TWI221925B - Apparatus and method for examining insulation of circuit board - Google Patents

Abstract

A kind of insulation examining apparatus is disclosed in the present invention, which adds DC voltage in between the wirings of circuit board to conduct the examination of insulation characteristic of the wirings, capable of truly preventing the circuit board having spark occurrence during insulation examination from being mixed into the circuit boards judged as the excellent products. The variable voltage source 2 of the insulation examining apparatus passes through the switch circuit 4; and a voltage meter 3 is used to measure the voltage added to the wirings Pi at the determined moment after adding a determined DC voltage to the determined wirings Pi (i=1, 2, 3, 4, 5). In addition, a current meter 5 is used to measure the current I flowing between the wirings. A control apparatus 6 calculates the insulation resistance value based on these two measured values so as to determine if the circuit board passes or fails according to the insulation resistance value. However, once there is spark generated in between the wirings caused by the added voltage, the spark detection circuit 7 can be used to check whether the spark is occurred or not. Thus, the circuit board having the occurrence of spark can be directly judged as the unqualified product by the control apparatus 6 without using the insulation resistance value to judge whether the circuit board is qualified or not.

Description

1221925

The present invention relates to a display method of the technical field. The present invention relates to a printed circuit board, a circuit board, and an insulation inspection circuit board such as an electrode plate stolen by a Chinese ion-seeking plasma. The prior art circuit substrates are usually To check whether the insulation is good or not, to check the circuit base. In recent years, for electrical insulation inspection devices with multiple wirings, the wiring of each wiring and other wiring is good (whether sufficient insulation is guaranteed). Product. Fig. 4 is a six-tone diagram of the basic structure of a conventional insulation inspection device. The insulation device 100 includes: a variable voltage source 101 for applying a high voltage V (for example, 20 0 V) between the contacts of the test object pi and p2, and for measuring between the wirings Pi and P2. Voltmeter 102, switch 10 connected to the above wiring, ^ ammeter for measuring the current I flowing between the distribution lines P1, P2, 〇04, and based on the voltmeter 102 A control device 105 that calculates a resistance value R (v / 丨) from the V and I output from the ammeter 104 and determines whether the insulation status is good based on the resistance value R. In this insulation inspection device 100, once the switch 103 is turned on by the control device 105, the output voltage of the variable voltage source 101 is applied between the wirings p2 and P2. The measured voltage value between the wirings PI and P2 and the current value flowing between the wirings P 1 and P 2 measured by the electric circuit 104 are input to the control device 105. Control device 105 applies an output voltage of variable voltage source 101 between wirings P1 and ρ2, and then

1221925 V. Explanation of the invention (2) —-------- The detected voltage value v and current value ί Calculate the wiring resistance values (insulation resistance value) R = V / I, and judge This insulation resistance 1 is judged whether the circuit is good or not by being electrically above a predetermined threshold value Re f which is set in advance. That is, when the insulation resistance value R is at the critical value Ref and the substrate is 'the control device 丨 05 judges that the insulation condition f between the wirings p 丨 and p2 is good' and when the insulation resistance value R does not reach the critical value R ef, Control; it is judged that the insulation between the wirings p 1 and P 2 is defective. ^ After the output voltage of the variable voltage source 丨 〇i is applied between wirings P1 and P2 ', it is not immediately judged whether the insulation is good or not, because, as shown in Figure \, between wirings P1 and P2 Immediately after the voltage v is applied, the voltage between the wirings is still in an unstable state (the area where the voltage rises in Fig. 5 (a) =), and there is a large transient current between wirings P 丨 and P2 for an instant. It flows, therefore, it is necessary to determine whether the insulation status is good after the voltage between the wirings P1 and p2 is stabilized at the applied voltage v and the current is also stable at a predetermined time t2. SUMMARY OF THE INVENTION The problem to be solved by the invention, however, is that “Because a high-voltage DC voltage is applied between the wiring p 丨 and p2 of the inspection target, such that after the voltage is applied until a predetermined time t21. Elapses,” it will appear between the wiring and the wiring. A spark phenomenon occurs, and therefore, there is a problem that an insulation resistance value between the wirings P1 and P2 changes. For example, in Figure 5, if a spark occurs at time t 丨, as shown by the dotted line a, the voltage between the wiring will drop sharply in an instant, and then

