CN207263132U - GPS Laser Measuring mu instrument - Google Patents
GPS Laser Measuring mu instrument Download PDFInfo
- Publication number
- CN207263132U CN207263132U CN201720809541.8U CN201720809541U CN207263132U CN 207263132 U CN207263132 U CN 207263132U CN 201720809541 U CN201720809541 U CN 201720809541U CN 207263132 U CN207263132 U CN 207263132U
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- circuit
- gps
- mtk
- systems
- instrument
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- Optical Radar Systems And Details Thereof (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
It the utility model is related to a kind of GPS Laser Measurings mu instrument, including the power supply of control mainboard, display circuit, GPS circuitry, laser ranging circuit, power supply and management circuit, key circuit；Laser ranging circuit is connected with control mainboard, and carries out laser ranging with phase method under control mainboard control, and is provided with a variety of modulation frequencies, goes out single distance value with COMPREHENSIVE CALCULATING；GPS circuitry receives GPS radio-frequency signal, and positional information is sent to control mainboard, control mainboard control display circuit and shows related data；Power supply is powered and management circuit has battery, for providing power supply to control mainboard and each circuit module.The GPS surveys mu instrument and with the addition of laser ranging circuit, using ranging phase method technology, can indoors measure, can also measure air line distance, and small area measurement accuracy is brought up to a millimeter rank.The GPS Laser Measurings mu instrument is simple in structure, and high certainty of measurement, meets the measurement request under a variety of environment.
Description
Technical field
It the utility model is related to electro-optical distance measurement field, and in particular to GPS Laser Measuring mu instrument.
Background technology
With advances in technology and development, people adjust the distance measurement requirement it is higher and higher, it is existing survey mu instrument all adopt
Navigation and the location informations such as real-time longitude, latitude, elevation are provided with GPS GPSs, utilizes the positioning of GPS
Function, draws the coordinate of each point, then calculates the data such as distance, area by mathematical method.But such measuring method pair
Measurement accuracy in small area soil (being less than 1 mu) is not high, and error is larger.For some air line distances, when being needed with GPS measurements
Between it is long and cumbersome, and GPS positioning system is easily disturbed.When measuring indoor distances, GPS positioning can not be used.
Utility model content
In view of this, it is necessary to which a kind of GPS Laser Measuring mu instrument that can realize indoor measurement and high certainty of measurement is provided.
A kind of GPS Laser Measurings mu instrument, including the power supply of control mainboard, display circuit, GPS circuitry, laser ranging circuit, power supply
With management circuit, key circuit；The laser ranging circuit is connected with the control mainboard, and under control mainboard control
Laser ranging is carried out with phase method, the laser ranging circuit presets put a variety of modulation frequencies, go out single distance with COMPREHENSIVE CALCULATING
Value；The GPS circuitry is used to receive GPS radio-frequency signal, and positional information is sent to the control mainboard, the control mainboard control
Make the display circuit and show related data；The power supply power supply and management circuit have battery, for the control mainboard
Power supply is provided with each circuit module.
Further, the control mainboard is MTK systems, the MTK systems include microcontroller and with each circuit mould
The input/output control circuit of block connection, the microcontroller are controlled for the MTK systems, and the input of the MTK systems is defeated
Go out the interface circuit that control circuit includes being connected with each circuit module, for controlling each circuit module.
Further, the laser ranging circuit is connected to the MTK systems, and the distance value measured is sent to described
MTK systems.
Further, the display circuit has display screen, and the MTK systems have display control circuit, the display
Circuit is connected with the display control circuit of the MTK systems, for showing word, picture, digital information.
Further, the GPS circuitry includes antenna element and receiving unit, the antenna element include reception antenna,
Wave filter and low noise amplifier, the receiving unit include signalling channel unit, clock crystal oscillator, GPS crystal vibration
Device, receiver processor, the receiving unit complete the down coversion and analog-to-digital conversion process of GPS radio-frequency signal, and by after processing
Signal send to the MTK systems.
Further, the power supply power supply and management module are connected to the MTK systems, the power supply power supply and management electricity
Road has battery, and the power management module of the MTK systems is used for the voltage and temperature for detecting the battery in real time, carries out overvoltage
Protection and under-voltage protection.
