阅读说明：本技术 一种光发射装置及测距装置、移动平台 (Light emitting device, distance measuring device and mobile platform ) 是由 黄森洪 马亮亮 刘祥 于 2019-01-09 设计创作，主要内容包括：提供了一种光发射装置、包括该光发射装置的测距装置以及包括该测距装置的移动平台,其中该光发射装置包括至少两条激光发射线路,每条所述激光发射线路包括电源、激光发射器(Dl或D2或D3)、储能电路和控制电路；在每条激光发射线路中,控制电路用于在第一时段内导通本条激光发射线路中的储能电路和电源,使得电源对储能电路储能；该控制电路还用于在第二时段内导通本条激光发射线路中的激光发射器(Dl或D2或D3)和储能电路,使得储能电路对激光发射器(Dl或D2或D3)供电,以使激光发射器(Dl或D2或D3)出射光脉冲信号；其中,该两条以上的激光发射线路共用该电源。该光发射装置可以实现对不同的光发射器出光能量的校准,补偿各线的差异,使得多线光发射器均能符合人眼安全的限制并简化电路,降低硬件成本。(A light emitting device, a ranging device including the light emitting device, and a mobile platform including the ranging device are provided, wherein the light emitting device includes at least two laser emitting lines, each of the laser emitting lines includes a power supply, a laser emitter (Dl or D2 or D3), a tank circuit, and a control circuit; in each laser emission line, the control circuit is used for conducting the energy storage circuit and the power supply in the laser emission line in a first period so that the power supply stores energy in the energy storage circuit; the control circuit is also used for conducting the laser emitter (Dl or D2 or D3) and the energy storage circuit in the laser emission line in a second period, so that the energy storage circuit supplies power to the laser emitter (Dl or D2 or D3) to enable the laser emitter (Dl or D2 or D3) to emit light pulse signals; wherein the two or more laser emitting lines share the power supply. The light emitting device can realize the calibration of the light emitting energy of different light emitters and compensate the difference of each line, so that the multi-line light emitter can meet the limit of human eye safety, simplify the circuit and reduce the hardware cost.)

A light emitting device is characterized in that the light emitting device comprises at least two laser emitting circuits, and each laser emitting circuit comprises a power supply, a laser emitter, an energy storage circuit and a control circuit;

in each laser emission line, the control circuit is used for conducting the energy storage circuit and the power supply in the laser emission line in a first period of time, so that the power supply stores energy in the energy storage circuit;

the control circuit is further used for conducting the laser emitter and the energy storage circuit in the laser emission line in a second time period, so that the energy storage circuit supplies power to the laser emitter to enable the laser emitter to emit light pulse signals;

wherein the two or more laser emission lines share the power supply.

The light emitting device according to claim 1, wherein the laser emitters in each of the at least two laser emitting circuits are configured to emit a sequence of light pulses, and the at least two laser emitting circuits are configured to alternately emit the sequence of light pulses.

The optical transmitter according to claim 2, wherein between two adjacent emission of optical pulse signals by one of the at least two laser emitting lines, the remaining laser emitting lines of the at least two laser emitting lines respectively emit one optical pulse signal in turn.

The light emitting device according to any one of claims 1 to 3, wherein at least a part of the control circuit is shared by the two or more laser emission lines.

The light emitting device according to claim 4, wherein the control circuit controls the laser emitting lines in different periods of time, and respectively implements different emitting light signals of the laser emitters in the laser emitting lines in different periods of time.

The light-emitting device according to claim 4, wherein the control circuit includes a first switch circuit and a second switch circuit;

in each laser emission line, the first switch circuit is used for switching on and switching off the connection between the power supply and the energy storage circuit of the laser emission line according to the driving signal, and the second switch circuit is used for switching on and switching off the connection between the energy storage circuit and the laser emitter according to the driving signal.

The light emitting device according to claim 6, wherein the at least two laser emission lines share the first switch circuit and/or the second switch circuit.

The light emitting device according to claim 6 or 7, wherein the first switch circuit is configured to control the tank circuits in different laser emission lines to be connected with and disconnected from the power supply respectively in different periods according to the driving signal;

and/or the presence of a gas in the gas,

the second switch circuit is used for respectively controlling the connection and disconnection of the energy storage circuits in different laser emitting circuits and the laser emitter in different periods according to the driving signals.

The optical transmitter apparatus of claim 6, wherein in at least one laser transmitter circuit, the tank circuit comprises an inductor and a capacitor, and the first switch circuit and the second switch circuit are the same switch circuit;

the switch circuit is used for switching on and switching off the connection between the power supply and the energy storage circuit of the laser emission circuit according to the driving signal, and switching on and switching off the connection between the energy storage circuit and the laser emitter.