1221925

It rises again, and at the same time, as shown by the dotted line B, a large current flows at an instant, and the insulation resistance value! ^ Increases gradually after the spark occurs almost at 0. '

After the spark occurs, the voltage between the wirings rises toward the applied voltage ¥ and the current flowing between the wirings P1 and ρ2 decreases. Therefore, the insulation resistance value r between the wirings PI and P2 increases. However, since the insulation resistance value R is changed due to fire, as shown by the dotted lines C and D, the increased waveform is also in an unstable state. In this way, as shown by the dashed line ^ At the inspection time t2, if the insulation resistance value R is above the critical value Ref, the circuit board can be broken as a good product. As shown by the dashed line D, the insulation resistance value r is higher than the value of Re If it is small, the circuit board is judged to be defective. 1 Because the spark resistance causes the insulation resistance value r to be smaller than the critical value Re f, Gen: It is a conventional insulation inspection method, and it can also be judged at the detection time "= Γ defective products, so there is nothing in this situation In particular, for the case where the above-mentioned insulation resistance value R is above each value Ref, as shown by the dotted line C, due to the conventional insulation inspection method, 4 ϊ ί ί ΓB! t2 judges the circuit board as a good product. Therefore, in the circuit board with a good product name, 6 due to the occurrence of sparks during the insulation inspection 4

The circuit substrates whose edge resistances seem to change, and the circuit boards which are not such ΓίΓ are all mixed together. Release caused by spark generation ^ The circuit board that is changed will be somewhat restrained by the occurrence of spark. t :: f. Therefore, compared with the circuit board that does not generate sparks, the electric power is: ϋ ΐ Yes: it will appear on the circuit board after it is lowered "" ^ ° 卩Base phase

1221925

When the circuit board is defective due to mechanical fatigue, it is caused by thermal, electrical, or other problems. The occurrence of an inferior product that has been judged to be an inferior product by the insulative device has caused the inferiority of the insulation inspection device to be reduced. Because of &, it is necessary to try not to let the "results occur" to cause the insulation resistance value R to change-the circuit boards in this case are mixed together, " · board ^ not the circuit board In order to solve this problem, it is determined that the product is of good quality = to provide a kind of insulation inspection of the circuit board = do not ensure that the circuit base that has sparked will be used to solve the problem. At this time, the resistance value is included according to the resistance value flowing between the wires. The cremation detection is detected by the test device between the wirings. According to this inspection method, the voltage between the distributions is the sum of the insulation test wirings. Because of the judgment, the state is judged. At the given fixed time, check whether the electrical voltage applied to the wiring is good. Apply the device, and cut off the direct current of the invention. The quality of the spark check is good. The sum of the insulation check wiring is determined by the pressure of the circuit board, and the above-mentioned voltage value and current value are used to determine the circuit device. Incoming sparks; when a spark is applied between two other shaped wires, the resistance between them is good when the voltage of the wiring is stable, and its characteristics are described by the voltage. Not the voltage of the circuit board, above the above voltage value

2014-5547-PF (Nl) .ptd Page 8 1221925 V. Description of the invention (5) The value of the current flowing between the above wirings caused by the voltage, whether calculated = the resistance value between the lines, and then based on this resistance The circuit 2 is judged to be good by a value, and is characterized by detecting a j V step that occurs between the wirings because the voltage of the applied voltage is stable, and once a spark is detected, the circuit based on electricity is not affected. Whether the substrate is good or not, the steps of the circuit substrate are judged. According to the above invention, a predetermined voltage is applied between the wirings, and when the voltage between the wirings is stable at a predetermined time, the voltage value V between the lines and the current value 1 flowing between the wirings, = ^ Adjust the detection value meter to distinguish the insulation resistance value R between the wirings. ^ Compare this insulation resistance ㈣ with a preset threshold Ref to determine whether the circuit board is good. In other words, if 2 Γ is above the critical value Ref, the circuit substrate is judged to be excellent. If the insulation resistance value R is smaller than the critical value Ref, the circuit substrate OU ° is broken: and the circuit is judged according to the above insulation resistance value. Substrate: During the inspection, a predetermined voltage is applied between the wirings = the voltage between the wiring = the predetermined time of stability, the fire occurs between: =, and its spark can be detected, according to the resistance Values • Determine whether the circuit board is directly judged as a defective product. As a result, there is a possibility that the circuit board, which is judged to be a good product by the insulation inspection, may have a spark in the circuit board. Calculate the spark resistance caused by the upper substrate and the defective product. The current voltage is detected and then compared with I. If the product is defective, it is defective insulation. Once the circuit is installed, the circuit will not pass.

