CN203224724U

CN203224724U - Pulse laser ranging and timing device based on TDC-GP2 (time distance complexity-GP2)

Info

Publication number: CN203224724U
Application number: CN 201320157074
Authority: CN
Inventors: 刘旭中; 闫斌; 毛锐
Original assignee: Henan Costar Group Co Ltd
Current assignee: Henan Costar Group Co Ltd
Priority date: 2013-04-01
Filing date: 2013-04-01
Publication date: 2013-10-02
Anticipated expiration: 2023-04-01

Abstract

The utility model discloses a pulse laser ranging and timing device based on TDC-GP2 (time distance complexity-GP2). The pulse laser ranging and timing device comprises a time digital converter, a CPU (central processing unit) control circuit and a communication transmission circuit, wherein the time digital converter utilizes a TDC-GP2 chip, the CPU control circuit utilizes a C8051F330 single chip microcomputer, the EN-START port and the EN-STOP1 port of the TDC-GP2 chip are respectively connected with the P1.1 port and the P1.0 port of the C8051F330 single chip microcomputer, and the SSN port, the SCK port, the SI port, the SO port, the RSTN port and the ININ port of the TDC-GP2 chip are respectively connected with the P0.0 port, P0.1 port, the P0.2 port, the P0.3 port, the P0.7 port and the P0.6 port of the C8051F330 single chip microcomputer; and the communication transmission circuit utilizes the RS232 chip, and the TIIN port and the R1OUT port of the RS232 chip are respectively connected with the P0.4 port and the P0.5 port of the C8051F330 single chip microcomputer. The pulse laser ranging and timing device disclosed by the utility model has the advantages that the typical measurement resolution ratio can reach 50psrms, the power consumption is ultralow, the integration degree is high, and the measurement flexibility is high; and the pulse laser ranging and timing device is the ideal selection for pulse laser ranging and time difference measurement.

Description

Pulsed laser ranging time set based on TDC-GP2

Technical field

The utility model belongs to the laser ranging technical field of electronic products, is specifically related to a kind of pulsed laser ranging time set based on TDC-GP2.

Background technology

Laser ranging generally adopts dual mode to come measuring distance: impulse method and phase method.The pulse type laser stadimeter is to calculate distance by measuring laser from the time that is transmitted between returning.Therefore time measurement is very important for the pulse type laser stadimeter.Because the speed of laser is fast especially, so the time interval between the laser pulse that transmits and receives is very little.The time-to-digit converter TDC-GP2 that the design adopts is desirable selection of pulse type laser range finding time difference measurement.

Summary of the invention

For solving the above-mentioned defective that prior art exists, the purpose of this utility model is to provide a kind of typical Measurement Resolution can reach 50ps rms, and power consumption is ultralow, and the integrated level height is measured the high pulsed laser ranging time set based on TDC-GP2 of dirigibility.

For achieving the above object, the technical solution adopted in the utility model: should be based on the pulsed laser ranging time set of TDC-GP2, has time-to-digit converter, cpu control circuit and communication transmission circuit, it is characterized in that: described time-to-digit converter adopts the TDC-GP2 chip, described cpu control circuit adopts the C8051F330 single-chip microcomputer, the START port of described TDC-GP2 chip receives the transponder pulse signal, the STOP1 port of described TDC-GP2 chip receives the Stop signal that photodetector produces, the EN-START of described TDC-GP2 chip, the EN-STOP1 port connects the P1.1 of C8051F330 single-chip microcomputer respectively, the P1.0 port, the SSN of described TDC-GP2 chip, SCK, SI, SO, RSTN and ININ port respectively with the P0.0 of C8051F330 single-chip microcomputer, P0.1, P0.2, P0.3, P0.7 is connected with the P0.6 port; The communication transmission circuit adopts the RS232 chip, and the TIIN of described RS232 chip, R1OUT port are connected with the P0.5 port with the P0.4 of C8051F330 single-chip microcomputer respectively.

