Measuring device

Abstract

The present disclosure addresses the problem of improving a measuring device such that, for example, measurement conditions are set satisfactorily.　In a measuring device according to the present disclosure, measurement conditions are set automatically on the basis of pre-stored information relating to an electrical characteristic of an object itself. This enables the measurement conditions to be set satisfactorily, by, for example, enabling measurement condition setting errors to be satisfactorily suppressed.

Description

Measuring device

[0001] The present disclosure relates to a measuring device for measuring the electrical characteristics of an object.

[0002] Patent Document 1 describes a measuring device that measures the electrical characteristics of an object according to measurement conditions. In the measuring device described in Patent Document 1, measurement conditions such as the measurement speed and the number of measurements of the object can be set by an operator's operation.

[0003] Japanese Patent Application Laid-Open No. 2013-83565 Summary of the disclosure

[0004] Problems to be solved by the present disclosure

[0005] The problem of the present disclosure is to improve the measuring device, for example, to ensure that the measurement conditions are set properly. Means, actions, and effects for solving the problems

[0006] In the measuring device according to the present disclosure, the measurement conditions are automatically set based on information regarding the electrical characteristics of the object itself stored in advance. As a result, it is possible to satisfactorily suppress setting errors in the measurement conditions, etc., and to ensure that the measurement conditions are set properly.

[0007] Perspective view of a measuring device which is an embodiment of the present disclosure. Perspective view of a mounting machine including the above measuring device. Cross-sectional view of a main part of the above measuring device. Diagram conceptually showing a part of the above measuring device. Block diagram conceptually showing the periphery of a control device of the above mounting machine. Flowchart showing an electrical characteristic acquisition program stored in a storage unit of the above control device. Flowchart showing a part of the above electrical characteristic acquisition program. Diagram conceptually showing the relationship between the nominal value and the variation of the electrical characteristics of a measurement object by the above measuring device. Modes for carrying out the present disclosure

[0008] Hereinafter, a mounting machine including a measuring device, which is one embodiment of the present disclosure, will be described in detail with reference to the drawings. The mounting machine shown in Figure 2 is for mounting components onto a circuit board and includes a main unit 2, a circuit board transport and holding device 4, a component supply device 6, a head moving device 8, a measuring device 10, etc.

[0009] The circuit board transport and holding device 4 transports and holds the circuit board (hereinafter abbreviated as "board") P in a horizontal position. In Figure 2, the transport direction of the board P is the x-direction, the width direction of the board P is the y-direction, and the thickness direction of the board P is the z-direction. The y-direction and z-direction are the front-to-back and up-and-down directions of the mounting machine, respectively. These x-direction, y-direction, and z-direction are orthogonal to each other.

[0010] The component supply device 6 supplies electronic components (hereinafter abbreviated as "components") s to be mounted on the substrate P, and includes a plurality of tape feeders 14, etc. The head moving device 8 holds the head 16 and moves it in the x and y directions. The head 16 has a suction nozzle 18 as a component holder, a nozzle height sensor 20 (see Figure 5), a lifting device, etc. The suction nozzle 18 suctions and holds the components s. The nozzle height sensor 20 detects the height of the suction nozzle 18. The lifting device moves the suction nozzle 18, etc., in the z direction (up and down direction) relative to the head body.

[0011] The measuring device 10 measures the electrical characteristics of a component s, which is an example of an object to be measured, and obtains the measured value. The measuring device 10 is installed on the main body of the substrate transport and holding device 4 via a collection container 26. The collection container 26 and the measuring device 10 are connected by a collection passage 28. The component s whose electrical characteristics have been measured by the measuring device 10 is placed in the collection container 26 via the collection passage 28.

[0012] As shown in Figures 1 and 3, the measuring device 10 includes a main body 30, a holding base 32, a pair of measuring probes 37, a holding base moving device 40, a movable probe moving device 41, a measurement value acquisition unit 42 (see Figure 5), and the like.

[0013] The main body 30 is held in a position that allows for relative movement within the collection container 26. An opening 30a is provided at the bottom of the main body 30, which communicates with the collection passage 28 (see Figure 3).

