TW534976B - Optical measuring apparatus for measuring objects on machines - Google Patents

Abstract

A light source generates a beam of light which is incident on a detector which generates a trigger signal when the beam incident upon it is occluded by a tool. To avoid trigger signals being produced when the beam is temporarily occluded by coolant drips passing through the beam, the detector produces a detection signal each time the beam is occluded, but only produces a trigger signal if a further detection signal is produced in a specified time interval from the generation of an earlier detection signal. One method of generating the time interval (Fig. 2) is by rotating the tool so that the beam is occluded at time intervals (t1) each time a cutting edge of the tool enters the beam. If no second signal is generated within an interval (t2) at the end of interval (t1) no trigger signal is produced.

Description

534976 V. Description of the invention (i) The present invention relates to a type of machine that is also used to determine the phase of an object (such as a machine tool). 'Point location. For example, a beam set on a detector may be used in a machine setting device known for a machine tool. Yu… ^ includes the first source which generates a thin light Λ: ^ across the direction of the beam propagation direction. During the operation, the machine is actuated to signal. The trigger signal is generated by the detection unit to generate the trigger setting to determine the dimension of the machine. This ;, the relative position of the moving parts 42 385 04 and D.E 42 448 by the German patent case 肫 European patent case number 98,93, and the United States = 2: 3 555. Is known. The device can also be used to measure bed, 5 7 cracks or wear. The length or diameter of the machine tool monitors the machine tool. The detection unit is incident into the unit == 通 ”The bed smells into the light beam. The trigger signal can be at: = when the light intensity on the tester has a predetermined decrease and the first beam is due to falling on this optical measuring device Occurs when a beam can be dripped through the beam during the measurement operation, the coolant used by the device can enter, and the beam can generate a false trigger signal. Or throw away from the rotating machine tool currently using methods to overcome this problem (software) to perform several Measure until the planning machine follows the call of the controller. Then suppose that the position of the machine tool is 534976. V. Invention Description (2) The period is unacceptably extended. The present invention seeks to improve this problem by providing a measurement method which can 'In addition, the positive machine tool measures the signal generated by the coolant dripping. According to a characteristic aspect of the present invention, a method for measuring using an optical measuring device-object on the machine tool is provided. —The light is incident on the detector, and the method includes the following nightmare: · When the beam is interrupted, the signal is generated / detected inside the detector; The frequency and / or duration of the occurrence; the detector outputs a signal when there is another detection signal at a predetermined time interval from the detection of the first detection signal. The timing can be achieved in a variety of ways. In a specific embodiment of the present invention, the machine tool preferably rotates at a known specific speed. In this way, when the cutting edge of the machine tool interrupts the beam, a ΐΐΓΓ sequence signal is generated inside the detector. Among these signals, The generation of the first signal is used to initialize a timing sequence, which sets the time required for a period of time to make a substantial revolution, and then the second time interval bed is shorter than 2: 1 (1: 1). The device that generates a signal is the time when the cutting edge of the machine tool is turned back again and the time interval (t2) = occurs. Then, the tester sends out an output signal. It sends a dual-purpose that is synchronized with the rotation speed of the machine tool. ¥ pulse, 此种: & rush is generated inside the detector during this pulse. Once again, the device sends an output signal. When the primary detector generates a basin reading; Detector during pulse ;; Health