Adopt the beneficial effect of technique scheme: when laser beam emitting device is launched laser pulse, simultaneously transponder pulse is input to the start port of TDC-GP2 chip based on the pulsed laser ranging time set of TDC-GP2, triggers time difference measurement; Produce a Stop signal in case the reflected impulse of passing back from object has reached photodetector (receiving circuit) to TDC, this time, time difference measurement was finished.Accurately noted by the TDC-GP2 chip from Start to the time difference the Stop pulse, be used for to calculate the distance of the object of surveying and transmitting terminal.The C8051F330 single-chip microcomputer carries out register configuration and time measurement control for TDC-GP2, and reads the time measurement result carries out distance by algorithm accurate Calculation.DTC-GP2 has two kinds of measurement ranges, and the range of measurement range 1 is 0～1.8us, is approximately 0～270m with respect to distance; The range of measurement range 2 is 500ns～4ms, is approximately 75m～25Km with respect to distance; Therefore may satisfy the demand in the actual design.The time-to-digit converter TDC-GP2 that the utility model adopts, typical Measurement Resolution can reach 50ps rms, and power consumption is ultralow, and the integrated level height is measured the dirigibility height, is that the ideal of pulse type laser range finding time difference measurement is selected.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is TDC-GP2 chip configuration circuit diagram.

Fig. 2 is cpu control circuit figure.

Fig. 3 is communication transmission circuit figure.

Fig. 4 is CPU control workflow.

Embodiment

As Fig. 1,2, the pulsed laser ranging time set based on TDC-GP2 shown in 3, has time-to-digit converter, cpu control circuit and communication transmission circuit, described time-to-digit converter adopts the TDC-GP2 chip, described cpu control circuit adopts the dragon C8051F330 of Xinhua single-chip microcomputer, the START port of described TDC-GP2 chip receives the transponder pulse signal, the STOP1 port of described TDC-GP2 chip receives the Stop signal that photodetector produces, the EN-START of described TDC-GP2 chip, the EN-STOP1 port connects the P1.1 of C8051F330 single-chip microcomputer respectively, the P1.0 port, the SSN of described TDC-GP2 chip, SCK, SI, SO, RSTN and ININ port respectively with the P0.0 of C8051F330 single-chip microcomputer, P0.1, P0.2, P0.3, P0.7 is connected with the P0.6 port; The communication transmission circuit adopts the RS232 chip, and the TIIN of described RS232 chip, R1OUT port are connected with the P0.5 port with the P0.4 of C8051F330 single-chip microcomputer respectively.

START in the TDC-GP2 chip configuration circuit and STOP port connect time interval AZ signal (sampling and echoed signal), the C8051F330 single-chip microcomputer is to EN_ST ART and EN_ STOP port controlling, can enable control to START and STOP port, avoid the false triggering or the control range hole that are brought by external disturbance.The INTN port is the timing end signal, and low level is effective, connects the C8051F330 single-chip microcomputer, and the sign that reads timing result is provided; RSET is the reset signal of TDC-GP2, and low level is effective, is resetted by Single-chip Controlling TDC-GP2.SSN, SCK, SI, SO are the SPI bus port, are connected on the SPI port of CPU, realize the register configuration initialization reading writing working of the TDC-GP2 of CPU.

CPU control and communication transmission circuit are finished the setting of TDC-GP2 mode of operation and the control of timework, can also communicate transmission steering order and chronometric data simultaneously by serial port and PC.Xinhua dragon C8051F330 single-chip microcomputer adopts 2.7～3.6V power voltage supply, has powerful CPU core, and I/O can be configured, strengthened port function and dirigibility, improved the development ability to peripherals.The C8051F330 single-chip microcomputer is mainly realized following function:

Realize and TDC-GP2 timing chip SPI interface communication that (1) control register of configuration TDC-GP2 reads chronometric data in real time;

(2) judge control command, realize functions such as register setting, measurement pattern judgement;

(3) control survey workflow, the conversion chronometric data is range data;

Realize and the serial communication of PC, receive control command and upload measurement data.

Claims

1. pulsed laser ranging time set based on TDC-GP2, has time-to-digit converter, cpu control circuit and communication transmission circuit, it is characterized in that: described time-to-digit converter adopts the TDC-GP2 chip, described cpu control circuit adopts the C8051F330 single-chip microcomputer, the START port of described TDC-GP2 chip receives the transponder pulse signal, the STOP1 port of described TDC-GP2 chip receives the Stop signal that photodetector produces, the EN-START of described TDC-GP2 chip, the EN-STOP1 port connects the P1.1 of C8051F330 single-chip microcomputer respectively, the P1.0 port, the SSN of described TDC-GP2 chip, SCK, SI, SO, RSTN and ININ port respectively with the P0.0 of C8051F330 single-chip microcomputer, P0.1, P0.2, P0.3, P0.7 is connected with the P0.6 port; The communication transmission circuit adopts the RS232 chip, and the TIIN of described RS232 chip, R1OUT port are connected with the P0.5 port with the P0.4 of C8051F330 single-chip microcomputer respectively.