Further, the key circuit is used for human-computer interaction interface input operation, and the key circuit is connected to described
MTK systems, the MTK systems are used to receiving after the key information of the key circuit and judge keying input information, and control
The display circuit is shown and speech play corresponding operating information.
Further, power amplifier is further included, the power amplifier is played for real-time voice, and the power amplifier has
Loudspeaker, the power amplifier are connected to the MTK systems, after the soft decoding audio signal of MTK systems, by the power amplifier
Circuit amplifies audio signal and plays voice messaging.
Further, SD card circuit is further included, the MTK systems have SD interface, and the SD card circuit, which is used to store, to be used
Family information, is connected with the SD interface of the MTK systems.
Further, LED circuit is further included, the LED circuit includes illuminating LED lamp and money-checking LED light, pressed by described
Key circuit inputs information, controls corresponding LED light to operate by the MTK systems.
In above-mentioned GPS Laser Measurings mu instrument, the laser ranging circuit is with the addition of on the basis of GPS surveys mu instrument, it is described to swash
Ligh-ranging circuit uses ranging phase method technology, can measure indoors, can also measure air line distance, and small area is measured
Precision brings up to a millimeter rank.The GPS Laser Measurings mu instrument is simple in structure, and high certainty of measurement, meets the measurement under a variety of environment
It is required that.
Brief description of the drawings
Fig. 1 is the GPS Laser Measuring mu instrument modular structure schematic diagrams of the utility model embodiment；
Fig. 2 is the laser distance measuring principle figure of the GPS Laser Measuring mu instrument of the utility model embodiment；
Fig. 3 is the GPS circuitry figure of the GPS Laser Measuring mu instrument of the utility model embodiment；
Fig. 4 is the laser ranging circuit diagram of the GPS Laser Measuring mu instrument of the utility model embodiment；
Fig. 5 is the power amplifier figure of the GPS Laser Measuring mu instrument of the utility model embodiment；
Fig. 6 is the LED circuit diagram of the GPS Laser Measuring mu instrument of the utility model embodiment.
Embodiment
The utility model is described in detail below with reference to specific embodiments and the drawings.
Please refer to Fig.1 to Fig. 6, a kind of GPS Laser Measurings mu instrument, including control mainboard 11, display circuit, GPS circuitry are shown
12nd, laser ranging circuit 13, power supply power supply and management circuit 14, key circuit 15, power amplifier 16, LED circuit 17, SD card
Circuit；The laser ranging circuit 13 is connected with the control mainboard 11, and uses phase method under the control mainboard 11 control
Laser ranging is carried out, the laser ranging circuit 13 pre-sets a variety of modulation frequencies, goes out single distance value with COMPREHENSIVE CALCULATING；It is described
GPS circuitry 12 is used to receive GPS radio-frequency signal, and positional information is sent to the control mainboard 11, the control mainboard 11 and is controlled
Make the display circuit and show related data；The power supply power supply and management circuit 14 have battery, for the control master
Plate 11 and each circuit module provide power supply.
In the present embodiment, the control mainboard 11 is MTK systems 11, the MTK systems 11 include microcontroller and with
The input/output control circuit of each circuit module connection, the microcontroller are controlled for the MTK systems 11, the MTK systems
The input/output control circuit of system 11 includes the interface circuit being connected with each function module, for controlling each circuit mould
Block.Many mobile phones use MTK systems at present, the control mainboard of the present embodiment will the system be diverted to survey mu instrument.
As shown in figure 3, the GPS circuitry 12 includes antenna element 121 and receiving unit 122, the antenna element 121
Including reception antenna 1211, wave filter 1212 and low noise amplifier 1213, the receiving unit 122 includes signalling channel unit
1221st, clock crystal oscillator 1222, GPS crystal oscillator 1223, receiver processor 1224, the receiving unit 122 are complete
Sent into the down coversion and analog-to-digital conversion process of GPS radio-frequency signal, and by the signal after processing to the MTK systems 11.
As shown in figure 4, the laser ranging circuit 13 has multiple USB interfaces, the laser ranging circuit 13 passes through USB
Interface is connected to the MTK systems 11, and the distance value measured is sent to the MTK systems 11.The display circuit has aobvious
Display screen, the MTK systems 11 have the display control of display control circuit, the display circuit and the MTK systems 11
Circuit connects, for showing word, picture, digital information.
