JP2019029270A - Route selection system - Google Patents

Abstract

To avoid misconnection of an electric circuit device and a specific electronic component or an element.SOLUTION: A route selection system includes a selection unit having a first rectification part for feeding a current in a first direction, and a second rectification part for feeding a current in a second direction opposite to the first direction, where both ends of the first rectification part and both ends of the second rectification part are connected in parallel so that the rectification direction is reversed, a selection unit for selecting an object to be connected with a specific electric circuit device, a current generation part for generating a current to be fed to the first or second rectification part, and a control section for controlling the current generation part. The first or second rectification parts have an open/close control part of at least one relay, respectively, and change over connection of the electric circuit device and the object, according to the open/close state of the relay.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a path selection system for selecting a specific electronic component or element connected to an electric circuit device.

  Various types of electrical characteristic inspection systems for measuring electrical characteristics of chip-type electronic components (hereinafter referred to as workpieces) such as resistors, capacitors, and coils are known (for example, Patent Document 1). Etc.). In such a work electrical property inspection system, a probe is brought into contact with a work electrode, and the probe is connected to a measuring instrument. At this time, in order to improve the inspection efficiency, probes corresponding to the electrodes of the plurality of workpieces are brought into contact with each other in advance. For this reason, a path selection system is selected in which only those that contact the workpiece to be inspected are selected from these probes and connected to the measuring instrument.

  FIG. 6 is a diagram showing a configuration of a conventional route selection system 100. As shown in FIG. 6, the conventional route selection system 100 includes a selection unit 101, a current generation unit 102, a display unit 105, and a control unit 106. FIG. 6 further illustrates a measuring instrument 103 provided outside the route selection system 100, and a work W1 and a work W2 to be inspected. The selection unit 101 is a unit that selects specific workpieces W1 and W2 connected to the measuring instrument 103, and includes eight electromagnetic relays RL11, RL12, RL13, RL14, RL21, RL22, RL23, and RL24.

  The electromagnetic relay R11 includes an opening / closing control unit having an electromagnetic coil Rc11 and a path opening / closing unit having a mechanical contact Rs11. The electromagnetic coil Rc11 generates an electromagnetic force corresponding to the applied current. When no current is applied to the electromagnetic coil Rc11, the mechanical contact Rs11 is in an open state (OFF) by, for example, mechanical force. On the other hand, when a current is applied to the electromagnetic coil Rc11, the mechanical contact Rs11 is brought into a closed state (ON) by an electromagnetic force generated according to energization. Then, when the application of current is stopped, it returns to the open state (OFF) again by mechanical force. The same applies to the other electromagnetic relays RL12, RL13, RL14, RL21, RL22, RL23, and RL24. Here, in order to simplify the description, the description order of the electromagnetic relays is hereinafter defined as RL11, RL12, RL13, RL14, RL21, RL22, RL23, and RL24. For example, when RL11, RL12, RL13, and RL14 are expressed together, they are described as “RL11 to RL14”. Moreover, when expressing all the electromagnetic relays except RL11 collectively, it describes as "RL12-RL24." The same applies to the electromagnetic coils Rc11, Rc12, Rc13, Rc14, Rc21, Rc22, Rc23, Rc24 and the mechanical contacts Rs11, Rs12, Rs13, Rs14, Rs21, Rs22, Rs23, Rs24.

  The current generator 102 has a function of applying a current to the electromagnetic coils Rc11 to Rc24, the light emitting diode D1, and the light emitting diode D2, and includes ten drivers DRV1 to DRV10. A constant voltage V + is connected to the drivers DRV1 to DRV10. The drivers DRV1 to DRV10 are individually controlled by control inputs DC1 to DC10, respectively. As a result, the outputs DS1 to DS10 of the drivers DRV1 to DRV10 are set to a constant voltage V + or set to a high impedance state (HZ), that is, a state where they are not electrically connected anywhere. The relationship between the logic of the control inputs DC1 to DC10 and the setting of the outputs DS1 to DS10 will be described later.