2014-5547-PF (Nl) .ptd Page 9

6. Description of the invention (6) Furthermore, when the predetermined DC voltage is applied between the above-mentioned configurations of the circuit board insulation inspection device of the present invention, the small-area wiring can be applied to two places to apply the DC voltage. In this way, when a predetermined DC voltage is applied between the wirings, the wiring with a small area is applied as a high potential to apply the DC voltage. Therefore, the spark current flowing when a spark occurs is used as the wiring with a large area. In the case of a high potential, it is possible to reduce damage to wiring and the like caused by generation. At m ΐ and because DC voltage is applied, it takes i 配线 = to the voltage between the wirings. The time required is better than the case where a large area wiring is used as a high potential. The second aspect is the resulting voltage change. The area is small ... In the case of flowers, Jiang Aa Hall uses the change in voltage to detect fire and detect sparks. The small wiring can also be accurately detected as a high potential. Furthermore, the lightning device of the present invention includes an operation device for changing the m-plate inspection device, and can also describe a predetermined time. In addition, at the time when the circuit board is good or not, it can be determined in advance f 2 whether the circuit board is good. Based on this feature, it is good to judge. The above-mentioned operation device delays the time to monitor whether the circuit board is good. Is there a fire: the case 'because there can be a longer period of reliability to be improved. And so, in the case of products (circuit boards), because the inspection time is shortened, the inspection time can be improved. Therefore, the inspection efficiency can be improved. 2014-5547-PF (Nl) .ptd Page 10 V. Invention (7) _________ rate. Therefore, 'the set time for judging by setting an operating device' can take into account whether the production of the σ ^ circuit board is balanced or not 'freely setting the above-mentioned predetermined timing: the reliability and the inspection effect. Moreover, the circuit board of the present invention The insulation inspection and detection device may further include the above-mentioned spark device for detecting u, ... a voltage detection and judgment device for judging the core when the applied voltage suddenly drops. Specifically, the above-mentioned spark detection: the signal of the second spark and the current signal; and the method of checking the insulation of the on-board substrate may be based on the application of the above-mentioned electricity. Based on these characteristics, ordering can be accurately and efficiently detected. J to the occurrence of cremation Moreover, once the circuit board of the present invention has an absolute process control device, once it is detected by the spark detection device, it can be detected that there is a spark, and the insulation inspection method of the board is also-once inspected according to this feature: Because of the inspection process. If a spark occurs, you can save it. A: It is detected that the circuit board being inspected is “from”, go to the subsequent inspection warehouse, and have a better inspection efficiency when inspecting many circuit boards, especially in the implementation. Schematic representation Γ: The knot of an embodiment of the insulation inspection device of the present invention 1221925 V. Description of the invention (8) The inspection device 1 is used to distribute τ 'on a circuit board (not shown). The technology that has been described in the technology, is the insulation state of mλ good? When it is confirmed that all the wirings P1 to P5 and other wirings are in good insulation condition, then it can be =: electrical? The substrate is a good product, and if there is only one part with poor insulation, the circuit board is judged as a defective product. In addition, in order to solve the problem caused by the occurrence of the above-mentioned sparks, a type of sparks between wirings can be detected during the insulation inspection. 2 When a spark is detected, it is determined that the circuit is a good product. structure. The edge inspection device 1 has a variable voltage source 2, a voltmeter 3, a switch circuit 4 connected to wiring P1P5 on a circuit board that is not shown in the drawing, an ammeter 5, a control device 6, a spark detection circuit 7, D / A converters 8, 1 convert 9 and 10. Further, the D / A converter 8 converts a control signal (numerical signal for controlling the output voltage) output from the control device 6 to the supportable voltage source 2 into an analog signal. The A / D converter 9 is input from the voltmeter 3 to the control device 6 and the voltage detection signal (analog signal) is converted into a numerical signal. The a / d converter 10 is input from the ammeter 5 to the control device 6 The current detection signal (analog signal) is converted into a numerical signal. Basically, the inspection device 1 is basically formed by adding a spark detection circuit 7 to the conventional insulation inspection device 100 shown in FIG. 4. That is, the variable voltage source 2, the t-voltage gauge 3, the switching circuit 4, and the current of the insulation inspection device i. 10 and the control device 6 correspond to the variable voltage source 101, the voltmeter 102, the switch circuit 103, the ammeter 104, and the control unit of the insulation inspection device.