[0014] The holder 32 is capable of holding a component s and includes a component mounting section 44 and a mounting section holder 46 that holds the component mounting section 44. A V-groove 44c is formed on the upper surface of the component mounting section 44, on which the component s is placed. The component mounting section 44 can be manufactured from a material having conductivity, wear resistance, etc. The component mounting section 44 is electrically connected to the main body 30 via a plurality of conductive members. Since the main body 30 is grounded, the component mounting section 44 is also grounded. In this embodiment, the component mounting section 44 abuts against the mounting section holder 46, and the mounting section holder 46 abuts against the main body 30 via a stopper 80. The mounting section holder 46, stopper 80, main body 30, etc., are conductive. Therefore, the component mounting section 44 is grounded. As a result, static electricity can be removed from the component s placed on the component mounting section 44. A cover 50 is attached to the holder 32.

[0015] A pair of measuring elements 37 includes a stator 34 and a movable element 36. The stator 34 and the movable element 36 are arranged to be able to move closer to and further apart from each other. The stator 34 is fixed to the main body 30 via a stator holder 55. The movable element 36 is held by the movable element holder 56 at one end (the retracted end). The movable element 36 and the movable element holder 56 are moved together by a movable element moving device 41.

[0016] The stator 34 and the movable element 36 each have opposing surfaces 34f and 36f facing each other, and the part s is clamped (gripped) by this pair of opposing surfaces 34f and 36f. In this embodiment, the opposing surface 36f has a generally triangular cross-section and is movable along the V-groove 44c. In other words, the shape of the opposing surface 36f of the movable element 36 is approximately the same as the shape of the V-groove 44c, and the opposing surface 36f of the movable element 36, the opposing surface 34f of the stator 34, and the V-groove 44c of the holder base 32 are located at approximately the same height. Therefore, the pair of opposing surfaces 34f and 36f can effectively clamp the part s placed in the V-groove.

[0017] Furthermore, in this embodiment, the movable element 36 is a longitudinal member extending in the y-direction (direction of movement), and includes a tip portion 36a including an opposing surface 36f, and a rear portion 36b which is the portion on the rear end side of the tip portion 36a. The rear portion 36b has a shape in which the bottom of the tip portion 36a is cut out. Therefore, the holding base 32 and the movable element 36 are able to move relative to each other. The movable element 36 is also held by the movable element holder 56.

[0018] The support stand moving device 40 moves the support stand 32 and includes an air cylinder 64 as a drive source. As shown in Figure 4, in the air cylinder 64, the inside of the housing is divided into two air chambers 64a and 64b by a piston, and the mounting part support body 46 is connected to the piston rod 66 of the piston. A solenoid valve device 69 is provided between the two air chambers 64a and 64b and the air source 68, air passage 60, and filter (atmosphere). The solenoid valve device 69 includes multiple solenoid valves. By controlling the solenoid valve device 69, the air source 68, atmosphere, and air passage 60 are selectively connected to the two air chambers 64a and 64b. As a result, the support stand 32 is moved forward and backward. Also, when the support stand 32 moves forward, air is supplied to the air passage 60.

[0019] The holder base moving device 40 includes a holder base position sensor 122. The holder base position sensor 122 detects the position of the holder base 32. The solenoid valve device 69 is controlled based on the position of the holder base 32 detected by the holder base position sensor 122.

[0020] The movable element moving device 41 moves the movable element 36 and includes an air cylinder 70 as a drive source. Similarly, in the air cylinder 70, two air chambers 70a and 70b are formed inside the housing, separated by a piston, and the movable element holder 56 is connected to the piston rod 71 of the piston. An air source 68, an air passage 60, and a filter (atmosphere) are connected to the two air chambers 70a and 70b via a solenoid valve device 72. The movable element 36 is moved forward and backward by the control of the solenoid valve device 72. Air is also supplied to the air passage 60 as the movable element 36 moves backward.