The light-emitting device according to claim 8, wherein the first switch circuit and the second switch circuit are the same switch circuit, and the same switch circuit realizes functions of the first switch circuit and the second switch circuit in time sequence, respectively.

The light emitting device according to any one of claims 1 to 3,5 to 7,9 and 10, wherein among the at least two laser emission lines, pulse widths of at least two laser emission lines for controlling the first switch circuit are different and/or pulse widths of at least two laser emission lines for controlling the second switch circuit are different.

The light emitting device according to any one of claims 1 to 3, wherein at least two of the laser emission lines share at least part of the tank circuit.

The light emitting device of claim 12, wherein the energy storage circuit stores energy during different periods of time and powers the laser emitters in different laser emission lines during different periods of time.

The light emitting device of claim 12, wherein the energy storage circuit comprises a resistor and a capacitor.

The light emitting device according to claim 14, wherein the two or more laser emission lines share the resistor and/or the capacitor.

The light emitting device of claim 14, wherein in one laser emission line:

during the first period, a first loop circuit is conducted, the first loop circuit comprises the power supply, the resistor and the capacitor which are connected in series, and the power supply charges the capacitor through the resistor;

during the second period, a second loop is turned on, the second loop including the capacitor and the laser transmitter in series.

The light emitting device of claim 10, wherein the tank circuit comprises an inductor and a capacitor.

The light emitting device according to claim 17, wherein the two or more laser emission lines share the inductor and/or the capacitor.

The light emitting device according to claim 17, wherein the first period includes a third period and a fourth period; in a laser emission line:

during the third period, a first loop is conducted, wherein the first loop comprises the power supply and the inductor which are connected in series, and the power supply is used for charging the inductor;

during the fourth period, a second loop is turned on, the second loop including the inductor and the capacitor connected in series, the inductor being used to charge the capacitor;

and in the second period, the third loop is conducted, and the capacitor and the laser transmitter are conducted.

The light-emitting device of claim 19, wherein the third period of time and the second period of time at least partially overlap.

The light-emitting device according to claim 19, wherein the control circuit includes a switching circuit for turning on and off in accordance with a drive signal;

the first loop circuit comprises the power supply, the inductor, a first diode, the laser transmitter, and the switching circuit in series;

the second loop circuit includes the inductor, the first diode, and the capacitor in series;

the third loop circuit includes the capacitor, the laser transmitter, and the switching circuit.

The light-emitting device according to claim 19, wherein the control circuit includes a switching circuit for turning on and off in accordance with a drive signal;

the first loop circuit comprises the power supply, the inductor, a first diode and the switch circuit connected in series;

the second loop circuit includes the inductor, the first diode, a second diode, and the capacitor in series;

the third loop circuit comprises the capacitor, the laser transmitter and the switching circuit in series.

The light emitting device according to claim 14, wherein the control circuit comprises a first switch circuit and a second switch circuit, the first switch circuit is connected to each laser emitter in the at least two laser emission lines through the resistor, one end of the capacitor is connected to a common terminal of the resistor and each laser emitter in the at least two laser emission lines, and the other end of the capacitor is connected to each second switch circuit in the at least two laser emission lines.

The light emitting device according to claim 23, wherein each of the laser emitting circuits comprises a second switch circuit, the second switch circuit comprises a field effect transistor, a first terminal of the second switch circuit is configured to receive the driving signal, a second terminal of the second switch circuit is connected to the capacitor, and a third terminal of the second switch circuit is connected to the resistor.

The light emitting device of claim 24, wherein the laser emitter in each laser emission line is located between the second terminal of the second switching circuit and the capacitor or between the third terminal and the resistor.

The light emitting device according to claim 17, further comprising a first diode, wherein the control circuit comprises a first switch circuit and a second switch circuit, wherein one end of the inductor is connected to the power supply, the other end of the inductor is connected to a third terminal of the first switch circuit, one end of the capacitor is connected to a common terminal of the first diode and each of the at least two laser emitting lines, the other end of the capacitor is connected to each of the second switch circuits of the at least two laser emitting lines, and the second switch circuit comprises a field effect transistor.

The light emitting device according to claim 26, wherein the first terminal of the first switch circuit is configured to receive a driving signal, and the third terminal is connected to ground.

The light emitting device according to claim 26 or 27, comprising a second switch circuit in each laser emitting line, wherein the second switch circuit has a first terminal for receiving a driving signal, a second terminal connected to the capacitor, and a third terminal connected to the inductor.

The light emitting device of claim 28, wherein the laser emitter in each laser emission line is located between the second terminal of the second switching circuit and the capacitor or between the third terminal and the inductor.

