Programmable probe system

• US 6,301,796 B1
• Filed: 04/06/1998
• Issued: 10/16/2001
• Est. Priority Date: 04/14/1997
• Status: Expired due to Fees

• Current Assignee: Renishaw PLC
• Original Assignee: Renishaw PLC
• Inventors: Cresson, Serge
• Primary Examiner(s): Gutierrez, Diego
• Assistant Examiner(s): SMITH, RICHARD A
• Application Number:
  US09/055,407
• Time in Patent Office: 1,289 Days
• Field of Search: 335/56, 335/58, 335/59, 335/61, 335/03, 335/04, 335/05, 702/167, 702/168, 702/188, 702/150, 702/151, 702/152, 702/153, 340/825.23
• US Class Current: 33/556
• CPC Class Codes: G01B 21/047 Accessories, e.g. for positioning, for tool-setting, for measuring probes
• CPC Class Codes: G01B 2210/58 Wireless transmission of information between a sensor or probe and a control or evaluation unit
• CPC Class Codes: G01B 7/00 Measuring arrangements characterised by the use of electric or magnetic techniques
• CPC Class Codes: G05B 19/4147 characterised by using a programmable interface controller [PIC]
• CPC Class Codes: G08C 19/12 in which the signal transmitted is frequency or phase of ac

Abstract

A programmable probe system for a machine includes a probe, an interface and a two-way optical communication link between them. The probe includes signal conditioning electronics, a power supply, a plurality of on/off switch circuits whereby the electronics may be connected to, and disconnected from, the power supply by a variety of means, for example, an optical signal, or a mechanical switch and a timing circuit. The probe also includes a microprocessor which can be externally programmed from the interface to select one or other of the on/off switch circuits. Where the probe includes a radio transmission for transmitting probe data to the interface, it is also provided with a synthesiser for generating different operating frequencies for the transmission system. The microprocessor can also be programmed from the interface to change the frequency of the system where required.

Claims

1. A programmable probe system for a machine comprising a probe, an interface and a wireless communication link therebetween, wherein:

the probe has a plurality of modes of operation, each of which has a plurality of selectable states which are selectable by external programming, and includes a microprocessor which is programmed to select any one of said selectable states of any one of the plurality of modes of operation of the probe;

the interface is mountable on the machine and includes a microprocessor which is externally programmable and determines for each one of said modes of operation of the probe which one of said selectable states is to be selected; and

the wireless communication link includes a transmitter on the interface for sending to the probe a signal which comprises program instructions for the microprocessor in the probe to make the selection of said one of the selectable states of at least one of the modes of operation of the probe as determined by the operator, and a receiver on the probe for receiving said signal to enable the microprocessor in the probe to make said selection.

2. A programmable probe system according to claim 1, the probe including a power supply and probe electronics for generating probe data to be sent to the machine, and wherein one of the modes of operation of the probe is an on and off mode in which the probe is switched on and off, and the selectable states of said on and off mode of operation are the means whereby which the probe electronics may be disconnected from, and connected to, the power supply and include switch circuits in the probe.

3. A programmable probe system according to claim 1 wherein one of the modes of operation of the probe is a linking mode using a further wireless communication link between the probe and the interface by means of which probe data signals are transmitted from the probe to the interface, and the selectable states of said linking mode of operation of the probe are the parameters of the further wireless communication link.

4. A programmable probe according to claim 3 wherein the further wireless communication link is a radio transmission system which comprises a radio transmitter in the probe and a radio receiver in the interface, and the selectable states of said linking mode are a plurality of channel frequencies of pre-selected bandwidths for transmitting said probe data signals to the interface.

5. A programmable probe system according to claim 4, wherein frequency synthesizers are provided in the probe and interface for changing the frequency of the probe data signals between the pre-selected bandwidths, wherein the microprocessor in the interface stores channel data and is programmable by the operator to select a channel frequency to activate the synthesizer in the interface to tune the radio receiver to the selected channel frequency and, when required, to communicate the selected channel frequency to the probe across said further wireless communication link, and further wherein the microprocessor in the probe is programmed to receive channel frequency selection information from the interface and to activate the synthesizer in the probe to tune the radio transmitter in the probe to the selected channel frequency.

6. A programmable probe system according to claim 1, wherein the wireless communication link further comprises a transmitter on the probe and a receiver on the interface by means of which information relating to status of switch circuits in the probe is communicated to the interface.

7. A programmable probe system according to claim 1, wherein the wireless communication link comprises at least one optical transmitter and receiver.

8. A programmable probe system for a machine including:

a probe having a power supply and probe electronics for generating probe output data, the probe having a plurality of modes of operation each of which has a plurality of selectable states,

a machine interface;

wherein one of the modes of operation of the probe comprises a first wireless communication link between the probe and the interface for sending the probe output data to the interface, said communication link having a plurality of selectable states, and further wherein a second wireless communication link is provided between the probe and the interface for sending signals between the interface and the probe for selecting which of the selectable states of the first communication link is to be used.

9. A programmable probe system according to claim 8 wherein the first communication link is a radio transmission system and the selectable states of the radio transmission system are channel frequencies of pre-selected bandwidths for transmitting the probe data signals to the interface.

10. A programmable probe system according to claim 9 wherein the radio transmission system comprises a transmitter on the probe and a receiver on the interface.

11. A programmable probe system according to claim 8 wherein the second wireless communication link comprises an optical transmission system.

12. A programmable probe system according to claim 11 wherein the optical transmission system comprises a transmitter on the interface and a receiver on the probe by means of which a selected one of the selectable states of the first communication link is communicated to the probe.

13. A programmable probe system according to claim 11 wherein the optical transmission system further comprises a transmitter on the probe and a receiver on the interface by means of which a selected one of the selectable states currently programmed into the probe is communicated to the interface.