[0021] The movable element moving device 41 includes a movable element position sensor 120. The movable element position sensor 120 detects the position of the movable element 36. The solenoid valve device 72 is controlled based on the position of the movable element 36 detected by the movable element position sensor 120.

[0022] The solenoid valve devices 69 and 72 include, but are not limited to, multiple flow control valves, directional control valves, etc. For example, they may include multiple on-off valves.

[0023] The measuring device 10 includes an air supply device 43. The air supply device 43 supplies air to the opposing surface 36f of the movable element 36 and includes the aforementioned air cylinders 64, 70, air passage 60, ionizer 62, etc. The air passage 60 is provided on a member on the stator side {for example, the upper part of the stator 34 or the part of the stator holder 55 above the stator 34 or the main body 30}. The air supplied to the air passage 60 is ejected from the air outlet 60a toward the opposing surface 36f of the movable element 36. An ionizer 62 is also provided in the part of the air passage 60 downstream of the air cylinders 64, 70. The ionizer 62 generates corona discharge to ionize the air, and ionized air can be supplied to the opposing surface 36f. Note that the ionizer 62 is not essential.

[0024] Furthermore, the holding base moving device 40 and the movable element moving device 41 may include an electric motor as a drive source. Also, the air supply device 43 is not essential.

[0025] Furthermore, as shown in Figure 1, a pair of guide rods 74 and 75 extending in the y-direction are provided between the main body 30 or the stator holder 55 and the movable element holder 56, and a pair of guide rods 76 and 77 extending in the y-direction are provided between the support base 32 and the movable element holder 56. These guide rods 74, 75, 76, and 77 allow the stator 34 and the movable element 36 to move relative to each other (approach and move apart) in the y-direction, and also allow the support base 32 and the movable element 36 to move relative to each other in the y-direction.

[0026] Furthermore, a stopper 82 is provided on the stator side of the movable element holder 56, and a stopper 80 is provided on the part of the main body 30 that holds the stator holder 55. The stopper 82 defines the limit of proximity between the movable element holder 56 and the holding base 32 (mounting part holder 46), and the stopper 80 defines the limit of proximity between the stator 34 (main body 30) and the holding base 32 (mounting part holder 46).

[0027] In this embodiment, the guide rods 74-77 are shared between the holding base moving device 40 and the movable element moving device 41. The stoppers 80 and 82 can be considered as components of at least one of the holding base moving device 40 and the movable element moving device 41.

[0028] The measurement value acquisition unit 42 measures the electrical characteristics of a component s held by a pair of measuring probes 37 and acquires the measured values. The measurement value acquisition unit 42 is provided between the pair of measuring probes 37 and includes an AC signal generation unit, a current measurement unit, a voltage measurement unit, etc. (not shown). In the measurement value acquisition unit 42, the AC current flowing through the component s is measured, or the voltage difference generated in the component s is measured, thereby acquiring the measured values ​​of the electrical characteristics. In this embodiment, the measurement value acquisition unit 42 measures L (inductance), C (capacitance), R (resistance), Z (impedance), etc., as electrical characteristics of the component s and acquires the measured values.

[0029] In this embodiment, the measurement mechanism 90 is comprised of a holding base 32, a pair of measuring probes 37, a holding base moving device 40, a movable probe moving device 41, a measurement value acquisition unit 42, and the like. The measurement mechanism 90 operates according to set measurement conditions to measure the electrical characteristics of the component s and acquire the measurement value.

[0030] The mounting machine includes a control device 100. As shown in Figure 5, the control device 100 includes a computer-based controller 102 and a plurality of drive circuits 104. The controller 102 includes an execution unit 110, a storage unit 112, an input / output unit 114, etc. The input / output unit 114 is connected to a substrate transport and holding device 4, a component supply device 6, a head moving device 8, etc., via the drive circuits 104, as well as a measuring device 10, a display 116, etc. The storage unit 112 stores a plurality of programs, work plan information, etc. The plurality of programs include a program for mounting components s supplied by the component supply device 6 onto a circuit board P held by the substrate transport and holding device 4, and a program for controlling the measuring mechanism 90, etc. The work plan information is information related to mounting components s onto the circuit board P, and also includes the nominal values ​​of the electrical characteristics of the components s to be mounted on the circuit board P. In addition, the program for controlling the measuring mechanism 90, etc. includes an electrical characteristic acquisition program, etc., as shown in the flowchart in Figure 6.