5. Description of the invention (9) The manufacturing device 105 is basically the same in function of each component, although the conventional insulation inspection device shown in FIG. 4 is used. Lei took Lei as an example to explain the detection principle, but in reality, it is based on 2 拫: a lot of wiring is formed on the substrate, according to the same as above: check the insulation state between each wiring, which is the 5 phase of the technology The principle is to check the board: the sample is for electricity with a lot of wiring: its = 仃 check 'but 疋' in order to explain its inspection principle = roadbed, root, as described below, from the wiring: '': number 仃, and Close to conduct insulation inspection. Of course, the wiring of Yoshida can also detail this inspection principle. ,. For most wirings, P1 and P2 are straight wirings with contacts at both ends, and wiring core 5 is a cross-shaped wiring with 4 contacts. Areas of I line P1, big endian

Pl = P2 < P3 < P4- P5 The content of this area will be described in detail later. And 'based on the number of wirings, 关 y, the closed circuit 1❹3 is the same as the open circuit in 100, which is constructed by a "solid switch." In the present embodiment, the structure of the = 4 circuit is Switching group switch SWi (i = i, 2, 2, ... 5)

The variable electrical transfer switch is a switch T1 (1 = 1, 2, ... 5) connected to each of the two voltages minus 2 of _i (i = 1, 2, ... 5) and the current "J ^ " Λι tT, J 〇 Fixed electricity: (change the ink source f: is used to apply the existing electricity to the wiring of the inspection object [(M is referred to as the test voltage), and the heart is converted by the electricity converter 8]

1221925 V. Description of the invention (10) The output voltage of the control signal of the converted control device can be controlled. The voltmeter 3 'is used to measure the voltage of the high-potential wiring and the low-potential wiring. The voltage information measured by the voltmeter 3 is input to the control device 6 after being A / D converted by the A / D converter 9. in. The switch circuit 4 can be connected to / disconnected from each of the wirings '' = insulation inspection device 1 according to the preset combination as described above, with the wires P1 (1, 2, ... 5) as the inspection target wiring. The switch group switch SWi includes a positive switch n connected to the variable voltage source 2 and a negative switch M1 connecting SW2 to a current meter 5. Similarly, the transfer switch π Μτ? Ι will be wired? 2 ~ P5 are positive poles connected to the variable voltage source 2 = ~ M and negative poles connecting wirings P2 ~ P5 to the ammeter 5 = M2 ~ M5. Each of the switching circuits 4 to 5 to 5 is controlled by the control unit 6 to control its switching. The ammeter 5 'is used to measure the A / D conversion after the converter 10 is applied, and is input to the control device 6; the spark check circuit 7 is used to detect the cause of blooming. As shown in FIG. 5 (a), once a spark occurs due to “voltage application”, the output voltage of the variable voltage source 2 is “two voltages V” and this voltage & change is detected. , -'So'pass = circuit 7, for example, the sample hold circuit fire and chemical conversion ratio can occur. The sparks are composed of voltages that can be formed at predetermined cycles. Sampling and comparing the previous voltage signal with the voltage signal from ^ / I. Once the lower and upper voltage signals of the voltage waveform are detected, the voltage is reduced (this time the voltage is $ 14 compared with the previous electricity. 2014- 5547.PF (Nl) .ptd 1221925 V. Description of the invention (11) If the pressure is low), it will output the signal of spark occurrence. This spark detection signal 'is input to the control device 6. The control device 6 includes a switching control device 61 that performs on / 0FF (on / off) switching of each of the switches τ 1 to T 5 and M 1 to M 5 of the switching circuit 4, the voltage value detected by the voltmeter 3 and the detection by the ammeter 5. Resistance value calculating device 6 for calculating the insulation resistance value R based on the calculated voltage value 2. Judging device 6 for judging whether the insulation status is good or not according to the resistance value R calculated by the resistance value calculating device 6 2 and the signal output by the spark detection circuit 7 .

