Detonator system and method in connection with the same
A method for wirelessly transmitting data to a control unit, such as a blasting machine, selected from a plurality of control units from an operating device selected from a plurality of operating devices, and a system intended for the method. The control unit is connected to a plurality of detonators, which are controlled by the control unit via an electrical wire or a fuse. The operating device is associated with the appropriate control unit in a step in which address data and/or encryption data is exchanged between the units. Only one operating device can be associated with a pre-determined control unit at any given moment. The data transmitted in accordance with the method preferably comprises at least a fire command, which instructs the control unit to fire the detonators.
1. A method for wirelessly controlling a control unit selected from a plurality of control units in a detonator system by means of an operating device selected from a plurality of operating devices, the selected control unit being further connected to a round of detonators and controlling the function thereof, comprising the steps of
associating the selected operating device and the selected control unit with each other, a dedicated communication protocol for wireless communication between the selected operating device and the selected control unit being established, which allows communication only between the selected operating device and the selected control unit including the sub-steps of
registering the identity of the selected operating device in the control unit, and
transmitting the identities together with control data during communication in accordance with the established communication protocol, and
transmitting control data in accordance with said communication protocol from the operating device to the control unit,
wherein the communication protocol requires encryption of predetermined parts of the data to be transmitted from the operating device to the control unit before transmission thereof, and
wherein the step of associating the operating device and the control unit with each other comprises the sub-step of transmitting encryption data between the operating device and the control unit, and the step of transmitting control data comprises the sub-step of encrypting, by means of said encryption data, selected arts of the data to be transmitted from the operating device to the control unit, said encryption data comprises a encryption table containing a number of encryption entries.
2. A method according to claim 1 , wherein the step of associating the operating device and the control unit with each other comprises the sub-step of defining a label unique to the association that is registered both in the control unit and in the operating device,
the communication protocol for wireless communication requiring transmission of the label, and the transmitted label being verified against the defined label in the receiving unit.
3. A method according to claim 1 , wherein the communication protocol requires transmission of a receiver identity and wherein the transmitted receiver identity is verified against the registered identity in the receiving unit.
4. A method according to claim 1 , wherein the identity of each unit is an address unique to the unit.
5. A method according to claim 1 , wherein the step of transmitting the control data in accordance with the communication protocol comprises the sub-step of transmitting an encryption pointer from the control unit to the operating device, the encryption pointer indicating the encryption entry in the encryption table to be used in the next data encrypting operation.
6. A method according to claim 5 , wherein a particular encryption entry is indicated only once and then deleted.
7. A method according to claim 1 , wherein the control data transmitted from the operating device to the control unit comprises a fire command instructing the control unit to fire the round.
8. A method according to claim 7 , wherein the fire command is encrypted.
9. A method according to claim 1 , wherein the control data transmitted from the operating device to the control unit comprises an arm command instructing the control unit to arm the round.
10. A method according to claim 9 , wherein the arm command is encrypted.
11. A method according to claim 1 , wherein the step of associating the operating device and the control unit with each other is carried out in connection with the charging of batteries in the operating device.
12. A method according to claim 1 , wherein the step of associating the operating device and the control unit with each other is carried out in connection with the charging of batteries in the operating device which is done when the operating device is in contact with the control unit.
13. A method for wirelessly controlling a control unit selected from a plurality of control units in a detonator system by means of an operating device selected from a plurality of operating devices, the selected control unit being further connected to a round of detonators and controlling the function thereof, comprising the steps of
associating the selected operating device and the selected control unit with each other, a dedicated communication protocol for wireless communication between the selected operating device and the selected control unit being established, which allows communication only between the selected operating device and the selected control unit including the sub-steps of
registering the identity of the selected operating device in the control unit, and
transmitting the identities together with control data during communication in accordance with the established communication protocol, and
transmitting control data in accordance with said communication protocol from the operating device to the control unit,
wherein transmission of control data from the operating device to the control unit comprises the steps of
initiating the transmission from the operating device by sending an addressed initiation message to the control unit,
confirming initiation from the control unit by sending an addressed confirmation message to the operating device, the confirmation message further comprising an encryption pointer indicating an encryption entry to be used when transmitting the control data,
encrypting, in the operating device, selected parts of the data to be transmitted, the indicated encryption entry being used for the encrypting, and
transmitting the encrypted data from the operating device to the control unit in an addressed message.
14. A detonator system comprising:
a plurality of control units, and
a plurality of operating devices,
the control units and operating devices being designed in such manner that a control unit and an operating device selected from the plurality of control units and operating devices are associable with each other by establishing a dedicated communication protocol,
the communication protocol allowing secure wireless communication of control information from the selected operating device to the selected control unit associated therewith,
said control unit being connected to and arranged to control the operation of a round of detonators based on control information communicated from the operating device to the control unit according to said protocol,
wherein the dedicated communication protocol requires transmission of a receiver identity in the case of wireless communication between the selected operating device and the selected control unit,
wherein at least one of the selected operating device and the selected control unit is adapted to encrypt predetermined parts of the data to be transmitted wirelessly in accordance with the communication protocol, and
wherein the control unit is adapted to generate an encryption table and also to transmit the encryption table to the operating device in connection with the association of the control unit and the operating device with each other.
15. A detonator system according to claim 14 , wherein the dedicated communication protocol requires transmission of a label unique to the association in the case of wireless communication between the selected operating device and the selected control unit.
16. A detonator system according to claim 14 , wherein the receiving unit is adapted to check that the receiver identity corresponds to the actual identity of the receiver.
17. A detonator system according to claim 14 , wherein the receiver identity is an address unique to the receiving unit.
18. A detonator system according to claim 14 , wherein the encryption table comprises a number of encryption entries.
19. A detonator system according to claim 18 , wherein the control unit is adapted to wirelessly transmit to the operating device a pointer indicating the encryption entry in the encryption table to be used in the next encrypting operation.
20. A detonator system according to claim 19 , wherein the control unit is adapted not to transmit a pointer indicating a previously indicated encryption entry.
21. A detonator system according to claim 14 , wherein the operating device is adapted to wirelessly transmit an arm command to the control unit, the arm command instructing the control unit to arm a round connected to the control unit.
22. A detonator system according to claim 21 , wherein the operating device further is adapted to encrypt the arm command before it is wirelessly transmitted to the control unit.
23. A detonator system according to claim 14 , wherein the operating device is adapted to wirelessly transmit a fire command to the control unit, the fire command instructing the control unit to fire a round connected to the control unit.
24. A detonator system according to claim 23 , wherein the operating device further is adapted to encrypt the fire command before it is wirelessly transmitted to the control unit.
25. A detonator system according to claim 14 , wherein the control unit is provided with a holder in which the operating device is to be placed when the operating device and the control unit are associated with each other.
26. A detonator system according to claim 14 , wherein the control unit further is adapted to wirelessly transmit data regarding its current state to the operating device.