[0031] In the measuring device 10 of the mounting machine configured as described above, the electrical characteristics of each component s are measured multiple times. The multiple measurement values ​​obtained from these multiple measurements are then statistically processed to obtain an electrical characteristic value, which is the value of the electrical characteristics of component s. In the measuring device 10, the measuring mechanism 90 repeatedly measures the electrical characteristics of the component and obtains measurement values ​​according to the number of measurements specified as the measurement conditions. The average value of the multiple measurement values ​​can then be obtained as the electrical characteristic value of component s.

[0032] When obtaining an average value, a larger number of measurements (number of measurements) allows for more accurate acquisition of electrical characteristic values ​​than a smaller number of measurements. However, increasing the number of measurements increases the time required for measurement, reducing work efficiency.

[0033] On the other hand, regarding the electrical characteristics of a component (e.g., impedance, capacitance, etc.), the variation in measured values ​​is greater when the value is small than when it is large. Therefore, for components with small electrical characteristics, it is desirable to obtain electrical characteristic values ​​by taking many measurements. In addition, in the mounting machine, the component s to be the next object to have its electrical characteristics measured is predetermined, and information regarding the nominal value of the electrical characteristics of component s (a value determined by the manufacturer of component s) (for example, part of the work plan information) is stored in the storage unit 112 in advance.

[0034] Therefore, in this embodiment, the number of measurements is increased for components s with small nominal electrical characteristics, and decreased for components s with large nominal electrical characteristics. As a result, the electrical characteristics of components s with small nominal characteristics can be acquired with high accuracy, and the speed of acquiring electrical characteristics of components s with large nominal characteristics can be increased.

[0035] In this measuring device 10, the number of measurements is set based on the nominal value of the electrical characteristics. Hereinafter, the set number of measurements may be referred to as the set number of measurements. In this embodiment, the number of measurements can be set in advance in four stages. For example, if the nominal value Rs of the electrical characteristics is greater than the first threshold Rth1 (Rs > Rth1), the set number of measurements is set to N1. If the nominal value Rs is less than or equal to the first threshold and greater than the second threshold Rth2 which is smaller than the first threshold (Rth2 < Rs ≤ Rth1), the number of measurements is set to N2 (N2 > N1), which is greater than N1. The set number of measurements is set to N2. If the nominal value Rs is less than or equal to the second threshold and greater than the third threshold which is smaller than the second threshold (Rth3 < Rs ≤ Rth2), the set number of measurements is set to N3 (N3 > N2), which is greater than N2. When the nominal value Rs is below the third threshold (Rs ≤ Rth3), the set number of measurements is considered to be N4 (N4 > N3), which is greater than N3.

[0036] Furthermore, these first threshold Rth1, second threshold Rth2, and third threshold Rth3 can be pre-set based on the variation in past measured electrical characteristics of each of multiple objects. An example of this is shown in Figure 8. As shown in Figure 8, for example, consider a coordinate system of the nominal value of a component s and the variation (variance) of the measured values. Then, the variation is determined for each of several different types of components (including components with different nominal values), and the points determined by the nominal value and the variation are plotted on the coordinate system. From Figure 8, it is clear that when the nominal value is small, the variation tends to be larger than when it is large. Based on this relationship between the nominal value and the variation, the first threshold Rth1, second threshold Rth2, and third threshold Rth3 can be set for the nominal value such that when the variation is large, the number of set measurements is increased compared to when the variation is small.

[0037] The control device 100 executes the electrical characteristic acquisition program, shown in the flowchart of Figure 6, at predetermined set time intervals. In this embodiment, the control device 100 uses the outputs of the holding base position sensor 122 and the movable element position sensor 120, as well as the measurement time by a timer (not shown), to control the solenoid valve devices 69 and 72, causing the holding base 32 and the movable element 36 to move forward and backward, respectively.