  The current generator 102 includes a control input setting unit 102a. The control input setting unit 102a sets the control inputs DC1 to DC10 individually. Here, when the driver DRV1 is connected to one end of the electromagnetic coil Rc11 and the output DS1 is set to the constant voltage V +, the constant voltage V + that is the output DS1 of the driver DRV1 is applied to one end of the electromagnetic coil Rc11. Similarly, the driver DRV2 is one end of the electromagnetic coil Rc13, the driver DRV3 is one end of the electromagnetic coil Rc12, the driver DRV4 is one end of the electromagnetic coil Rc14, the driver DRV5 is one end of the electromagnetic coil Rc21, and the driver DRV6 is one end of the electromagnetic coil Rc23. The driver DRV7 is connected to one end of the electromagnetic coil Rc22, and the driver DRV8 is connected to one end of the electromagnetic coil Rc24. Thus, similarly to the output DS1, when each of the outputs DS2 to DS8 is set to the constant voltage V +, the constant voltage V + as the output DS2 is applied to one end of the electromagnetic coil Rc13, and the constant voltage V + as the output DS3 is set to the electromagnetic coil. At one end of Rc12, a constant voltage V + as output DS4 is at one end of electromagnetic coil Rc14, a constant voltage V + as output DS5 is at one end of electromagnetic coil Rc21, and a constant voltage V + as output DS6 is at one end of electromagnetic coil Rc23. The constant voltage V + as the output DS7 is applied to one end of the electromagnetic coil Rc22, and the constant voltage V + as the output DS8 is applied to one end of the electromagnetic coil Rc24. The driver DRV9 and the driver DRV10 will be described later.

  A constant voltage Vd is applied to the other ends of the electromagnetic coils Rc11 to Rc24. Here, the relationship between the constant voltage V + and the constant voltage Vd connected to the drivers DRV1 to DRV8 in the current generator 102 is V +> Vd. As can be seen, current corresponding to the voltage difference flows through the corresponding electromagnetic coils Rc11 to Rc24 in response to the application of the outputs DS1 to DS8. On the other hand, when each of the outputs DS1 to DS8 is set to the high impedance state (HZ), no current flows through the corresponding electromagnetic coils Rc11 to Rc24.

  The measuring instrument 103 as an electric circuit device includes a constant current source 103a and a DC voltmeter 103b. Further, on the surface of the measuring instrument 103, a current output terminal IH that outputs current generated by the constant current source 103a, a current input terminal IL that inputs current to the constant current source 103a, and a voltage input on the high potential side of the DC voltmeter 103b. A terminal VH and a voltage input terminal VL on the low potential side are provided.

  For example, the electrodes W1a and W1b and the electrodes W2a and W2b are formed at both ends of the two workpieces W1 and W2 to be subjected to the electrical characteristic inspection. Probes 104a1 and 104c1 are in contact with the electrode W1a, and probes 104b1 and 104d1 are in contact with the electrode W1b. Similarly, probes 104a2 and 104c2 are in contact with the electrode W2a, and probes 104b2 and 104d2 are in contact with the electrode W2b. Hereinafter, when all the probes in contact with the electrodes W1a and W1b of the workpiece W1 are expressed together, they are described as “104a1 to 104d1”, and all the probes in contact with the electrodes W2a and W2b of the workpiece W2 are expressed together. In this case, “104a2 to 104d2” is described.

  As will be described later, all the probes that come into contact with the electrodes W1a and W1b of the workpiece W1 by the operation of the selection unit 101 are connected to the current output terminal IH, the current input terminal IL, and the voltage input terminal VH on the high potential side. Are simultaneously connected to the low potential side voltage input terminal VL. Hereinafter, for the sake of simplicity, this connection is referred to as “connection between the workpiece W1 and the measuring instrument 103”. Similarly, by the action of the selection unit 101, all the probes that come into contact with the electrodes W2a and W2b of the workpiece W2 are the current output terminal IH, current input terminal IL, voltage input terminal VH on the high potential side, and low potential side. Are simultaneously connected to the voltage input terminal VL. Hereinafter, for the sake of simplicity, this connection is referred to as “connection between the workpiece W2 and the measuring instrument 103”.