The light emitting device of claim 28, wherein the first diode is connected to the inductor at one end and to each of the at least two laser emitting lines at another end.

The light emitting device according to claim 17, further comprising a first diode, wherein the control circuit comprises a third switch circuit, wherein one end of the inductor is connected to the power supply, the other end of the inductor is connected to the capacitor and the common terminal of each of the at least two laser emitting lines through the first diode, one end of the capacitor is connected to the common terminal of each of the first diode and the at least two laser emitting lines, and the other end of the capacitor is connected to each of the third switch circuits of the at least two laser emitting lines.

The light emitting device according to claim 31, wherein the third switch circuit has a first terminal for receiving a driving signal, a second terminal for connecting the capacitor, and a third terminal for connecting the inductor.

The light emitting device of claim 32, wherein the laser emitter in each laser emission line is located between the second terminal of the third switch circuit and the capacitor or between the third terminal and the inductor.

The light emitting device according to claim 17, further comprising a first diode, wherein the control circuit comprises a third switch circuit, wherein the inductor has one end connected to the power supply and the other end connected to a common terminal of each first diode of the at least two laser emission lines, and wherein the capacitor has one end connected to ground and the other end connected to a common terminal of each second diode of the at least two laser emission lines.

The light emitting device of claim 34, wherein each of the at least two laser emission lines includes a first diode, a third switch circuit, a second diode, and a laser emitter.

The light emitting device according to claim 35, wherein in each laser emission line, a first terminal of the third switch circuit is configured to receive a driving signal, a second terminal is connected to ground, and a third terminal is connected to a common terminal of the first diode and the second diode.

A light-emitting device according to any of claims 34-36, wherein the second diode in each laser-emission line is connected in anti-parallel across the laser emitter.

The light-emitting device according to any one of claims 1 to 37, wherein the at least two laser emission lines respectively emit light pulse signals in different directions.

The light emitting device according to any one of claims 1 to 37, wherein the emitting chips of the laser emitters in the at least two laser emitting lines are packaged in the same closed space.

The light emitting device according to any one of claims 1 to 37, further comprising a reset circuit for resetting the tank circuit according to a control signal.

The light emitting device according to claim 40, wherein the tank circuit comprises a capacitor, and the reset circuit comprises a switching circuit for releasing energy stored on the capacitor when conducting.

A light emitting device according to claim 40 or 41, wherein the reset circuit is arranged to reset the voltage across at least part of the circuitry on the tank circuit in response to the control signal before and/or after a light pulse is emitted by the laser emitter.

A light-emitting device according to any one of claims 1 to 42, wherein the parameters of the tank circuits of different lines are different in at least some of the lines.

The light-emitting device according to any one of claims 1 to 43, wherein at least some of the lines have different conduction durations between the tank circuit and the power supply; and/or the conduction time lengths of the energy storage circuit and the laser emitter are different.

A ranging apparatus, comprising:

the light emitting device according to any one of claims 1 to 44, for sequentially emitting laser pulse signals;

at least two detection lines in one-to-one correspondence with the at least two laser emission lines, wherein each detection line includes:

the photoelectric conversion circuit is used for receiving at least part of optical signals reflected by the object from the laser pulse signals emitted by the corresponding laser emission lines and converting the received optical signals into electric signals;

the sampling circuit is used for sampling the electric signal from the photoelectric conversion circuit to obtain a sampling result;

and the arithmetic circuit is used for calculating the distance between the object and the distance measuring device according to the sampling result.

A ranging apparatus as claimed in claim 45 wherein the at least two probing lines share at least part of the sampling circuit; and/or the presence of a gas in the gas,

the at least two probe lines share at least part of the operational circuitry.

A ranging device as claimed in claim 45 or 46 wherein the laser ranging device further comprises a scanning module;

the scanning module is used for changing the transmission direction of the laser pulse signal from the light emitting device and then emitting the laser pulse signal, and the laser pulse signal reflected back by the object enters the detection line after passing through the scanning module.

The range finder device of claim 47, wherein the scanning module comprises a driver and a prism with non-uniform thickness, and the driver is configured to rotate the prism to change the laser pulse signal passing through the prism to exit in different directions.

A ranging device as claimed in claim 48 wherein the scanning module comprises two drivers and two prisms of non-uniform thickness arranged in parallel, the two drivers being adapted to drive the two prisms to rotate in opposite directions;

and laser pulse signals from the laser emitting device sequentially pass through the two prisms and then change the transmission direction to be emitted.

A mobile platform, comprising:

a ranging apparatus as claimed in any of claims 45 to 49; and

the platform body, range unit's light emitting device installs on the platform body.

The mobile platform of claim 50, wherein the mobile platform comprises at least one of an unmanned aerial vehicle, an automobile, and a robot.