CN201514211U - Wireless tilt angle sensor - Google Patents
Wireless tilt angle sensor Download PDFInfo
- Publication number
- CN201514211U CN201514211U CN2009200721118U CN200920072111U CN201514211U CN 201514211 U CN201514211 U CN 201514211U CN 2009200721118 U CN2009200721118 U CN 2009200721118U CN 200920072111 U CN200920072111 U CN 200920072111U CN 201514211 U CN201514211 U CN 201514211U
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- angle
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- wireless tilt
- module
- angle signal
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Abstract
The utility model relates to a wireless tilt angle senor; an angle sensor is connected with a radio-frequency transmitting module and arranged on an object to be measured; after the angle sensor picks up the tilt angle data, the radio-frequency transmitting module sends an angle signal out by an antenna; and a radio-frequency receiving module receives the angle signal and uploads the angle signal by an RS232 data line. The wireless tilt angle sensor solves the problem of difficult field wiring in measurement, and facilitates the storage and management of data, and leads to the convenient replacement of elements due to modularized design.
Description
Technical field
The utility model relates to a kind of measuring technique, the wireless measurement sensor at particularly a kind of civil construction thing angle of inclination.
Background technology
At the special occasions that personnel such as poisonous, nuclear radiation, geologic hazard Yi Fa should not enter, need sometimes the angle of inclination of bridge facility, high building building (particularly dangerous building) is monitored.If adopt traditional wired angular transducer, then can bring practical problemss such as field wiring difficulty.
Summary of the invention
The utility model is the problems of measurement that is not suitable for complex-terrain at present wired obliquity sensor, has proposed a kind of wireless tilt sensor, realizes high building, the angle of inclination wireless measurement of civil structures such as bridge.
The technical solution of the utility model is: a kind of wireless tilt sensor, comprise angular transducer, radiofrequency emitting module and Receiver Module, angular transducer is connected with radiofrequency emitting module, be installed on the testee, after angular transducer picks up the angle of inclination data, radiofrequency emitting module is launched angle signal by antenna, Receiver Module receiving angle signal, and upload angle signal by the RS232 data line.
Described radiofrequency emitting module and Receiver Module are selected the nRF9E5 chip for use, and the nRF9E5 radio receiving transmitting module is connected by slot with wireless tilt sensor mainboard.
The beneficial effects of the utility model are: the utility model wireless tilt sensor, and solve the problem of field wiring difficulty when measuring, and be convenient to the storage and the management of data, modular design makes replacement of element convenient.
Description of drawings
Fig. 1 is the utility model wireless tilt sensor construction synoptic diagram;
Fig. 2 is a wireless transmitter module schematic diagram in the utility model wireless tilt sensor;
Fig. 3 is the utility model wireless tilt sensor pcb wiring diagram.
Embodiment
As shown in Figure 1, angular transducer 2 is connected with radiofrequency emitting module 3, be installed on the civil construction thing 1, after 2 pairs of angle of inclination data of angular transducer are picked up, radiofrequency emitting module 3 is launched angle signal by antenna, be placed on the indoor Receiver Module of remote monitoring 4 and be responsible for the receiving angle signals, and upload to notebook computer 6 by RS232 data line 5 and show and handle.
1, the angle of inclination data are picked up
In this example, we have chosen the angle of inclination that the digital angular transducer of ADXL202E obtains buildings.Its measuring principle is by measuring the static weight component on the dip plane, carrying out the arcsin function computing then and obtain the angle of inclination value indirectly.Selecting the main cause of ADXL202E is that this chip body periphery circuit design is simple, low in energy consumption; Can directly export digital angle signal (PWM ripple), be convenient to be connected with radiofrequency emitting module.By the design to the ADXL202E peripheral circuit, the design resolution of gradient sensor is 0.01 degree, and range of dynamic measurement 5Hz satisfies the requirement of civil construction thing angle of bank measurement.
2, angle of inclination data radio frequency transmission
Aspect the wireless transmitter module of angle of inclination, we have selected the nRF9E5 chip of NORDIC company for use.Mainly consider: (1) nRF9E5 aspect software programming and 8051 general single-chip microcomputer registers of industry be provided with substantially compatiblely, can utilize Keil-C to carry out modularization programming, the programming cost is lower.(2) nRF9E5 can be in the ISM of 433MHz (industry, science, medical treatment) frequency range work, and 433M belongs to the radio frequency band that the world opens for free, and is not subjected to wireless communication control under the miniwatt situation.(3) compare with the radio-frequency modules such as bluetooth with the 2.46Hz of power, nRF9E5 has remarkable advantages aspect transmitting range and the cut-through thing ability.In this example, we are made as-10dB by the emissive power of programming with nRF9E5 in order to prolong the battery-powered time of wireless angular transducer, adopt the 3.3V power supply, and space barrier-free wireless transmission range is about 100 meters.
