1. A method of enabling a seismic data acquisition module for use in a wireless array, the method comprising:
initializing the seismic data acquisition module in response to an orientation of the seismic data acquisition module;
discovering at least one other seismic data acquisition modules in the wireless array; and
establishing a data transfer path between the seismic data acquisition module and the at least one other seismic data acquisition module.
2. The method of claim 1, further comprising:
monitoring the orientation of the seismic data acquisition module with a tilt sensor.
3. The method of claim 2, wherein the tilt sensor is a multi axis accelerometer.
4. The method of claim 1, further comprising:
performing at least one autonomous test.
5. The method of claim 4, wherein results of the at least one autonomous test are communicated in said discovering.
6. The method of claim 5, wherein the results of the at least one autonomous test are used in said establishing.
7. The method of claim 4, wherein the at least one autonomous test includes at least one of a battery test, a self test, an analog test, and a GPS test.
8. The method of claim 7, wherein the battery test comprises:
determining a charge level of a battery; and
comparing the charge level to a predetermined threshold charge value.
9. The method of claim 7, wherein the self test includes at least one of an analog performance memory test, a GPS serial test, a modem register configuration test, a voltage test, a current consumption test, and a humidity test.
10. The method of claim 7, wherein the analog test includes at least one of a geophone ohms test, a leakage test, and a noise test.
11. The method of claim 7, wherein the GPS test comprises:
verifying a valid GPS signal;
disciplining a system time, and;
storing location data corresponding to a location of the seismic data acquisition module.
12. The method of claim 11, wherein the GPS test further comprises:
powering a GPS unit down after said verifying, disciplining, and storing.
13. The method of claim 1, wherein the discovering comprises:
broadcasting a discovery signal from the wireless seismic data acquisition module; and
receiving a reply signal from a second module.
14. A method for deploying a plurality of seismic data acquisition modules comprising a seismic data acquisition system, comprising:
positioning each of said plurality of seismic data acquisition modules in an array;
initiating each of said plurality of seismic data acquisition modules in response to a corresponding orientation of each said plurality of seismic data acquisition modules;
discovering at each of said plurality of seismic data acquisition modules adjacent seismic data acquisition modules;
establishing a data transfer path between said plurality of seismic data acquisition modules;
conducting a seismic data acquisition; and
transferring seismic data via said data transfer path.
15. The method of claim 14, further comprising:
performing at each of said plurality of seismic data acquisition modules at least one autonomous test to generate a test result for each of said plurality of seismic data acquisition modules;
communicating the test result for each of said plurality of seismic data acquisition modules; and
employing the test result in said establishing.
16. The method of claim 14, wherein at least two data transfer paths are established in said establishing.
17. A seismic data acquisition module, comprising:
a transceiver;
an activation sensor capable of sensing an orientation of the seismic data acquisition module and producing an output;
a microprocessor in operative communication with the activation sensor and operative to interpret the output to determine if the seismic data acquisition module is in a deployed orientation;
wherein, upon said determining the seismic data acquisition module is in the deployed orientation, the microprocessor is operative to control the transceiver to broadcast a discovery signal.
18. The seismic data acquisition module of claim 17, wherein the activation sensor is a tilt sensor.
19. The seismic data acquisition module of claim 18, wherein the tilt sensor is a three axis accelerometer.
20. The seismic data acquisition module of claim 17, further comprising;
a battery test module, responsive to said determining the seismic data acquisition module is in the deployed orientation, for determining an available power supply to the seismic data acquisition module.
21. The seismic data acquisition module of claim 20, wherein the battery test module includes a power supply, an analog to digital converter in electrical communication with the power supply and a microprocessor, wherein the analog to digital converter converts a voltage signal from the power supply to a digital voltage signal that is interpreted by the microprocessor to calculate a battery life value for the power supply.
22. The seismic data acquisition module of claim 17, further comprising;
a self test module, responsive to said determining the seismic data acquisition module is in the deployed orientation, for testing functionality of module control components;
23. The seismic data acquisition module of claim 22, wherein the self test module includes a microprocessor in electrical communication with a digital to analog converter operative to convert a test signal from the microprocessor into an analog test signal that is transmitted to a plurality of module sensors.
24. The seismic data acquisition module of claim 17, further comprising;
a deployment test module, responsive to said determining the seismic data acquisition module is in the deployed orientation, for testing functionality of the seismic data acquisition components;
25. The seismic data acquisition module of claim 24, wherein the deployment test module is capable of performing a geophone ohms test, a leakage test, and a noise test.
26. The seismic data acquisition module of claim 17, wherein the deployment test module includes a microprocessor in electrical communication with a digital to analog converter operative to convert a test signal from the microprocessor into an analog test signal that is transmitted to a plurality of seismic data acquisition sensors.