In this embodiment, as shown in Table 1, the switching control device 6 丨 performs switching control of 0 N / 0 F F on each of the switches T1 to T5 and M1 to M5. Table 1

SW1 SW2 SW3 SW4 SW5 T1 Ml T2 M2 13 M3 T4 M4 T5 M5 1st ON — — ON — ON _ ON ON 2nd — — ON — ON ON ON 3rd — — — — — ON __ ON ON times — — — — — —— ON — — ON

That is, in order to check the insulation status of the wiring P1 and other wirings P2 to P5 'After all the switches M2 to M5 are turned on (ON) and the wirings ρ2 to P5 are at a low potential, the switch T1 is turned on to make the wiring P 1 is at a high potential (first inspection). Thus, in this embodiment, the insulation inspection between the wirings p i and p 2, p 1 and p 3, p 1 and P 4, and p 1 and p 5 can be performed simultaneously. this is

221925 V. Description of the invention (12) Because the insulation inspection device of this embodiment does not detect which wiring has a spark, if the spark is detected, the circuit board is regarded as Good quality is used to distinguish, so it is enough to detect sparks between any wiring. In this way, since the insulation inspection between P1 and other wirings P2 to P5 can be performed at the same time, the insulation inspection of wiring P1 and other wirings P2 to P5 can be completed by i times. Insulation inspections are required for five inspections, which can greatly reduce the time required for insulation inspections, but less than a day. 'The same applies to the second and subsequent inspections. Secondly, in order to check the insulation of the wiring P2 and other wirings P3 to p5, after all the switches M3 to M5 are turned ON, and the wirings P3 to p5 are at a low potential, the switch T 2 is turned on to make the wiring p 2 High potential (2nd check). Here, the switch is not turned on ... because the wiring PI and P2 have been inspected for insulation during the jth inspection. Next, 'to check the insulation of wiring P3 and other wirings P4 and P5', while turning on switches 乂 4 and M5, and make wirings P4 and P5 at a low potential, 'turning on switch T3 brings wiring P3 at a high level Potential (3rd check). Then, in order to check the insulation status of the wiring P4 and the wiring P5, while the wiring P5 is turned on to make the wiring P5 at a low potential, the switch T4 is turned on to make the wiring P4 at a high potential (the fourth inspection). Regarding the control of ON / OFF (ON and OFF) of each of the above, the following points are also considered. # 由 = 配, Pl ~ p5 each have electrostatic capacitance, and the positive voltage corresponding to the voltage Vsps (refer to Figure 5) at the beginning of the ignition and the spark is about to start.