Page 7 534976 V. Description of the Invention (3) The clock stops at each clock. The invention + ~ source is used to generate = account for the optical measurement device that executes the method, which includes an off-beam and a detector to receive the light beam, and when the light beam is in the light beam; the editor includes-detection Test the frequency and / or duration of each occurrence of the circuit, and only if it appears twice. ^ The first silver = tbl is generated by the detection circuit within a specified period of time after the occurrence, and then the signal processing device sends an output signal. 5 An example of the present invention is illustrated with reference to the accompanying drawings, in which: 3 = according to the present Perspective view of the invention's optical measuring device; Figure 2 is a representative diagram of the detector output of Figure 1; and Figure 3 is a block diagram showing the basic components of the device; Figure 4 illustrates the signal processing circuit of the detector with lines 4a to 4 Signals generated by each component. . . Referring now to FIG. 1, an optical measuring device is shown in an assembled form. The optical measuring device is suitable as a machine tool setting device, for example, on a machine tool. The device includes a light emitting unit 10 which emits a light beam 2 and a light detection unit 4 where a light beam 12 is detected. The power lines and signal control of the light transmitting and detecting units 10 and 14 and the cable lines pass through the port 丨 6, the two units 丨 0 and 丨 4 are preferably installed on the machine base through the pillar j, and can be passed through the intermediate base 2 〇 And install, or directly wear women's clothing on the base of the machine to be used. During operation, the device is used for machine setting.

, The machine moves in the direction across the propagation direction of the light beam 12 = when the predetermined beam blocking degree of K is installed, the detection unit 14 sends a trigger signal,

Page 8 534976 V. I. Description of the invention (4) The trigger signal is used by the machine to determine the relative position of its relative moving parts, thereby determining the dimensions of the machine tool. Further mechanical and optical details of such a device example are described in the inventor's European Patent Application No. 03 3 7 4 9 · 6 (and are hereby incorporated by reference) and will not be repeated here. Figure 2 shows the output of the detector under various conditions. When the light beam is blocked to a predetermined degree, the output voltage of the * voltage pulse display 'detector goes high (that is, / as can be seen from the first pulse S1 on the left side of the figure, this situation may also occur when the coolant Diluo passes through the first beam. = In the first case, the coolant drops pulse for a short time. Conflicts, Yasaka S2 U: There is also a short time pulse when the beam is broken. Other cutting edges interrupt the beam in sequence. A pulse of the cutting tool). ^ Generate its dagger pulse S3 (the figure only shows the difference in order to identify the drop resistance p (this is the measurement of cutting ^ 丨 /, the edge of the cutting tool for the first time blocking the f rigid device between the beam must be tested) The invention provides ^ I. Each specific # h bluffs to set the first time to slewing at the same time :: 歹, sergeant 'time interval I is set equal to the time interval t of the tool. At the end, the timer is set to be more powerful, and the head 2 is 2 droplets. This is :: The interval t2 is used as the second detection signal. If the-signal is detected. If; High state or rise of the signal

For a debt test signal ’, the detector sends a“ skip ”signal or trigger signal at the end of the time interval t2 534976. 5. Description of the invention (5). Since the time interval and t2 are accurately known, the instant at which the first rising edge of the detector output occurs due to the obscuration of the beam by the cutting edge of the tool can be calculated. To calculate the timing, the spindle speed of the machine must be set and the cutting tool must be set. In order to keep the measurement operation time as low as possible, during the experiment, the spindle speed was set to 1000 rpm, so the 1 ^ name was 60 milliseconds. However, the time interval t2 must be large enough to cater for small changes in spindle speed, such as at most 5%, resulting in a change of 3 milliseconds. In order to center the trigger signal at time interval t2, t set at t + 1/21 must be equal to 60 milliseconds. So ti is indeed set at 5 8 · 5 ms. Before measurement, the tool speed does not need to be known because the tool speed can be measured by the rising edge interval timing of the first two consecutive pulses in the multi-pulse sequence generated by the debt detector. The time interval (t) is then set between the second and third rising edges' and (&) is timed by the third rising edge. The basic element of the device of the present invention enters the electrical detector with the light beam of transmitter 10 and enters the electrical detector. When the light beam is interrupted, the signal passes through the signal processor 7 4 and signals the timing device. Detector output signal stays on the machine, and evaluates the machine's scale reading. Figure 4 illustrates an alternative embodiment. Pulsed, each clock generates a series of light beams that are interrupted and initialized. Figure 4a shows the peach_melon through the teeth and droplets. Is not shown in the figure; j. The light from the device 14 and its impact detection circuit 72 generates a signal. The number processor generated by the detection circuit 72 includes the signals needed for signal analysis and sends them directly to the machine controller 80, which stops to determine the location of the machine. Eight Where one or more pulses are used in the detector, the detector sends a signal to indicate that a mixed interruption of the beam causes a series of events

