CN2824062Y

CN2824062Y - Pulse signal control GPS signal and digital signal composite circuit

Info

Publication number: CN2824062Y
Application number: CNU2005200980947U
Authority: CN
Inventors: 林宗桂; 孙涵; 林墨; 马瑞升; 张行清
Original assignee: GUANGXI INSTITUTE OF METEOROLOGICAL DISASTER MITIGATION
Current assignee: GUANGXI INSTITUTE OF METEOROLOGICAL DISASTER MITIGATION
Priority date: 2005-09-15
Filing date: 2005-09-15
Publication date: 2006-10-04
Anticipated expiration: 2015-09-15

Abstract

The utility model relates to a pulse signal control GPS signal and digital signal composite circuit; positioning signals of a GPS receiving module (module 1) are sent out directly to a switching input end of an analog switch (IC3), and composite digital signals are connected to the other switching input end of the analog switch (IC3); pulse per second signals sent by the GPS receiving module (module 1) are divided into two paths to send to two input ends of an inverter integrated circuit (IC2); the two output end of the inverter integrated circuit (IC2) are respectively connected to two on-off control ends of a control simulation switch (IC3). The utility model simplifies the composite circuit construction of the GPS signals and the digital signals, reduces apparatus manufacture cost, and bit error rate of the composite signals, and enhances the operational reliability of an apparatus. The utility model is favorable for giving a full play to popularization and application of a GPS high-accuracy positioning technology in atmospheric sounding, and can be arranged on sondes with various purposes and apparatus which carry out GPS positioning.

Description

Pulse signal control gps signal and the compound circuit of digital signal

Technical field

The utility model relates to a kind of pulse signal control gps signal and the compound circuit of digital signal, controls gps signal and the compound circuit of digital signal especially for the pulse signal on the sounding instrument that is equipped in various atmospheric explorations.

Background technology

Use the sounding instrument of GPS location at present, as its gps signal and digital multiplexed signal are unified two kinds of modes are arranged, the one, employing is replied the conversion of instruction control on-off circuit and is carried out compound; The 2nd, adopt train of signal to detect the afterbody addition manner and carry out compound.These two kinds of signal complex methods all have the circuit complexity, are easy to generate error code and the high shortcoming of cost, have influence on to use the sounding instrument of GPS location to apply.

Summary of the invention

The technical problems to be solved in the utility model is to provide simple, the difficult generation error code of a kind of circuit, pulse signal control gps signal and the compound circuit of digital signal that cost of manufacture is low for the sounding instrument.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: the positioning signal of GPS receiver module (Module 1) directly outputs to the switch input terminal of analog switch (IC3); Required compound digital signal is connected to another switch input terminal of analog switch (IC3); Two input ends that the pps pulse per second signal of GPS receiver module (Module 1) output divides two-way to be passed to inverter circuit (IC2), two output terminals of inverter circuit (IC2) are connected respectively to two switch control ends of control analog switch (IC3).

The beneficial effects of the utility model are, simplified the compound circuit structure of gps signal and digital signal, the lowering apparatus cost of manufacture reduces the composite signal bit error rate, improve the instrument functional reliability, help giving full play to GPS hi-Fix technology applying in atmospheric exploration.Can be equipped on the sonde and the instrument that uses the GPS location of various uses.

Description of drawings

Fig. 1 is a circuit diagram of the present utility model.

Fig. 2 is a Single Chip Microcomputer (SCM) program process flow diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is further specified:

Among Fig. 1, Module 1 is the GPS receiver module, and IC2 is an inverter circuit, and IC3 is an analog switching ic, and IC1 is the single-chip microcomputer integrated circuit, and IC4 is RS-232 and Transistor-Transistor Logic level converter ic, and Module 2 is the single bus sensor module.

In the present embodiment, receive the GPS positioning signal with GPS receiver module Module 1; Gather environmental variance and convert digital signal output to single bus sensor module Module 2; Receive the digital signal that processing single bus sensor module is sent here with single-chip microcomputer integrated circuit (IC) 1; Do RS-232 and Transistor-Transistor Logic level conversion with signal level converter ic IC4; Compound with the conversion of analog switching ic IC3 gauge tap with signal.The circuit working principle is: the GPS receiver module receives that positioning signal is input to analog switching ic IC3; Single bus sensor module Module 2 directly is sent to single-chip microcomputer receiving port Q1 with signal; Program in the single-chip microcomputer integrated circuit is finished the signal Processing that the single bus sensor module is sent here, is passed to signal level converter ic IC4 then and carries out TTL and RS-232 level conversion, is passed to analog switching ic IC3 again; Two input end P1, P2 that the pps pulse per second signal of GPS receiver module output divides two-way to be passed to inverter circuit IC2, one of them is homophase output, another is anti-phase output.When pulse per second (PPS) is high level, K switch 1 closure of analog switching ic, K2 disconnects, the output gps signal; When pulse per second (PPS) was low level, K switch 1 disconnected, K2 closure, output digital signal.High and low level length by suitable adjusting pps pulse per second signal just can realize the compound output of gps signal and digital signal.

In circuit shown in Figure 1, the concrete course of work is: the GPS positioning signal of RS-232 level is passed to T3 from M1, exports to T4, T7 through K1; Pps pulse per second signal is passed to P1 and P2 respectively from M2, and closure and disconnection by P3 is passed to T1 control K1 are passed to closure and the disconnection of T2 control K2 by P4; The digital signal of Transistor-Transistor Logic level is passed to Q1 by N1, is passed to R1 by Tx after Single Chip Microcomputer (SCM) program is handled, and is passed to T6 by R2 after TTL and 4 conversions of RS-232 level conversion integrated circuit (IC), exports to T5, T7 through K2.

In program circuit shown in Figure 2, at first send out reset command, then send out the reading of data order, carry out read operation and CRC check subsequently, when byte has run through and checked correctly through CRC, then data are moved into internal memory, enter the next round circulation after then data being sent.

Claims

1. a pulse signal is controlled gps signal and the compound circuit of digital signal, and it is characterized in that: the positioning signal of GPS receiver module (Module1) directly outputs to the switch input terminal of analog switch (IC3); Required compound digital signal is connected to another switch input terminal of analog switch (IC3); Two input ends that the pps pulse per second signal of GPS receiver module (Module 1) output divides two-way to be passed to inverter circuit (IC2), two output terminals of inverter circuit (IC2) are connected respectively to two switch control ends of control analog switch (IC3).