# US 2019/0317192 A1 · Laser detection and ranging device

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- Number: US 2019/0317192 A1
- Document ID: US20190317192A1
- Status: Published application
- Kind: A1
- Application number: 16/447,950
- Filed: 2019-06-20
- Published: 2019-10-17
- Earliest claimed: 2016-12-22
- Assignees: Leishen Intelligent System Co., Ltd.
- Applicants: Leishen Intelligent System Co. Ltd.
- Inventors: Yong WANG; Peihua DUAN; Xiaobo HU
- Web page: https://patentgrep.com/patent/US20190317192A1

## CPC

- G01S 7/4811: {common to transmitter and receiver}
- H01F 38/14: Inductive couplings
- G01S 7/003: {Transmission of data between radar, sonar or lidar systems and remote stations}
- G01S 7/4813: {Housing arrangements}
- G01S 7/4817: {relating to scanning}
- G01S 7/484: Transmitters
- G01S 7/4865: Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak (peak detection in noise, signal conditioning G01S7/487)
- G01S 17/04: Systems determining the presence of a target
- G01S 17/10: using transmission of interrupted, pulse-modulated waves (determination of distance by phase measurements G01S17/32)
- G01S 17/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46)
- H01F 27/24: Magnetic cores
- H02J 50/10: using inductive coupling
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

## Abstract

A LADAR device, including: a rangefinder; a signal transmission module; a power transmission module; a mechanical rotating part; a housing; a signal processing board; and a timing module. The signal transmission module includes at least one optical communication transmitter and one optical communication receiver. The power transmission module includes coupled magnet rings and communicates with the signal transmission module through electromagnetic induction to achieve wireless power transmission. The mechanical rotating part is adapted to drive the rangefinder to rotate axially in 360 degrees. The rangefinder is disposed on the housing, and includes a laser, an emitting lens assembly, a receiving sensor, and a receiving lens. The emitting lens assembly includes a first accommodation space and the laser is disposed in the first accommodation space. The receiving lens includes a second accommodation space and the receiving sensor is disposed in the second accommodation space.

## Claims

### Claim 1

A LADAR device, comprising:
a rangefinder;
a signal transmission module;
a power transmission module;
a mechanical rotating part;
a housing;
a signal processing board; and
a timing module;
wherein:
the signal transmission module comprises at least one optical communication transmitter and one optical communication receiver corresponding to the one optical communication transmitter;
the power transmission module comprises coupled magnet rings, and communicates with the signal transmission module through electromagnetic induction to achieve wireless power transmission;
the mechanical rotating part is adapted to drive the rangefinder to rotate axially in 360 degrees;
the rangefinder is disposed on the housing, and comprises a laser, an emitting lens assembly, a receiving sensor, and a receiving lens; the emitting lens assembly comprises a first accommodation space and the laser is disposed in the first accommodation space; the receiving lens comprises a second accommodation space and the receiving sensor is disposed in the second accommodation space;
the at least one optical communication transmitter and one optical communication receiver corresponding to the one optical communication transmitter are disposed in a middle part of the housing;
the mechanical rotating part comprises a built-in hollow-shaft motor;
the housing comprises a first part, a second part, and a third part, and the second part is disposed between the first part and the third part;
the built-in hollow-shaft motor is flexibly connected to the first part of the housing via a belt, and is adapted to drive the first part and the second part of the housing to rotate via the belt;
the power transmission module comprises an upper part and a lower part;
the upper part is disposed in the second part of the housing and adapts to rotate axially in 360 degrees; and the lower part is fixed on the third part of the housing;
the rangefinder is a time-of-flight laser ranging module; and
when in use, the signal processing board adapts to produce a pulse signal;
an optical signal is transmitted from the optical communication transmitter to the optical communication receiver; the timing module adapts to receive the pulse signal as a timing start signal, receive a timing termination signal from the receiving sensor, and calculate a time of flight of the optical signal according to the timing start signal and the timing termination signal.

### Claim 2 (depends on 1)

The device of claim 1, wherein the signal transmission module comprises: a first optical communication transmitter and a first optical communication receiver corresponding to the first optical communication transmitter, and a second optical communication transmitter and a second optical communication receiver corresponding to the second optical communication transmitter, to achieve a full-duplex communication mode or a half-duplex communication mode.

### Claim 3 (depends on 2)

The device of claim 2, wherein emitted optical signals of the first optical communication transmitter and received optical signals of the first optical communication receiver are in the same waveband; emitted optical signals of the second optical communication transmitter and received optical signals of the second optical communication receiver are in the same waveband; and emitted optical signals of the first/second optical communication transmitter and received optical signals of the second/first optical communication receiver are in different wavebands.

### Claim 4 (depends on 1)

The device of claim 1, wherein the signal transmission module comprises one optical communication transmitter and one optical communication receiver corresponding to the one optical communication transmitter, to achieve a simplex communication mode.

### Claim 5 (depends on 1)

The device of claim 1, wherein the optical communication transmitter and the optical communication receiver are diodes.

### Claim 6 (depends on 1)

A method of using the LADAR device of claim 1, the method comprising:
1) generating, by the signal processing board, a pulse signal;
2) generating, by the laser, which is excited by the pulse signal, a pulse laser light, which is used as a timing start signal, and emitting, by the emitting lens assembly, the pulse laser light;
3) receiving, by the receiving lens, a reflected laser light from a target object, and focusing, by the receiving lens, the reflected laser light on the receiving sensor;
4) producing, by the receiving sensor, a timing termination signal, and transmitting the timing termination signal, by the receiving sensor, to the timing module;
5) calculating, by the timing module, a time of flight of the laser light, and calculating distance data of the target object according to the time of flight of the laser light; and
6) combining the distance data and azimuth information acquired by a photoelectric switch, to yield position information of the target object.