  The probe 104a1 is connected to one end of the mechanical contact Rs11, and the probe 104c1 is connected to one end of the mechanical contact Rs13. The probe 104b1 is connected to one end of the mechanical contact Rs12, and the probe 104d1 is connected to one end of the mechanical contact Rs14. Similarly, the probe 104a2 is connected to one end of the mechanical contact Rs21, and the probe 104c2 is connected to one end of the mechanical contact Rs23. The probe 104b2 is connected to one end of the mechanical contact Rs22, and the probe 104d2 is connected to one end of the mechanical contact Rs24. In this way, one end of the eight mechanical contacts Rs11 to Rs24 and one end of the two workpieces are connected by individually connecting the one end of the eight mechanical contacts Rs11 to Rs24 and the probes 104a1 to 104d1 and the probes 104a2 to 104d2. And the 1st connection line which connects an other end individually is formed.

  In the measuring instrument 103, the current output terminal IH is connected to the other ends of the mechanical contacts Rs13 and Rs23. The current input terminal IL is connected to the other ends of the mechanical contacts Rs14 and Rs24. On the other hand, the high potential side voltage input terminal VH is connected to the other ends of the mechanical contacts Rs11 and Rs21. The low potential side voltage input terminal VL is connected to the other ends of the mechanical contacts Rs12 and Rs22. As described above, one input or output of the measuring instrument 103 is simultaneously connected to the other ends of the plurality of mechanical contacts among the eight mechanical contacts Rs11 to Rs24 to form a second connection line.

  The display unit 105 is provided in the route selection system 100 and includes two light emitting diodes (LEDs) D1 and D2. The anode of the light emitting diode D <b> 1 is connected to the driver DRV <b> 10 of the current generator 102. Thereby, when the output DS10 of the driver DRV10 is set to the constant voltage V +, the constant voltage V + is applied to the anode of the light emitting diode D1. Similarly, the anode of the light emitting diode D2 is connected to the driver DRV9 of the current generator 102, and when the output DS9 of the driver DRV9 is set to the constant voltage V +, the constant voltage V + is applied to the anode of the light emitting diode D2.

  The driver DRV10 changes the output DS10 by individual control by the control signal DC10. Similarly, the driver DRV9 changes the output DS9 by individual control by the control signal DC9. The relationship between the control signals DC10 and DC9 and the outputs DS10 and DS9 will be described later. Further, the same constant voltage Vd as that applied to the other ends of the coils Rc11 to Rc24 is applied to the cathodes of the light emitting diodes D1 and D2.

  The control unit 106 is provided in the route selection system 100, and controls the control input setting unit 102a by software.

  Control of the route selection system 100 of the inspection apparatus according to the conventional technology as described above will be described with reference to FIGS. 7, 8A, 8B, and 8C. FIG. 7 is a diagram showing the current generation unit 102, the electromagnetic coils Rc11 to Rc24, and the display unit 105 extracted from the route selection system 100 in FIG. FIG. 8A is a diagram showing the relationship between the control inputs DC1 to DC10 of the drivers DRV1 to DRV10 and the outputs DS1 to DS10 of the drivers DRV1 to DRV10 in FIG. 6 as a truth table. FIG. 8B is a truth table showing the relationship among the states of the control inputs DC1 to DC10, the mechanical contacts Rs11 to Rs24 of the electromagnetic relays RL11 to RL24, and the light emitting diodes (LEDs) D2 and D1. FIG. 8C is a diagram showing the relationship between the control inputs DC1 to DC10 of the drivers DRV1 to DRV10, the mechanical contacts Rs11 to Rs24 of the electromagnetic relays RL11 to RL24, and the connections between the workpieces W1 and W2 and the measuring instrument 103 as a truth table. .

  Here, referring to FIGS. 6 and 7, based on FIGS. 8A, 8B and 8C, the control commands [0] to [10], the control inputs DC1 to DC10, the driver outputs DS1 to DS10, and the mechanical contact Rs11 of the electromagnetic relay. The relationship with ~ Rs24 will be described. As shown in FIG. 8A, the leftmost column of the truth table is control instructions [0] to [10]. The control commands [0] to [10] are transmitted to the control input setting unit 102a when the control unit 106 controls the control input setting unit 102a of the current generation unit 102 by software. The control commands [0] to [10] are identified by numbers assigned individually, and numbers 0 to 10 are assigned corresponding to the control commands indicated by each column. Next, the second to eleventh columns from the left end indicate the settings of the control inputs DC1 to DC10. The control inputs DC1 to DC10 are logic inputs, and take two values of H (high) level or L (low) level. The H (high) level is described as “H”, and the L (low) level is described as “L”. The same applies to the following description. Here, when i is 1 to 10, the output DSi is set to the constant voltage V + and the control input DCi is set to “L” when the control input DCi is set to “H” by the function of the driver DRVi. And the output DSi are set to a high impedance state (a state where the output DSi is not electrically connected anywhere).