The power supply power supply and management module 14 are connected to the MTK systems 11, the power supply power supply and management circuit 14
With battery, the power management module of the MTK systems 11 is used for the voltage and temperature for detecting the battery in real time, carries out overvoltage
Protection and under-voltage protection.
The key circuit 15 is used for human-computer interaction interface input operation, and the key circuit 15 is connected to the MTK systems
System 11, the MTK systems 11 are used to receiving after the key information of the key circuit 15 and judge keying input information, and control
The display circuit is made to show and speech play corresponding operating information.The key circuit 15 is using conventional key circuit.
As shown in figure 5, the power amplifier 16 is played for real-time voice, the power amplifier 16 has loudspeaker, institute
State power amplifier 16 and be connected to the MTK systems 11, after the soft decoding audio signal of MTK systems 11, by power amplifier electricity
Amplify audio signal and play voice messaging in road 16.
The MTK systems 11 have SD interface, and the SD card circuit is used to store user information, with the MTK systems 11
The SD interface connection.
As shown in fig. 6, the LED circuit 17 includes illuminating LED lamp and money-checking LED light, inputted by the key circuit
Information, controls corresponding LED light to operate by the MTK systems 11.
The measuring method of a modulation frequency is as follows in the present embodiment：
After ranging starts, after being modulated with the sinusoidal signal that modulation frequency is f to the laser of required transmitting, after modulation
Laser signal launch to measured target；
By target surface reflect echo optical signal received by laser ranging circuit, and be photoelectrically converted circuit conversion into
Electric signal；
After the filtered device filtering of electric signal, the reception signal for only retaining frequency modulating signal component is obtained；
Signal before transmitting and the signal received input are surveyed into circuitry phase, compare the phase difference of two signals；
According to known phase difference, it is that whole number of phases calculates gained plus definite phase shift to calculate testing distance d
The mantissa value of insufficient complete cycle.
Laser distance measuring principle is as follows：
If the speed that light is propagated in atmosphere is c, two-way time and distance relation are between 2 points of A, B：
D=(1/2) ct. ... ... ... ... ... (1)
From (1) formula, range measurement is converted into time measurement, and due to inaccurate to time measurement, so the time
Measurement is converted into can reach very high precision to phase measurement, phase measurement.
If the frequency of carrier wave is the modulation light of f, two-way time t, phase shift is as shown in Figure 2 for Φ waveforms：
Being located at the modulation light light intensity that initial time t1 launches is：
I1=Asin (wt1+ Φ 0) ... ... ... ... ... .. (2)
The modulation light light intensity of time of reception t2 is：I2=Asin (wt1+wt2+ Φ 0) ... ... ... ... (3)
From (2) (3), the phase difference Φ of emission time and the time of reception：Φ=wt=2 π ft ... ... (4)
Understand that the time difference is by (4)：T=Φ/(2 π f) ... ... ... ... ... ... ... .. (5)
(5) for people (1) formula：
D=(1/2) ct=(c/2) * [Φ/(2 π f)]=(l/2) [N+ (△ Φ/2 π)]=Ls (N+ △ N) ... ... ...
(6)
In formula (6), l=c/f, Ls=l/2, N are whole wave number, and △ N are the mantissa of the whole wave number of deficiency, and Ls is the length of measurement ruler
Degree.
The method of any measurement alternating signal phase shift cannot all survey the whole number of phases that note is passed through at present, i.e., can not determine
The integral multiple N of 2 π included in phase shift φ, and can only determine the mantissa value Δ φ of insufficient 2 π complete cycle, when distance to be measured compared with
When long, in order to both ensure required range accuracy, several different modulation frequencies, i.e. phase can be set in laser ranging circuit
, different, the minimum scale unit of length also different ruler, measure certain segment distance at the same time with them when in there is provided several, then will
The result each surveyed combines, so that it may obtains single, accurate distance value.
In above-mentioned GPS Laser Measurings mu instrument, the laser ranging circuit 13 uses ranging phase method technology, can survey indoors
Amount, can also measure air line distance, and small area measurement accuracy is brought up to a millimeter rank.The GPS Laser Measurings mu instrument structure
Simply, high certainty of measurement, meets the measurement request under a variety of environment, and the value and user experience of bigger, this reality are brought to user
Simple with new structure, assembly technology is easy, of low cost, easy to promote.