[0038] The measuring device 10 is always in its initial state. The movable element 36 is in the retracted end position, and the holding base 32 is in the forward end position, i.e., in contact with the stopper 80. In this state, the component placement section 44 is grounded by internal conductivity or the like. The movable element 36 is not above the V-groove 44c of the holding base 32, and the component s can be placed on it.

[0039] In step 1 (hereinafter abbreviated as S1; the same applies to the other steps), the control device 100 determines whether or not a command has been issued to acquire the electrical characteristic value of component s. If the determination in S1 is YES, the control device 100 determines and sets the number of measurements for component s in S2. Subsequently, the control device 100 repeats S3-12 for the set number of measurements. By measuring the electrical characteristics of component s for the set number of measurements, the control device 100 acquires a number of measurement values ​​corresponding to the set number of measurements.

[0040] In S3, the control device 100 moves the head 16. For example, the component s supplied by a predetermined tape feeder 14 is picked up by the suction nozzle 18 and placed on the V-groove 44c of the holding table 32. When the control device 100 lowers the suction nozzle 18 and releases the component s, it can be seen that the component s has been placed on the V-groove 44c.

[0041] After that, when the control device 100 raises the suction nozzle 18 to the upper end, in S4, the control device 100 advances the mover 36 by controlling the solenoid valve device 72. The control device 100 advances the opposing surface 36f at the tip of the mover 36 along the V-groove 44c of the component placement part 44. The control device 100 clamps the component s between the opposing surface 36f and the opposing surface 34f of the stator 34.

[0042] In S5, the control device 100 controls the solenoid valve device 69 to retract the holding table 32 until it abuts against the stopper 82. By separating the holding table 32 from the component s, it is possible to reduce the measurement error of the electrical characteristics caused by the component placement part 44 being located near the component s. Also, by positioning the holding table 32 behind the tip part 36a of the mover 36, the holding table 32 can be well separated from the mover 36.

[0043] In S6, the control device 100 waits for the elapse of the static elimination time, which is the set time, since the component s was placed on the V-groove 44c. The charge charged on the component s is statically eliminated through the holding table 32 and is discharged into the air after the holding table 32 is retracted. The time required for static elimination of the component s is determined by the characteristics and size of the component s, etc., and is predetermined. When the static elimination time has elapsed and the determination becomes YES, in S7, the control device 100 measures the electrical characteristics and stores the measured value Rx.

[0044] In S8, the control device 100 controls the solenoid valve device 72 to retract the mover 36. In S9, by controlling the solenoid valve device 69, the holding base 32 is retracted until it abuts against the stopper 82. The holding base 32 is located behind the opposing surface 36f of the mover 36 and does not exist below between the pair of opposing surfaces 34f and 36f. The dropped part s is accommodated in the recovery container 26 through the opening 30a and the recovery passage 28. Also, when the mover 36 retracts, the control device 100 ejects air from the air ejection port 60a of the air passage 60 toward the opposing surface 36f of the mover 36. Further, the space between the pair of opposing surfaces 34f and 36f is covered from the x direction by the cover 50. As a result, the part s can be dropped well from the opposing surface 36f, and scattering of the part s can be prevented.

[0045] In S10, the control device 100 controls the solenoid valve device 69 to advance the holding base 32 and return it to the initial state. Also, the control device 100 supplies air to the opposing surface 36f of the mover 36 as the holding base 32 advances. Thereby, the static elimination of the opposing surface 36f of the mover 36 can be achieved well.

[0046] In S11, the control device 100 increases the count value n of the counter that counts the number of measurements by 1. In S12, it is determined whether the count value n has reached the set number of measurements N. If the determination is NO, the control device 100 returns to S3 and executes S3 - 11 to place the part s on the holding base 32, acquire the measured value Rx, and store it. When the control device 100 repeatedly executes S3 - 11 the set number of measurements N times, it determines YES in S12. In S13, the control device 100 acquires the average value R of the measured values Rx. In S14, the average value R is acquired as the electrical characteristic value. In S13 or 14, the control device 100 also performs end processing such as initialization of the count value n.