Page 10 534976

Figure 4b shows the signals generated by these events when the detector signal processor is used as a comparator output pulse; Figure 4c shows what happens to the detector when a single clock is used; Figure 4d shows the use of a second clock What happens to the clock time and the detector; Figures 4e and 4f show the results of the combination of the comparator output and the clock} and the clock 2 rounds, respectively. It can be seen from Figure 4a that the interruption of the beam at random intervals occurs when droplets occur, but the interruption of the beam caused by the edge of the tool occurs at regular intervals. Each beam interruption is marked with a numbered event E. Figure 4b shows the comparator output pulses corresponding to these events. Figure 4c shows that the first clock is started when the event E1 occurs, but when the second clock pulse is sent to the # comparator, no event occurs and the clock stops. When the event E3 (also a droplet) occurs, the clock is started again, but the second pulse appears between the events E4 and E5 and the clock is stopped without the event E4. The situation was the same when Event E5 was reactivated. Only when event E7 is restarted, the pulse system is synchronized with the cutting of the tool due to the event E 9 cutting off the beam, so a trigger signal will be generated at event E7. This signal misses the cutting edge due to the initial interruption of the beam at £ 6 and thus produces an erroneous reading. However, as shown in FIG. 4d, in the specific embodiment using the second clock, the second clock will be started at the event E6 'because the first clock is running at that time. Since event E 6 is the interruption of the beam by the edge of the cutting tool, another event E 7 will occur when the clock pulse is generated. The signal processor will recognize the clock pulse, the event is now synchronized 'and a trigger signal will be generated on the rising edge of the pulse. due to

534976 V. Description of the invention (7) The clock pulse is generated by the interruption of the light beam in the middle of the light g. The interruption is synchronized, so it is easy to decide when the miscellaneous cause is caused, and the situation becomes more different: the event triggers a Trigger signal. ] It will be understood that if it is between the first event and the second event, it is ignored by the scholars and princes. The reason is that the price :: 门 ^ present droplets' is produced by the first-clock species π τ ^ $ 收 月 况 于 brother-pulse did not occur during the pulse. Under such conditions, the droplet will not affect the generation of the trigger signal. It has already been used—with or with two clocks to explain the current sun and moon. If multiple clocks are used and mosquitoes at different frequencies can obtain other effects. Use Xi = Outfit! Different mandrel rotation speeds can be used without having to set the original liquid cooling sequence again. The extra clock will allow the device to handle a large number of situations that are expected to occur. The number of clocks must be compromised. Pin-out bluffing: When the tool is not rotated, it is pre-calibrated during the setting of the tool or used to detect the breakage of the protective device. In this specific embodiment, the signal generated by the detector is used to start the signal. If the output of the tester at that time is still the same as the suffix; ,,, 'exist, the signal processor generates a touch-in another embodiment-in a specific embodiment, the signal processor combines χ :: Don't synchronize events. The input of the default setting is the regular time.3, the farmer's knowledge is stored in a buffer with a fixed length, and the U-like sample buffer can be implemented using a shift register. # 次 Cover two = cry

