage conversion chip receives a power signal through the first interface circuit, the output end of the second low-voltage conversion chip is electrically connected with the power supply end of the driving gate module and the input end of the driving current adjusting module. The power conversion module further comprises a potentiometer. ​ 7. The driving circuit of a laser system according to claim 6, wherein ​ The output end of the potentiometer is electrically connected with the output end of the boost type voltage stabilizing chip.

8. The driving circuit of a laser system according to claim 1, wherein Further comprising: A dial selection switch; The input end of the dial selection switch receives a low-voltage direct-current power supply signal, the address output end of the dial selection switch is electrically connected with the address input end of the driving gating module, and the gating enable output end of the dial selection switch is electrically connected with the enable end of the driving gating module. The driving enable output end of the dial selection switch is electrically connected with the enable end of the integrated driving module.

9. The driving circuit of a laser system according to claim 1, wherein, The integrated driving module comprises a plurality of laser driving signal output ends. Each laser driving signal output end is wire-bonded with each laser.

10. A transmitting end of a laser radar, characterized by The laser system comprises a plurality of sub-zones, and each sub-zone comprises at least one laser. The laser system comprises a plurality of sub-zones, and each sub-zone comprises at least one laser.

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