1. Identification, authentication and coverage control method, implemented on a system, comprising:
a central entity;
a network of beacons;
a set of terminals, in which each terminal is adhered to, at least, one beacon;
wherein said method is characterized in that a profile is defined for each terminal 1 including an authentication service 5 and a coverage control service 6, with a service identifier which is exclusive and the same for all Bluetooth\xae devices 4; also characterized in that when the Bluetooth\xae device 4 is detected by a beacon 2 of the network, it connects to the coverage service 6 of the device 4, wherein if the identification is positive:
the device 4 is considered a terminal 1 of the system;
it is authenticated that the terminal 1 belongs to the beacon 2 through the connection to said beacon 2 to the terminal 1 authentication service 5 exchanging, at least, four messages;
after the authentication process, if it is positive, the terminal 1 adheres to the beacon 2; if it is negative, the terminal 1 belongs to the system but is not adhered to said beacon 2.
2. Identification, authentication and coverage control method according to claim 1, characterized in that to identify the Bluetooth\xae device, two messages are exchanged, one confirming there is available service from the beacon 2 to the terminal 1, and another which is the reply message from the terminal 1 to the beacon 2.
3. Identification, authentication and coverage control method according to the preceding claims, characterized in that in the coverage control service 6 the status of the Bluetooth\xae synchronism channel is monitored because the moment the terminal 1 is out of coverage 3, this channel shall stop working, which shall cause a \u201cconnection failure\u201d that both the terminal 1 and beacon 2 will detect; thus, coverage loss 3 will be immediately detected.
4. Identification, authentication and coverage control method according to the preceding claims, characterized in that in the service connection authentication 5, at least, the following messages are exchanged:
Message 1: The beacon 2 sends the terminal 1 its beacon 2 identifier and requests it to send its user’s credentials;
Message 2: The terminal 1 receives the beacon 2 identifier and searches for the credential associated to that identifier; once the credential has been located; the terminal 1 sends it back to the beacon 2 for its verification;
Message 3: The beacon 2 verifies the credential against its user data base and sends a message to the terminal 1 informing of the result of the verification (OK or KO);
Message 4: The terminal 1 is able, at last, to identify whether it is within its beacon 2 or not, and sends the beacon 2 an ACK (acknowledgement).
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. Method for producing a hollow body made of metal, which comprises at least one first axial portion with a first cross-sectional area and a second axial portion with a second cross-sectional area and in which both first and second axial portions of the hollow body are connected to one another by means of a shape transition running in a radial plane, the method comprising:
producing a preform body, which comprises at least one transition region extending in an axial direction of the hollow body to be produced and is arranged between the first and the second axial portion, wherein, in the transition region, the cross-sectional area of the preform body continuously changes from a cross-sectional area of the first axial portion into a cross-sectional area of the second axial portion, the length of the transition region of the preform body is selected as a function of the wall thickness of the preform body, the change in shape in the shape transition and as a function of material,
accommodating the preform body in a die, wherein the die has a final external shape of the hollow body to be produced,
inserting a shaping mandrel into the preform body, wherein the shaping mandrel has the internal shape of the hollow body to be produced and
axially moving the shaping mandrel to upset the preform body in the die into the final shape of the hollow body.
2. Method according to claim 1, wherein
the preform body is produced from at least one blank using a rolling-in technique or by U-O forming.
3. (canceled)
4. Method according to claim 1, wherein
the preform body, in at least of the first and second axial portions, has the external and internal shape of the hollow body to be produced.
5. Method according to claim 1, further comprising
incorporating function elements andor secondary shaped elements into the hollow body to be produced.
6. Method according to claim 1, wherein
blanks made of steel or a steel alloy are used for producing the preform body.
7. Method according to claim 1, wherein
the preform body is produced from tailored blanks.
8. Apparatus for producing a hollow body made of metal, which comprises at least one first axial portion with a first cross-sectional area and a second axial portion with a second cross-sectional area and in which both the first and second axial portions in the axial direction of the hollow body are connected to one another by means of a shape transition running in a radial plane, the apparatus comprising:
a first die for producing a preform body from a blank using a rolling-in technique or the U-O forming method is provided, wherein the first die is configured so that the preform body comprises at least one transition region extending in an axial direction of the hollow body to be produced and arranged between the first and the second axial portion and, in the transition region, the cross-sectional area of the preform body continuously changes from a cross-sectional area of the first axial portion into a cross-sectional area of the second axial portion, and at least one second die for accommodating the preform body that is produced is provided with a shaping mandrel, wherein the second die has an external final shape of the hollow body, the shaping mandrel has an internal final shape of the hollow body to be produced and the shaping mandrel is axially slidable relative to the second die.
9. Apparatus according to claim 8, wherein
the first andor the second die andor the shaping mandrel comprises means for incorporating function elements andor secondary shaped elements into the hollow body.
10. Apparatus according to claim 8, wherein
means for automatically transporting a blank into the first die of the apparatus andor means for inserting the preform body into the second die andor means for removing the hollow body from the second die are provided.
11. Hollow body made of metal, which comprises at least one first axial portion with a first cross-sectional area and a second axial portion with a second cross-sectional area and in which both first and second axial portions of the hollow body are connected to one another by means of a shape transition running in a radial plane, wherein a maximum sheet thickness change in the axial direction of the hollow body is +\u221215%.
12. Hollow body according to claim 11, wherein
said hollow body consists of steel or a steel alloy.
13. Hollow body according to claim 11, wherein the maximum sheet thickness change in the axial direction of the hollow body is within a region of the shape transition.