Page 12 534976 V. Description of the invention (8) Monitoring the rotation of the detector and writing its current state to the shifter is split across two bytes, and then the test is compared by comparing the two halves. For example, if the sample rate is the speed of the tool, the weighting pattern is shifted through two 8-bit registers, and when the: lattice of each sampling result of σ is displayed as high frame. The sample is moved inside the first lattice of the first half of the register. If, register until the synchronization event is entered, the sample is passed through the register. Duo 7 L passes the register. If the first lattice, i of the second half of the register does not occur, Yu Lin is in the first sample. When the moving grid receives another high sample, the first crystal signal of the first half of the two re-registers. The same degree of change and triggering have been referenced to the invention of removing the optical measurement of the machine tool, but other forms of optical triggering can be used to explain the broader application. Therefore, the scope of patent of a = device and other types of machines of the present invention is defined. Qianwei shall be treated as an accompanying application

Claims (1)

534976 Case No. 90101781 11 Cang original application patent scope 1 · A method of using, the device method includes rotating the signal below each time; Assess the (11), which is shorter than the generation rule (11) From the detection 2. If you apply for a tool to be real (ti) 3. If you apply for a clock, rotate the cause and the rotation of the tool The detection letter is only inside the device, if the detection uses an optical measuring device The method for measuring the object on the machine tool includes a light source that generates a beam of light to be incident on the sensor. The sequence of steps: the object; when the beam is interrupted by the object, a detection signal is generated inside the detector. , Which includes generating a first time interval that is related to the rotation speed of the object; and a fixed time interval as a time interval (t 2) '(t 2), which starts from the end of the time interval (11); and a detection signal at An output signal is emitted from the detector in the detector at a specific time interval. The method of the first scope of the patent, wherein the object is on the machine tool and the tool is rotated at a known specific speed, and the time it takes for the tool to make one revolution is qualitatively. The method of item 2 of the patent, wherein the device further includes the method further comprising the following steps: tool; pulse initialization sends out a series of short-term pulses, the pulses are synchronized in speed, and the first pulse is sent to coincide with the detector production During the existence of a clock pulse, a detection signal exists to detect the output signal sent by the detector; if such a detection signal does not exist, the clock is suspended. O: \ 69 \ 69199-920110.ptc Page 15 534976 Case No. 90101781 Force year / month, / 0 means amending the scope of the patent application 4. If you apply for a special transfer output, the output will be 5. Pulses, and the occurrence and repulsion; Second line Internal 6. The clock part is not related to 7. Clock individuality; Pulse 8. Generates an hour-pulse period signal. For example, if you apply for the method in item 3 of the method, each pulse of the tool is detected, and the detection is performed only when there is a detection signal between the detector and the clock after the first pulse. When the detector generates a step pulse clock number, the first line is between the first and the first test pulses, and if the 4 clocks are in line, then it is as applied. The method of this series and the third item of the benefit range, which claims that the device includes the following steps: The detector has not yet been based on a pulse, and the pulse range of the device is included in the profit range. Please use the special method to cause the pulse to include the following range. When a signal is detected during the initialization, the time interval between the initial two consecutive pulses of the first clock is generated. The detector generates the second series of pulses during the initialization of the second clock. The first series of pulses sends out an output signal. During the first period, if the detection signal also exists in the output signal of the detector. The method of item 5, wherein the device includes additional steps. If the detector generates detection signals and all of them are in operation, the method of item 5 is sequentially initialized and issued. The device includes additional steps. Pulse pulses are generated at different frequencies and are set to coincide with the different rotation speeds of the tool. The optical device of a series of measuring machines suitable for the rotation speed of the tool is issued, and includes a light source for O: \ 69 \ 69199-920110.ptc Page 16 534976 Case No. 90101781, month / 0 amended 々, patent application scope to generate a beam, and a detector to receive the beam, and a signal when the beam is interrupted The detector includes a detection circuit that generates a signal each time the light beam is interrupted; and a signal processing device for evaluating the occurrence of such signals, and only those generated by the detection circuit. The second signal is output only when it is generated within a predetermined time interval after the signal occurs. 9. The optical measuring device according to item 8 of the patent application, wherein the object is a tool on a machine tool. O: \ 69 \ 69199-920110.ptc Page 17