Wireless winch sensor
Technical field
The invention belongs to the engineering parameter acquisition instrument technical fields in drilling engineering, more particularly, to a kind of wireless winch
Sensor.
Background technique
Drawworks sensor is the core sensor of drilling parameter measuring instrument, comprehensive logging instrument, is to derive from the most a kind of biography of parameter
Sensor, with well depth, bit location, bore when, the parameters such as footage per bit and the speed that makes a trip it is directly related, measurement accuracy and accuracy
It is directly related to the quality control of drilling engineering.The wired drawworks sensor of field application at present generally uses 5V-12V direct current
Power supply, operating current 4mA-20mA.Occur many problems in live use process:
(1) signal cable of long range is needed, installation, disassembly are restricted by drilling machine working environment, and it is time-consuming and laborious, to batch production
Drilling well and particularly inconvenient from operations such as formula well group drilling wells;
(2) signal cable resistance crosses conference and generates bigger partial pressure, the electricity of drawworks sensor signal processing circuit input
The phenomenon that requirement of processing circuit signal input is not achieved in pressure, causes signal-count value to lose when winch rotation is too fast;
(3) it is easy the interference by well site complex electromagnetic environment, interference signal is superimposed upon in the output signal of drawworks sensor,
It will make drawworks sensor output error signal.
Summary of the invention
The object of the present invention is to provide a kind of interference that can reduce drawworks sensor wire transmission, improve measurement accuracy and
Accuracy meets the wireless winch sensor of the requirement of the rapid drillings such as batch production, collecting well group.
The purpose of the present invention is what is realized by following technical proposals:
Wireless winch sensor of the invention, it is characterised in that approached including being arranged at the air guide halter of wire rope drum
Switching regulator drawworks sensor, the signal processor being connect close to switching regulator drawworks sensor by sensor signal lines with this, if
Set wireless radio frequency antenna and power switch on this signal processor, the wireless radio frequency antenna and receiving system without
Line connection,
Described includes the rotor being arranged on drum shaft close to switching regulator drawworks sensor, is determined with what this rotor was connected
The detecting head on this stator is arranged in son, the detecting head processing circuit being connected with this detecting head,
The signal processor includes microprocessor, is connected by spi bus with the microprocessor wireless
Radio frequency chip, the power module being connected with the microprocessor.
The signal processor is adsorbed in cylindrical outer metal baffle by several magnetic chucks.
The stator is a rosette shell, and the rotor is a metal gear, above the rotor
Equipped with N number of side's tooth.
The detecting head is a noncontacting switch, is made of an oscillator.
N number of side's tooth is 24 square teeth.
Advantages of the present invention:
(1) wireless winch sensor of the invention, eliminates transformation power supply unit and signal acquisition cable, improves scene
Installation, dismantlement work efficiency are suitable for the rapid drillings operations such as batch production, cluster well race;
(2) wireless winch sensor of the invention using high-precision design scheme, and applies reliable and stable short distance
Wireless-transmission network technology guarantees that measurement accuracy is high, and transmission speed is fast, strong antijamming capability, long transmission distance;
(3) wireless winch sensor of the invention, using super low-power consumption component chip, when extending the work of sensor
Between, reduce use cost and maintenance difficulties.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is of the invention close to switching regulator drawworks sensor internal structure chart.
Fig. 3 is signal processor working principle of the invention.
Fig. 4 is that wirerope of the invention arranges figure on roller.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing.
As shown in Figs 1-4, wireless winch sensor of the invention, it is characterised in that including leading for wire rope drum is arranged in
Close to switching regulator drawworks sensor 1 at air tube of bamboo in granary head, it is connect close to switching regulator drawworks sensor 1 by sensor signal lines 2 with this
Signal processor 3, wireless radio frequency antenna 5 and power switch 6 on this signal processor 3, the less radio-frequency are set
Antenna 5 and receiving system are wirelessly connected,
Described includes the rotor 10 being arranged on drum shaft close to switching regulator drawworks sensor 1, is connected with this rotor 10
The detecting head 8 on this stator 9 is arranged in the stator 9 connect, the detecting head processing circuit 7 being connected with this detecting head 8,
The signal processor 3 includes microprocessor 14, is connected by spi bus 17 with the microprocessor 14
Radio frequency chip 15, the power module 16 being connected with the microprocessor 14, the signal that signal processor 3 receives
A11 and signal B13 enters microprocessor 14 and is handled, and power module 16 is powered using 3.3V power supply system 12,
The signal processor 3 is adsorbed in cylindrical outer metal baffle by several magnetic chucks 4.
The stator 9 is a rosette shell, and the rotor 10 is a metal gear, the rotor 10
It is equipped with N number of side's tooth above.
The detecting head 8 is a noncontacting switch, is made of an oscillator.
N number of side's tooth is 24 square teeth.
The present invention is a kind of wireless winch sensor, and major function is achieved through the following technical solutions:
(1) working principle of this kind of wireless low-power consumption high-precision drilling machine drawworks sensor is (referring to Fig. 1): close to switch
Formula drawworks sensor 1 is satisfied at the air guide halter of wire rope drum, and roller generates pulse signal when rotating;Signal processor 3 connects
Pulse signal is received, and is converted into digital signal;It is sent by wireless radio frequency antenna 5 according to the communication protocol of design with low frequency signal
To the receiving node of the receiving system of backstage duty room, to calculate the displacement of hook.