1221925 V. Description of the invention (13) The wiring (panel voltage) h which is charged to the potential is h, Bomin arg and the " wiring of the positive contact of the electric inspection / original 2) because of the electrostatic capacitance and The wiring surface assumes that when a larger wiring area is used as a high voltage, and a smaller wiring is used as a high potential, T m and the area voltage is VSPS, but the electricity is G: so that the same spark starts. Post W. m 〇_ Electricity to the former (that is, larger area ^ ,,, ^ When the wiring with a larger area is used as a high potential, the spark current will be larger than that when the wiring with a smaller area is used as a high potential. Once a large spark current flows, the wiring and the like are subjected to a large load, which may cause damage to the wiring and the like. In addition, when a large-area wiring is used as a high potential, and a small-area wiring is used, When the wiring is compared with a high potential, the time required for the latter to rise to the voltage V is shorter than that of the former. In this way, a wiring with a small area is regarded as a high potential, and a wiring with a large area is regarded as a high potential. For example, it is possible to judge the time in advance, thereby shortening the inspection time. In addition, the voltage change caused by sparks (that is, the difference between Vsps and "...), the wiring with a large area is smaller than the wiring with a small area. The spark is detected based on the change in voltage, so if a large area is set as a high potential, it is difficult to detect the spark. Therefore, in this embodiment, the test In consideration of the above situation, when conducting the insulation inspection as described above, the wiring with a small area is made high and the wiring with a large area is made low. ^ 'For example, in the first inspection of Table 1, it is Use other wiring with larger area than P2 ~ P5 to switch on the negative switch to low potential, and wiring P1 with small area to switch on the positive switch to high potential. F 1221925 V. Description of the invention (14) Steam leaf 5 resistance Value: Ten calculation device 62 'Calculate the resistance value r (= v / i) based on the measured voltage v and the electric grip of the voltmeter 3 and the measured current I of the tenth 5! The test voltage ^ f 63 has a timer 63a 'Use this timer 63a to calculate the time elapsed from the time of the trial connection Γ to the time t0 between the wiring, and calculate it from the thunder in the wiring # 私 杂 — &# 士 ^ T iBi Figure 5) At a predetermined time t2 in the PΦ Γ state (referring to the small φ for private sale, the large φ of the peak value of the Γ peak resistance value R and a predetermined threshold value Rre f), to determine whether the insulation state is good. That is, When the resistance value R is in the 'Putian. Ten # insulation state is the bad threshold Rrefj ", Judging whether the wiring room is good or not: In the case of the break 3, the insulation state Rfi is above the insulation resistance value Rfi. When the spark detection from the spark detection circuit 7 is detected, the second is the insulation resistance value. ^ The insulation state is judged to be due to the insulation characteristics of the circuit board due to the occurrence of the insulation inspection. JL :: This reliability is not reliable. The circuit board judged to be a good product by the taste inspection. And :: The second pass of the inspection method Γ is used as an example to set the S 1 S 5 Λ i ^ t to be applied between the wiring contacts of the inspection object for the electric power station II added in this embodiment. ^ ^ ^ ύ W 丄 ύ WD's 5 conditions, will switch the negative switch M i (i = l, 2014-5547-PF (Nl) .ptd of the bamboo switch circuit 3) Page 18 1221925 V. Description of the invention (15 ) '2, ~ 5), the positive switch τ i (bu 1, 2, ... 5) is turned on in sequence (step # 2, # 3), and the test voltage is applied between the wirings to be inspected, and the timer starts 6 3 a timing (step # 4). Secondly, once it reaches the predetermined count value (count value corresponding to time t2) (step # 5), measure the voltage value v and current 丨 (step # 6), and then calculate the insulation based on this voltage value V and current I Resistance value R (step # 7). Then, it is determined whether a spark occurs (step # 8), and if a spark occurs (YES in step # 8), it is determined that the circuit board is defective (step # 9). On the other hand, if no spark occurs (发生 in step # 8), it is judged whether the calculated insulation resistance value r is above the critical value Rref (step # 10). If the insulation resistance value R is above the critical value (YES in step # 1〇), it is judged that the insulation condition between wirings is good (step # 1 丨). If it is below the critical value Rref (NO in step # 1〇) , It is judged that the circuit board is defective (step # 9). 4 And 'check the 4th time (between wiring P4 and P5) in Table 1, if w ##################################################### The above process is repeatedly performed for the remaining number of inspections. '= If all the inspections shown in Table 1 are completed, the above process is terminated (YES in step # 1 2)' and the circuit board is judged to be a good product (step # 丨3), the entire insulation inspection is completed. This is because the resistance value R can be calculated at a predetermined moment when the voltage of the wiring is in a stable state. By comparing the resistance value r and the Z of the critical value Rref is small, it can be judged whether the insulation status of the wiring is good. A spark that occurred between the wiring was detected before performing the above and judgment. Since check out 2 ^

2014-5547-PF (Nl) .ptd 1221925 V. Description of the invention (16): When it takes time, the circuit board is directly judged to be defective & therefore, it can be due to the beauty of the circuit judged to be a good product} Φ ^ ^ ^ ^ ^ Blade circuit boards are mixed with circuit boards that cause changes in insulation resistance due to cremation during insulation inspection and circuit boards that are not in this case. Under the reliability of the circuit board caused by the I board, and in the above-mentioned embodiment, the predetermined time when the count value reaches the value, that is, when the voltage of the wiring is in a stable state, is the second spark 5 occurred? . However, it is not limited to this embodiment, and it is also possible to judge that the circuit board is a defective product when a fire occurs. That is, as shown in FIG. 3, after completing the processing of steps # 21 to # 24 that are substantially the same as the processing of steps # 1 to # 4 in the above embodiment, it is determined whether a spark occurs (step # 25) If no spark occurs in step # 25, the circuit board is judged to be defective (step # 33). In addition, if no spark occurs (YES in step # 25), when the count reaches the previous value (step # 2 6), measure the voltage value v and the current value 1 (step # 27), and then according to this The voltage value v and the current 1 are used to calculate the resistance value R (step # 28). Then, it is judged whether the calculated resistance value r is above the critical value Rref (step # 29). If the above resistance value! ^ Is above the critical value (Y ES of step # 2 9), it is judged that the insulation condition of the wiring room is good (step # 30), and the above processing is completed if all the inspections are performed (Y ES of step # 3 1) 'then judge the circuit The substrate is a good product (step # 3 2), and the insulation inspection is finished. If the resistance value r is smaller than the threshold value (NO in step # 29), it is determined that the circuit board is defective (step # 3 3). However, cremation is not limited to the transition period (voltage