[0047] The control device 100 executes S2 according to the measurement count setting routine shown in the flowchart of Figure 7. In S21, the control device 100 obtains the nominal value Rs of the electrical characteristics of the object, and in S22-24, it determines whether the nominal value Rs is greater than the first threshold, greater than the second threshold, or greater than the third threshold. If the nominal value Rs is greater than the first threshold Rth1, the control device 100 sets the determination in S22 to YES, and in S25, sets the set measurement count N to count N1.

[0048] If the nominal value Rs is less than or equal to the first threshold Rth1 and greater than the second threshold Rth2, the control device 100 determines NO in S22 and YES in S23, and sets the set number of measurements N to N2 in S26.

[0049] If the nominal value Rs is less than or equal to the second threshold Rth2 and greater than the third threshold Rth3, the control device 100 determines NO in S22 and S23, YES in S24, and sets the set number of measurements N to N3 in S27. If the nominal value Rs is less than or equal to the third threshold, the control device 100 determines NO in S22, S23 and S24, and sets the set number of measurements N to N4 in S28. N←Nk: k=1,2,3,4

[0050] In this embodiment, the number of measurements is automatically set based on the nominal value of the electrical characteristics of the component s whose electrical characteristics are to be acquired next. Therefore, if the nominal value of the electrical characteristics is small, the accuracy of the electrical characteristics can be improved by increasing the number of measurements. Conversely, if the nominal value of the electrical characteristics is large, the acquisition time for the electrical characteristics can be shortened by decreasing the number of measurements, thereby increasing the acquisition speed. In this way, by setting the number of measurements based on the electrical characteristics, the acquisition time for acquiring the electrical characteristics of components used in the mounting machine can be set to an appropriate length, thereby improving the acquisition accuracy.

[0051] Furthermore, compared to cases where the number of measurements is input and set by the operator, human error can be reduced, and the measurement conditions can be set more accurately. In addition, since the measuring device 10 is installed in the mounting machine, work plan information including nominal values ​​is stored in the storage unit 112 in advance. Therefore, the measurement conditions of the measuring device 10 can be set using the work plan information stored in the storage unit 112. There is no need to store nominal values ​​for measurement with the measuring device 10.

[0052] As described above, the measurement condition setting unit is configured by the part of the control device 100 that stores S2, the part that executes it, etc., and the measurement value processing unit is configured by the part of the control device 100 that stores S13, the part that executes it, etc. The individual information storage unit and the work plan information storage unit are configured by the storage unit 112, etc. Furthermore, the part of the control device 100 that controls the measurement mechanism 90, such as the part that stores the electrical characteristic acquisition program and the part that executes it, can be considered a component of the measuring device 10.

[0053] It can also be considered that the electrical characteristic acquisition device is composed of the measuring device 10 and the part of the control device 100 that acquires the electrical characteristic values ​​in S13 and S14. On the other hand, the part that acquires the electrical characteristic values ​​can also be considered a component of the measuring device 10. Furthermore, the measuring device 10 may be provided with a dedicated control unit that controls the measuring mechanism 90.

[0054] In the above embodiment, the case in which the measuring device is installed on the mounting machine was described, but the measuring device can be used independently instead of being installed on the mounting machine.

[0055] Furthermore, although the above embodiment described the case where inductance and capacitance are obtained as electrical characteristics, it can also be applied to the acquisition of other electrical characteristics.

[0056] In addition to the embodiments described above, this disclosure can be implemented in various modified and improved forms based on the knowledge of those skilled in the art.

[0057] 10: Measuring device 32: Holding base 34: Stator 36: Movable element 42: Measurement value acquisition unit 44: Parts placement unit 100: Control device 112: Storage unit Requestable Disclosures

[0058] (1) A measuring device including a measuring mechanism for measuring the electrical characteristics of an object according to set measurement conditions, and a measurement condition setting unit for automatically setting the measurement conditions based on information regarding the electrical characteristics of the object itself.