Realize that the reliable and stable wireless transmission of angle signal is a vital part of the present utility model.As shown in Figure 2, system-level radio frequency chip year nRF9E5 has been integrated into chip internal with high-frequency circuit and many peripheral cells, and digital circuit is reduced to minimum to the influence of high-frequency communication.In order to obtain performance for wireless communications preferably, we design this module in strict accordance with the databook of nRF 9E5.In order to reduce the interference of circuit board noise to twireless radio-frequency communication, we make independent circuit board with nRF 9E5.Reserve slot on motherboard, the nRF9E5 governor circuit communicates by the digital transducer on slot and the female road plate.Also made things convenient for when the nRF9E5 module breaks down and changed.
3, the making of sensor printed circuit board PCB
The wireless tilt sensor is a Digital Analog Hybrid Circuits, and it is particularly important that PCB layout just seems.Bad as if connecting up or making a plate, system's actual performance does not often reach designing requirement.For this reason, take major measure to comprise: the design of (1) ground plane: one preferably ground plane can produce a desirable 0V reference voltage, make all devices go lotus root to close easily.In this circuit, we adopt the thick doubling plate of 1.6mm, and all wirings and element are placed on one side, and another side is a ground plane.Vacant part in signal wiring layer all cloth becomes ground level, and there is a reliable ground plane in the system of assurance.In addition, do not allow two shared ground connection via holes of earth signal, crosstalk in order to avoid between two pads, produce.(2) power-supply wiring: power lead relaxes as far as possible, adds decoupling capacitor before the entering signal module.The electric capacity that has added one 10 μ F and one 0.01 μ F in this circuit is resisted external high frequency interference.Adopt the star wiring, the numerical portion of circuit and RF partly have power circuit separately.
Fig. 3 is the final PCB layout figure of sensor template.Wherein, U1 is program storage EEPROM; U2 is 9 needle serial port RS3232, and what the RS232 interface was set then is in order to be connected with PC at signal receiving end, to see shown in Figure 1; U3 is digital angular transducer ADXL202E; U4 is power supply control chip MAX1676; BT is the lithium coin cells socket; J2 is a nRF9E5 wireless transceiver slot.
4, sensor program Solidification
Above-mentioned 3 parts are mainly finished the hardware design of wireless tilt sensor.Sensor is wanted operate as normal, also needs: (1) with data acquisition and radio frequency transmission software download in EEPROM.Required software, we have write with Keil C and have finished.And with programmable device with the programming of .Hex object code, be cured among the EEPROM.The user only needs to power on to sensor, and sensor gets final product work.(2) in addition, the rf data that we utilize VC++ to develop the PC end receives and the RS232 signal procedure, can freely provide to the user.In view of the above, the user can couple together each functional module with reference to Fig. 1, realizes high building, the angle of inclination wireless measurement of civil structures such as bridge.
Claims (2)
1. wireless tilt sensor, comprise angular transducer, it is characterized in that, also comprise radiofrequency emitting module and Receiver Module, angular transducer is connected with radiofrequency emitting module, is installed on the testee, after angular transducer picks up the angle of inclination data, radiofrequency emitting module is launched angle signal by antenna, Receiver Module receiving angle signal, and upload angle signal by the RS232 data line.
2. according to the described wireless tilt sensor of claim 1, it is characterized in that described radiofrequency emitting module and Receiver Module are selected the nRF9E5 chip for use, the nRF9E5 radio receiving transmitting module is connected by slot with wireless tilt sensor mainboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200721118U CN201514211U (en) | 2009-05-13 | 2009-05-13 | Wireless tilt angle sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200721118U CN201514211U (en) | 2009-05-13 | 2009-05-13 | Wireless tilt angle sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201514211U true CN201514211U (en) | 2010-06-23 |
Family
ID=42485623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200721118U Expired - Fee Related CN201514211U (en) | 2009-05-13 | 2009-05-13 | Wireless tilt angle sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201514211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591924A (en) * | 2012-08-13 | 2014-02-19 | 中国石油天然气集团公司 | A measuring instrument for detecting the angle of a cold bending pipe |
-
2009
- 2009-05-13 CN CN2009200721118U patent/CN201514211U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591924A (en) * | 2012-08-13 | 2014-02-19 | 中国石油天然气集团公司 | A measuring instrument for detecting the angle of a cold bending pipe |
| CN103591924B (en) * | 2012-08-13 | 2016-04-06 | 中国石油天然气集团公司 | A kind of measuring instrument detecting cold bending angle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100623 Termination date: 20110513 |