2014-5547-PF (Nl) .ptd Page 20 1221925 V. Description of the invention (17) Rising period), or it may happen during the voltage stabilization period. In this case, as described above, a circuit board having a spark in the stable period up to time t2 will be judged as a defective product. However, if a voltage is continuously applied after time 12, For circuit boards that still have sparks after t2, if the insulation is determined to be qualified at time t2, it will also be judged as a good product. XI, it is mixed in the circuit board that is judged to be a good product. For example, the inspector of the shipping destination of the circuit board is later than the road substrate, and once the number of defective products is relatively large compared to the number of good products' It will damage the reliability of the product (circuit board). For this example, the judgment of the insulation inspection device must be postponed to monitor the occurrence of sparks. It takes a long time, but in this case, the reliability of the product L Λ tracing wood m / because the time required for a single insulation inspection is privately added, which also leads to a reduction in inspection efficiency. Temple 1 said that the i-Pantong, ^, 繁, which is the opposite of this, requires that the structure of the above embodiment be implemented one by one. As indicated by the dashed line in FIG. 1, the inspector uses # 再 -1 device 11 and a time setting device 64 arranged in the control device: two. Inspector VIII: More time to check the accuracy (reliability of the product) and inspection efficiency ::; == the required inspection device 1! To change, to judge the time 1: to: use the operation button to perform, For example, L ,, and so on can be benchmarked by a group of people to delay the judgment of the time, which can be benchmarked; two women and women can be judged in advance or in a predetermined unit, and the time of judgment is tied between 1 f or delayed. t 2

1221925 V. Description of Invention (18) Structure. According to this result, as shown in FIG. 5, when the time 13 is set to be seven of the given time from the current time 丨 the postal student is ten shi m ^ $ — a when Shili Nu thinks that ^ break time, because it can be detected The sparks that are not detected in the above-mentioned examples, particularly μ + 〇uw λ ^ ′, occur between time t 2 and time 13 (as shown by the dotted line E), so that the spleen φ μ mosquito 1 < If the circuit board is judged to be bad, it can reduce the above-mentioned force snow rose basin α ^ ^ ^ 7 at the circuit board shipping destination, and then perform insulation inspection on the substrate again. Immediately, you can eliminate the circuit board that is judged to be a defective product like 0, so that you can improve the reliability of the product. ADVANTAGE OF THE INVENTION According to the electrical insulation resistance applied to the wiring, the good quality product is broken, and when the voltage is high, the circuit-based DC voltage between the wiring wires is caused by the current nose. As a result of this distribution circuit, sparks are generated in order to secure the circuit board in the present invention, and a small amount of flower arrangement occurs at the time. In addition, it is necessary to determine the current value of the current according to the present invention to determine whether the electricity between the lines can be obtained, based on the fact that the surface of the voltage loss is stable, such as fire, and electricity. At the same time, when the board between the wires is live, prevent the connection, and mix in. Because the wire is flowing, this time, and because of the time margin check, the insulation of the root is good, and it can be directly passed by the high potential spark electricity based on the spark wiring. Reduce the application ratio to the surface device, this application is based on the applied resistance value, and when it is judged that the electrical resistance value occurs, the applied current is less due to the fire and direct current product due to the voltage and detection caused by the wiring voltage. The circuit board was judged because the circuit board to which the voltage was applied was not judged. The above-mentioned direct current is induced by the large area of the flower, and then the distribution line is used as the south