27. The seismic data acquisition module of claim 17, further comprising;
a GPS test module, responsive to said determining the seismic data acquisition module is in the deployed orientation, for testing functionality of a GPS receiver on the module;
28. The seismic data acquisition module of claim 27, wherein the GPS test module includes a GPS receiver in communication with a microprocessor.
29. The seismic data acquisition module of claim 17, further comprising;
a radio test module, responsive to said determining the seismic data acquisition module is in the deployed orientation, to test functionality of radio components on the module.
30. The seismic data acquisition module of claim 29, wherein the radio test module includes a transceiver in electrical communication with a microprocessor, the transceiver operative to broadcast a discovery signal and further operative to receive a response signal.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A control apparatus for an internal combustion engine, comprising:
a fuel supply device that supplies fuel in a fuel tank to said internal combustion engine;
an air fuel ratio detection unit that is arranged in an exhaust system of said internal combustion engine for detecting an air fuel ratio in an exhaust gas from said internal combustion engine;
an air fuel ratio correction amount calculation unit that calculates an amount of air fuel ratio correction for correcting an amount of injection fuel supplied to said internal combustion engine based on the air fuel ratio detected by said air fuel ratio detection unit;
an estimation permission determination unit that makes a determination that a starting condition for estimation of a concentration of said fuel holds when said air fuel ratio correction amount becomes out of a range of a predetermined threshold, and sets a permission time for said concentration estimation in accordance with a first accumulated amount of injection fuel which is obtained by summing said amount of injection fuel supplied to said internal combustion engine after said starting condition for concentration estimation holds;
a concentration estimation unit that calculates the estimated value of a concentration of a single component of said fuel based on said air fuel ratio correction amount during the time when said concentration estimation is permitted by said estimation permission determination unit; and
a fuel injection amount calculation unit that corrects said amount of fuel to be injected in accordance with said air fuel ratio correction amount and said estimated concentration value.
2. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said concentration estimation unit updates said estimated concentration value based on said air fuel ratio correction amount and a control constant, and variably sets said control constant in accordance with said first accumulated amount of injection fuel.
3. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said fuel supply device includes:
a canister that adsorbs a vaporized gas generated from said fuel in said fuel tank; and
a purge opening and closing unit that introduces said vaporized gas adsorbed by said canister into said internal combustion engine; and
wherein said estimation permission determination unit sets a purge inhibition period for inhibiting said purge opening and closing unit from being opened in accordance with said first accumulated amount of injection fuel.
4. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said fuel supply device includes:
a canister that adsorbs a vaporized gas generated from said fuel in said fuel tank; and
a purge opening and closing unit that introduces said vaporized gas adsorbed by said canister into said internal combustion engine; and
wherein said estimation permission determination unit sets a period for determining whether said starting condition for concentration estimation holds, as a purge inhibition period for inhibiting said purge opening and closing unit from being opened.
5. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said air fuel ratio correction amount calculation unit includes a learning correction unit that corrects said amount of injection fuel by using a learning correction coefficient that has been updated by applying filter processing or averaging processing to said air fuel ratio correction amount;
wherein said estimation permission determination unit includes a learning value update inhibition period setting unit that sets an update inhibition period for inhibiting the update of said learning correction coefficient; and
wherein said learning value update inhibition period setting unit sets, as said update inhibition period, a period for determining whether said starting condition for concentration estimation holds and a period in which said first accumulated amount of injection fuel indicates a value equal to or less than a first predetermined amount.
6. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said estimation permission determination unit resets said learning correction coefficient to a predetermined value when the starting condition for concentration estimation holds.
7. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said estimation permission determination unit makes a determination that said starting condition for concentration estimation holds, when a second accumulated amount of injection fuel, which is obtained by summing amounts of fuel injected in periods in which said air fuel ratio correction amount becomes out of the range of said predetermined threshold, reaches a second predetermined amount.
8. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said estimation permission determination unit variably sets said predetermined threshold in accordance with a third accumulated amount of injection fuel which is obtained by summing amounts of fuel injected after refueling of said fuel tank.
9. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said estimation permission determination unit sets a control stop inhibition period for not stopping the calculation of said air fuel ratio correction amount in said air fuel ratio correction amount calculation unit in accordance with said first accumulated amount of injection fuel.
10. The control apparatus for an internal combustion engine as set forth in claim 1,
wherein said estimation permission determination unit sets a period for determining whether said starting condition for concentration estimation holds, in accordance with a third accumulated amount of injection fuel which is obtained by summing amounts of fuel injected after refueling of said fuel tank.