(2) following (referring to fig. 2) close to the measuring principle of switching regulator drawworks sensor: drawworks sensor is by a stator 9
It is formed with a rotor 10.Stator 9 is a rosette shell, and two neighbouring detecting heads 8, rotor 10 are mounted side by side thereon
It is a metal gear, there are 24 square teeth above.When sensor is installed, rotor 10 is fixed together with drum shaft, and stator 9 is solid
Fixed motionless, when hook lifts from the top and puts down, roller rotation, rotor 10 is rotated with it.Detecting head 8 is a noncontacting switch, by one
A oscillator composition generates an alternating electromagnetic field in the front of oscillator coil sensitive surface.When having sheet metal close to oscillator coil
When, the high frequency magnetic field near detecting head 8 induces vortex in sheet metal, exports a low voltage signal;When sheet metal is separate
When oscillator coil, a high voltage signal is exported.When hook moves, the tooth and between cog sky of 10 gear of rotor alternately pass through detection
Head front, detecting head processing circuit 7 export a series of high voltages pulse signal alternate with low-voltage.
(3) 24 tooth drawworks sensor measurement accuracy are doubled than 12 tooth drawworks sensors, and it is big often to receive a pulse
The mobile distance H of hook may determine that the measurement accuracy of drawworks sensor, and wirerope is arranged on roller as shown in figure 4, not examining
In the case where considering steel wire tensioning power, calculation formula (1) are as follows:
H- is every to receive the mobile distance of a pulse hook;
N- wirerope number of share of stock;
The every circle umber of pulse of n- roller;
D- diameter of cylinder;
D- wirerope diameter;
The number of plies of the i- wirerope on roller.
12 tooth drawworks sensors rotation, one circle 48 pulse signals of output, 24 tooth drawworks sensors rotation, one circle output 80
Pulse signal.
Two winch accuracy comparisons under same operating, as shown in calculation formula (2):
24 tooth drawworks sensors are every to issue the half that the mobile distance of a pulse hook is 12 tooth drawworks sensors, so
The measurement accuracy of 24 tooth drawworks sensors is twice of 12 tooth drawworks sensors.
In addition, the signal cable of drawworks sensor is eliminated using Radio Transmission Technology, to eliminate due to resistance point
The phenomenon that pressure causes signalling technique numerical value to lose, substantially increases accuracy of measurement.
(4) a series of low-power consumption measures are taken from software and hardware:
(1) component chips such as the microprocessor 14 of sensor, radio frequency chip 15, power module 16 all select the world
The low-power chip of advanced level;
(2) operating current can be effectively reduced and reduce power consumption by reducing operation frequency of microprocessor.
Managing power consumption is carried out to sensor in process control, comprising:
(1) stable communication protocol reduces data packet garbage, effectively shortens data length, reduces sending time,
Reduce power consumption;
(2) error detection and correction mechanism guarantee the re-transmission that data packet is effectively reduced under conditions of the given bit error rate;
(3) the electric energy supply that software control does not need to nip off sensor module when sampling reduces power consumption.
It is high-precision close to switching regulator drawworks sensor, super low-power consumption electronic component, stable wireless transmission protocol be this
The characteristics of instrument.
Embodiment
The implementation process of the invention be it is such, referring to Fig. 1 course of work are as follows:
It will be satisfied at the air guide halter of wire rope drum close to switching regulator drawworks sensor 1, be rotated with drum shaft instrument,
With this come umber of pulse corresponding to angular displacement when measuring roller rotation.Signal processor 3 is adsorbed on rolling by three magnetic chucks 4
On cylinder external metallization baffle.6 are turned on the power switch, is started to work close to switching regulator drawworks sensor 1, the pulse signal of generation is logical
It crosses about 1 meter of sensor signal lines 2 and is sent to signal processor 3, by 14 signal acquisition of microprocessor, treatment process, according to
The communication coding agreement of design is emitted to the receiving node of backstage duty room by radio frequency chip 15 with wireless signal, to count
The mobile distance of hook is calculated, cooperation other sensors judge operating condition, the parameters such as when calculating well depth, bit location, boring.
The present invention is the engineering parameter acquisition instrument in a kind of drilling engineering, and effect is in monitoring record drilling process
Drilling machine hook height change, and with this come when calculating well depth, bit location, boring, the parameters such as footage per bit and the speed that makes a trip, sentence
Disconnected operating condition, aided drilling operation.
Wireless winch sensor of the invention, eliminates transformation power supply unit and signal acquisition cable, improves live peace
Dress, dismantlement work efficiency are suitable for the rapid drillings operations such as batch production, cluster well race;Using high-precision design scheme, and answer
With reliable and stable short distance wireless communication network technology, guarantee that measurement accuracy is high, transmission speed is fast, strong antijamming capability, passes
Defeated distance is remote;
Using super low-power consumption component chip, the working time of sensor is extended, use cost and Maintenance Difficulty are reduced
Degree.