Note that the situation of the potential is shorter, which reveals whether the substrate is good or not, so that it can judge the electrical moment according to the above resistance value in advance, thereby shortening the inspection time. Moreover, in the case of detecting sparks based on the change of thunder-strain kmr ^ ^ ^ pi i, the electric power of φ,, 缍,, 吴, 吴, and 化 due to the occurrence of prisoner changes frequently, and the wiring with a small area is larger than the area. Since the self-wiring line is large, it is possible to reliably detect a spark by using a small-area wiring as a high potential. In addition, the present invention is also provided with an operating device for changing the above-mentioned predetermined time for judging whether the circuit board is good or not, so that the balance of the product #reliance and the inspection effect can be taken into consideration, and the above-mentioned predetermined time can be freely set. The standard 1221925 is based on a simple diagram. Figure 1 is a schematic structural diagram of an embodiment of an insulation inspection device according to the present invention. Figure 2 is a flowchart of the insulation inspection method. FIG. 3 is a flowchart of another embodiment of the insulation inspection method. FIG. 4 is a schematic structural diagram of a conventional insulation inspection device. Fig. 5 is a schematic diagram showing changes in voltage between wirings, current flowing between wirings, and resistance values. DESCRIPTION OF SYMBOLS 2 Voltage source 4 Switching circuit 6 Control device 8 D / A converter 1 0 A / D converter 6 1 Conversion control device 6 3 Judging device 6 4 Time setting device 1 0 1 Voltage source I Insulation inspection device 3 Voltmeter 5 Ammeter 7 Spark detection circuit 9 A / D converter II Operating device 62 Resistance value calculation device 6 3 a Timer 1 0 0 Insulation device 102 Voltmeter 1 0 4 Ammeter 1 0 3 Switch 1 0 5 Control device

2014-5547-PF (Nl) .ptd Page 24

Claims (1)

1221925 VI. Application for patent scope 1 · An electronically set DC voltage moment, according to the resistance value of the electricity flowing between it and its characteristics. If a judging device is generated between the spark detection jjfC wiring, judge the 2. Among them, the wiring with a small area 3. If an application is set, and the operation at a predetermined time is also set. 4. If an application is set, where a voltage detection spark is judged to occur. Insulation inspection device for circuit boards, in the wiring, the voltage between the above-mentioned wirings is stable ~ 1. The above-mentioned voltage value is applied and the predetermined current value of "2 'caused by the applied voltage is used to calculate the above-mentioned wiring judgment between the above-mentioned wires. Whether the circuit board is good, and the value '1' is based on the following: the device is used to detect the spark generated by the input; and "the voltage is caused by the sergeant-the above-mentioned spark detection device detects the circuit board as a defective product. ~ The insulation test of the electric jump Ak electrical substrate of the 'Huahuafa patent scope of item 1' When a force is applied between the above wirings σ $ μ #_ — 衣 h A ^ When the knife has a DC voltage, Jiang as Surface potential to apply the DC voltage. The first ten sisters of the scope of patents 1 and 2 include the above-mentioned operating device for changing the judgment of whether the technology is not good or not, and the circuit board is good. The spark detection device for the insulation inspection of the circuit substrate in the first item of the patent scope includes: a device 'for detecting the above-mentioned applied voltage; and a rotation device, when the applied voltage suddenly drops, it is judged that there is a spark. A substrate insulation inspection device, wherein the above-mentioned spark detection device includes: a sample hold wave device, and the applied voltage is sampled at a predetermined cycle 2014-5547-PF (Nl) .ptd Page 25 1221925 The comparison device compares the previous signal with the current signal. 6 · If the insulation inspection equipment of the circuit board in item 1 of the patent application scope includes a process control device, when the spark detection device detects that a spark has occurred, the subsequent inspection process is not performed, and Inspection of circuit boards.疋 ,,, and the fixed time, the current flow based on the detection and issued the circuit based 8. Method, which is in advance 9. Method, which is 10 methods, whose inspection work, ancient = Erling 丞 board insulation The inspection method is to apply ^ chengjian between the wirings, and the voltage between the wirings is stable &amp; &amp; ^ ^ The current value in the above-mentioned distribution caused by the voltage, clock 笪 ψ μ, +, π is Dagger line y Shi X. t differs from the resistance value between the above wirings, and the A resistance value is used to determine whether the circuit board is good. It is further characterized by including the following steps:... Stably produce sparks between the above wirings; and I is at %%. Once a spark has been detected, I ^ ^ ^ a ^. If it is not good, judge whether the adhesion is good or not based on the resistance value. It is judged that the meat judgment such as towel | j | ^ The substrate is defective. In Jiaming's profit-seeking yoke item No. 7, the circuit board is judged to be arbitrarily set on the magnetic circuit A + μ and the insulation inspection method of the circuit board. For a good time, you can detect the occurrence of sparks by detecting the voltage applied to the insulation inspection of the circuit board as in item 7 of the scope of patent application. In the process, the insulation inspection procedure of the substrate with sparks was detected. X T, end the circuit board