  First, the control instruction [0] will be described. In the control command [0], all the control inputs DC1 to DC10 are “L”. This is the initial state without control. The states of the driver outputs DS1 to DS10 at this time are shown in the 12th to 21st columns. Since the control input DCi and the output DSi of the driver DRVi have the above relationship, all the outputs DS1 to DS10 are set to the high impedance state (HZ). Incidentally, as shown in FIG. 7, the outputs DS1 to DS8 are connected to one ends of the electromagnetic coils Rc11 to Rc24. The output DS9 is connected to the anode of the light emitting diode D2, and the DS10 is connected to the anode of the light emitting diode D1. Therefore, in the control command [0], one end of the electromagnetic coils Rc11 to Rc24 and the anodes of the light emitting diodes D2 and D1 are in a high impedance state. For this reason, no current is applied to the electromagnetic coils Rc11 to Rc24, and the mechanical contacts Rs11 to Rs24 corresponding to the electromagnetic coils are in an open state (OFF). Further, the light emitting diodes D2 and D1 are turned off. This is shown in the truth table in the control instruction [0] shown in FIG. 8B. In FIG. 8B, the off state is indicated by “off” and the on state is indicated by “lit” so that the on and off states of the light emitting diodes D2 and D1 can be intuitively understood by looking at the table. .

  Next, referring to FIG. 8A again, the control instruction [1] will be described. In the control command [1], the control input DC1 is “H”, and the other control inputs DC2 to DC10 are “L”. As described above, the driver outputs DS1 to DS10 when the control inputs are set are such that the output DS1 is set to the constant voltage V + and the other outputs DS2 to DS10 are set to the high impedance state (HZ). At this time, as shown in FIG. 7, since the output DS1 is set to V +, the constant voltage V + is applied to one end of the electromagnetic coil Rc11, and the constant voltage Vd is applied to the other end. Since V +> Vd as described above, a current is applied to the electromagnetic coil Rc11. The corresponding mechanical contact Rs11 is in the closed state (ON). The other mechanical contacts Rs12 to Rs24 are open (OFF), and the light emitting diodes D2 and D1 are both off. This is shown in control instruction [1] in the truth table of FIG. 8B. Hereinafter, in the same manner as the control command [1], only one of the 10 control inputs is set to “H”, and the remaining control inputs are set to “L”. Is set. In FIG. 8B, like the control command [1], in the control commands [2] to [8], only the mechanical contact corresponding to the control input set to “H” is in the closed state (ON), and the rest. These mechanical contacts are in an open state (OFF). Further, in the control commands [9] and [10], all the mechanical contacts Rs11 to Rs24 are open (OFF), and the light emitting diodes D2 and D1 are turned on in response to the control commands [9] and [10], respectively. .

  Here, in order to connect the work W1 and the measuring instrument 103 and the connection between the work W2 and the measuring instrument 103 shown in FIG. 6, it is shown which control command should be executed simultaneously from FIG. 8A. The thing is FIG. 8C. More specifically, for each of the control commands [0] to [10], the relationship between “H” and “L” of the control inputs DC1 to DC10 and “ON” and “OFF” of the mechanical contact points Rs11 to Rs24 of the relay is shown. At the same time, in the two columns at the right end, the characters “execute” are placed on the lines corresponding to the control numbers to be executed in order to connect the workpiece W1 and the measuring instrument 103 and connect the workpiece W2 and the measuring instrument 103, respectively. Show. First, in the second column from the right end, [1] to [4] and [10] are listed as control commands to be executed when the workpiece W1 and the measuring instrument 103 are connected. Among these, the mechanical contacts that are closed (ON) corresponding to the control commands [1] to [4] are Rs11, Rs13, Rs12, and Rs14, respectively. Here, when “H” and “L” are simultaneously input to the same control input by different control commands, “H” is preferentially set.