[0059] Measurement conditions include measurement speed and number of measurements. Measurement speed includes static discharge time and waiting time. Waiting time can be, for example, the time between the completion of the first measurement of the electrical characteristics of the same type of component (S10) and the start of the second measurement (S3). If the waiting time is long, static discharge of the component mounting section 44 can be performed effectively, and the measurement accuracy of the electrical characteristics of the component can be improved.

[0060] Information regarding the electrical characteristics of the object itself includes nominal values, previously acquired electrical characteristic values, etc.

[0061] (2) The measuring device according to item (1), wherein the measurement condition is the number of measurements of the electrical characteristics of the object, and the measurement condition setting unit includes an individual information storage unit that stores a nominal value of the electrical characteristics which is information relating to the electrical characteristics of the object itself, and when the nominal value stored in the individual information storage unit is less than or equal to a threshold, the number of measurements is set to be greater than when it is greater than the threshold.

[0062] (3) The measuring device according to item (2), wherein the measuring device includes a measurement value processing unit that statistically processes one or more measurement values ​​of the object obtained by measuring the electrical characteristics of the object for a number of measurements set by the measurement condition setting unit, thereby obtaining a value of the electrical characteristics of the object.

[0063] The values ​​obtained through statistical processing can include the mean, median, etc.

[0064] (4) The measuring device according to item (2) or (3), wherein the threshold value is set based on a variation-related value which is a value representing the degree of variation in past measured values ​​of the electrical characteristics of each of the multiple objects.

[0065] Values ​​related to variability can include variance (variance), standard deviation, the difference between the maximum and minimum values, the difference between these values ​​divided by the nominal value, and the difference between these values ​​divided by the mean.

[0066] (5) An electrical characteristic acquisition device for acquiring the electrical characteristics of an object, comprising: a measuring mechanism capable of measuring the electrical characteristics of the object and acquiring measurement values; a measurement value processing unit that acquires the value of the electrical characteristics of the object based on one or more measurement values ​​acquired by the measuring mechanism; and an acquisition speed setting unit that automatically sets the acquisition speed of the value of the electrical characteristics based on information about the electrical characteristics of the object itself that is stored in advance.

[0067] In the above embodiment, the measurement value processing unit is configured by a part that stores S13, a part that executes it, and so on.

[0068] (6) The electrical characteristics acquisition device according to item (5), wherein the acquisition speed setting unit includes an individual information storage unit that stores a nominal value of the electrical characteristics of the object as information relating to the electrical characteristics of the object itself, and when the nominal value stored in the individual information storage unit is less than a threshold value, the acquisition speed is set to a slower speed than when it is greater than or equal to the threshold value.

[0069] (7) A mounting machine for mounting components supplied by a component supply device onto a circuit board, comprising: a measuring mechanism for measuring the electrical characteristics of a component to be mounted on the circuit board according to set measurement conditions and acquiring measurement values; a work plan information storage unit for storing work plan information including nominal values ​​of the electrical characteristics of the component; and a measurement condition setting unit for setting the measurement conditions based on the nominal values ​​of the electrical characteristics of the component stored in the work plan information storage unit.

[0070] The mounting device described in this section may adopt any of the technical features described in (1) through (6).

Claims

1. A measuring device including a measuring mechanism for measuring the electrical characteristics of an object according to set measurement conditions, and a measurement condition setting unit for automatically setting the measurement conditions based on information regarding the electrical characteristics of the object itself.

2. The measuring device according to claim 1, wherein the measurement condition is the number of measurements of the electrical characteristics of the object, the measurement condition setting unit includes an individual information storage unit that stores a nominal value of the electrical characteristics which is information relating to the electrical characteristics of the object itself, and the number of measurements is set to be greater than the number of measurements when the nominal value stored in the individual information storage unit is less than or equal to a threshold value.

3. The measuring device according to claim 2, which includes a measurement value processing unit in the measuring mechanism that obtains a value of the electrical characteristics of an object by statistically processing one or more measurement values ​​of the object obtained by measuring the electrical characteristics of the object for a number of measurements set by the measurement condition setting unit.

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