It should be noted that the utility model is not limited to the above embodiment, it is according to the present utility model to create essence
God, those skilled in the art can also make other changes, these changes done according to the creative spirit of the utility model, all
Should be within the scope of the utility model be claimed.
Claims (10)
1. a kind of GPS Laser Measurings mu instrument, it is characterised in that including control mainboard, display circuit, GPS circuitry, laser ranging electricity
Road, power supply power supply and management circuit, key circuit；The laser ranging circuit is connected with the control mainboard, and in the control
Laser ranging is carried out with phase method under mainboard control processed, the laser ranging circuit presets put a variety of modulation frequencies, in terms of comprehensive
Calculate single distance value；The GPS circuitry is used to receive GPS radio-frequency signal, and positional information is sent to the control mainboard, institute
Stating control mainboard controls the display circuit to show related data；Power supply power supply and management circuit have battery, for
The control mainboard and each circuit module provide power supply.
2. GPS Laser Measurings mu instrument as claimed in claim 1, it is characterised in that the control mainboard is MTK systems, the MTK
System includes microcontroller and the input/output control circuit being connected with each circuit module, and the microcontroller is used for described
MTK systems control, and the input/output control circuit of the MTK systems includes the interface circuit being connected with each circuit module,
For controlling each circuit module.
3. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that the laser ranging circuit is connected to the MTK
System, the distance value measured is sent to the MTK systems.
4. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that the display circuit has display screen, described
MTK systems have display control circuit, and the display circuit is connected with the display control circuit of the MTK systems, is used for
Show word, picture, digital information.
5. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that the GPS circuitry includes antenna element and reception
Unit, the antenna element include reception antenna, wave filter and low noise amplifier, and the receiving unit includes signalling channel list
Member, clock crystal oscillator, GPS crystal oscillator, receiver processor, the receiving unit are completed under GPS radio-frequency signal
Frequency conversion and analog-to-digital conversion process, and the signal after processing is sent to the MTK systems.
6. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that the power supply power supply and management module are connected to
The MTK systems, the power supply power supply and management circuit have battery, and the power management module of the MTK systems is used in real time
The voltage and temperature of the battery are detected, carries out overvoltage protection and under-voltage protection.
7. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that the key circuit is used for human-computer interaction interface
Input operation, the key circuit are connected to the MTK systems, and the MTK systems are used for the button for receiving the key circuit
After information and judge keying input information, and control the display circuit to show and speech play corresponding operating information.
8. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that further include power amplifier, the power amplifier is used
Played in real-time voice, the power amplifier has loudspeaker, and the power amplifier is connected to the MTK systems, the MTK systems
Unite after soft decoding audio signal, amplify audio signal by the power amplifier and play voice messaging.
9. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that further include SD card circuit, the MTK systems tool
There is SD interface, the SD card circuit is used to store user information, is connected with the SD interface of the MTK systems.
10. GPS Laser Measurings mu instrument as claimed in claim 2, it is characterised in that further include LED circuit, the LED circuit bag
Illuminating LED lamp and money-checking LED light are included, information is inputted by the key circuit, corresponding LED light is controlled by the MTK systems
Operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720809541.8U CN207263132U (en) | 2017-07-06 | 2017-07-06 | GPS Laser Measuring mu instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720809541.8U CN207263132U (en) | 2017-07-06 | 2017-07-06 | GPS Laser Measuring mu instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207263132U true CN207263132U (en) | 2018-04-20 |
Family
ID=61926515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720809541.8U Expired - Fee Related CN207263132U (en) | 2017-07-06 | 2017-07-06 | GPS Laser Measuring mu instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207263132U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729173A (en) * | 2020-12-21 | 2021-04-30 | 成都网感科技有限公司 | Intelligent handheld measuring instrument |
-
2017
- 2017-07-06 CN CN201720809541.8U patent/CN207263132U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729173A (en) * | 2020-12-21 | 2021-04-30 | 成都网感科技有限公司 | Intelligent handheld measuring instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20190706 |