  As shown in FIG. 6 again, when these mechanical contacts are closed, the probe 104a1 is connected to the high potential side voltage input terminal VH, the probe 104c1 is connected to the current output terminal IH, and the probe 104b1 is connected to the low potential side. Is connected to the voltage input terminal VL, and the probe 104d1 is connected to the current input terminal IL. Thereby, the inspection of the electrical characteristics of the workpiece W1 is performed. Further, as shown in FIG. 8B, the light emitting diode D1 is turned on in response to the control command [10]. Thereby, the worker near the inspection device can confirm that the inspection of the workpiece W1 is visually performed. Similarly, in the rightmost column of FIG. 8C, [5] to [8] and [9] are listed as control commands executed when the workpiece W2 and the measuring instrument 103 are connected. Among these, the mechanical contacts that are closed (ON) corresponding to the control commands [5] to [8] are Rs21, Rs23, Rs22, and Rs24, respectively.

  As shown in FIG. 6 again, when these mechanical contacts are closed, the probe 104a2 is connected to the high potential side voltage input terminal VH, the probe 104c2 is connected to the current output terminal IH, and the probe 104b2 is connected to the low potential side. Is connected to the voltage input terminal VL, and the probe 104d2 is connected to the current input IL. Thereby, the inspection of the electrical characteristics of the workpiece W2 is performed.

  Further, as shown in FIG. 8B, the light emitting diode D2 is turned on in response to the control command [9]. Thereby, the worker near the inspection apparatus can confirm that the inspection of the workpiece W2 is visually performed.

JP, 2006-125965, A

  The conventional route selection system 100 as described above has the following problems. When the workpieces W1 and W2 shown in FIG. 6 are individually connected to the measuring instrument 103, as can be seen from FIG. 8C, it is necessary to simultaneously execute a total of five types of control commands. Here, execution of each control command, that is, setting the control inputs DC1 to DC10 to “H” or “L” is performed on the control input setting unit 102a of the current generating unit 102 shown in FIG. 6 as described above. The control unit 106 performs control by transmitting a control command by software. Further, wiring for connection between the outputs DS1 to DS10 of the drivers DRV1 to DRV10 and one end of the electromagnetic coils Rc11 to Rc24 and the cathodes of the light emitting diodes D1 and D2, and connection between the drivers DRV1 to DRV10 and the control unit 102a All the wirings of DC1 to DC10 to be performed are individual, and the number of wirings increases.

  As a first problem, for example, two control commands [1] and [5] are sent from the control unit 106 to the control input setting unit 102a in FIGS. Suppose that the control commands are transmitted simultaneously. At this time, the mechanical contacts Rs11 and Rs21 are simultaneously closed (ON). For this reason, as shown in FIG. 6, the probe 104a1 related to the workpiece W1 and the probe 104a2 related to the workpiece W2 are simultaneously connected to the voltage input terminal VH on the high potential side, and correct inspection cannot be performed. In addition, the worker who is near the inspection device cannot grasp the fact. Thus, when only a part of the connection is not normal, correct inspection cannot be performed. For this reason, correct determination cannot be obtained, and even if the workpiece W1 is defective, there is a possibility that it is determined as a non-defective product. And the state where a defective workpiece is judged as a non-defective product continues by continuously using it in a state where such a defect cannot be grasped. As another example, when the control commands [1] to [4] and the control command [9] shown in FIGS. 8A, 8B, and 8C are executed at the same time, as shown in FIG. And the light emitting diode D2 is lit. At this time, the workpiece W1 that is actually inspected and the workpiece W2 that is being inspected visually confirmed by the worker near the inspection device are inconsistent. Also in this case, the worker cannot grasp the fact. Therefore, the operator may judge that this inspection apparatus performs the inspection of the workpiece W2 but does not execute the inspection of the workpiece W1, and may spend a lot of time investigating a portion unrelated to the malfunction of the software. There is.

  As a second problem, even if the control commands [1] to [4] and [10] are correctly transmitted simultaneously from the control unit 106 to the control input setting unit 102a, there is no problem with the software. For example, it is assumed that the wiring connecting the output DS1 of the driver and one end of the coil RL11 shown in FIG. 6 is cut off for some reason. In this case, the mechanical contact Rs11 is not in the closed state (ON) but remains in the open state (OFF). Therefore, as shown in FIG. 6, the probe 104a1 related to the workpiece W1 is not connected to the voltage input terminal VH on the high potential side, and correct inspection cannot be performed. In this case as well, the worker who is near the inspection device cannot grasp the fact. As in the first problem described above, when only a part of the connection is not normal, correct inspection cannot be performed. For this reason, correct determination cannot be obtained, and even if the workpiece W1 is defective, there is a possibility that it is determined as a non-defective product. And the state where a defective workpiece is judged as a non-defective product continues by continuously using it in a state where such a defect cannot be grasped.

  The above problem has been described with respect to the case where two workpieces W1 and W2 are selected for connection to the measuring instrument 103 shown in FIG. However, in an actual inspection apparatus, the number of workpieces selected is even larger. In this case, the measuring instrument 103 shown in FIG. 6 is one, but it is necessary to arrange the selection unit 101, the current generator 102, the probes 104a1 to 104d1 and 104a2 to 104d2, and the display unit 105 for every two works. is there. Similarly to FIG. 6, one end of each of the mechanical contacts Rs11 to Rs14 and Rs21 to Rs24 included in the plurality of selection units 101 is individually connected to the probes 104a1 to 104d1 and 104a2 to 104d2, and the mechanical contacts Rs11 to Rs14 and Rs21 to It is necessary to connect the other end of each Rs 24 to one input or output of the measuring instrument 103 simultaneously. When such a connection is made, the number of wirings further increases. For this reason, as described above, the possibility that the wiring is cut and the operator cannot grasp it is further increased. Further, as the number of current generating units 102 increases, the number of control inputs DC1 to DC10 also increases, so that the software of the control unit 106 that transmits a control command to control the control input setting unit 102a becomes complicated. For this reason, there is a higher possibility that a defect occurs in the software and the operator cannot grasp it. As described above, the situation such as the first problem or the second problem described above is more likely to occur due to the increase in the number of wirings and the complexity of the software.

  In view of the above problems, when a plurality of electrical wirings are connected to a plurality of electronic components or a plurality of elements incorporated in one electronic component, the electrical wirings connected to the respective electronic components or elements Among them, it responds to the request to select only specific electrical wiring without error and connect it to the electrical circuit device, and to display the connection status without error, and to reduce the number of electrical wiring for connection. A routing system that can do this is desirable.

  An object of the present invention is to provide a route selection system capable of switching the connection between an electric circuit device and an object without making the electric wiring complicated without error.

In order to solve the above-described problem, according to an embodiment of the present invention, a first rectifier that flows current in a first direction and a second that flows current in a second direction opposite to the first direction. A rectifying unit, and both ends of the first rectifying unit and both ends of the second rectifying unit are connected in parallel so that the respective rectifying directions are reversed, and an object to be connected to a predetermined electric circuit device is provided. A selection unit to select, and
A current generator for generating a current to flow through the first rectifier or the second rectifier;
A control unit for controlling the current generation unit;
With
Each of the first rectification unit and the second rectification unit has at least one relay opening / closing control unit,
A route selection system is provided that switches connection between the electric circuit device and the object in accordance with an open / close state of the relay.

  The current generator has a state in which current flows in the first direction, a state in which current flows in a second direction opposite to the first direction, and a state in which current does not flow in any direction. May be.

As candidates for the selection unit to select as the object, a first object and a second object may be provided,
When the first rectifier flows current in the first direction, the electric circuit device may be connected to the first object,
When the second rectifier flows current in the second direction, the electric circuit device may be connected to the second object.

The relay may include a plurality of first relays provided in the first rectification unit and a plurality of second relays provided in the second rectification unit,
The plurality of first relays may be electrically connected or disconnected in synchronization between respective input / output paths,
The plurality of second relays may be electrically connected or disconnected in synchronization between the input / output paths.

  The current generation unit sets a current supply node to the first rectification unit and the second rectification unit to a high impedance state when no current flows through the first rectification unit and the second rectification unit. Also good.

It may comprise a plurality of the selection units sharing the electrical circuit device,
The at least one relay and the object may be provided for each selection unit in the plurality of selection units.

  The control unit may perform control for causing the current selection unit to flow current in the first direction or the second direction to a specific selection unit in the plurality of selection units. The current generator may be controlled so that no current flows through the relays of other selection units other than the specific selection unit in the selection unit.

  Each of the first rectifying unit and the second rectifying unit may include a rectifying element in addition to the relay.

The relay may be an electromagnetic relay,
The switching control unit having an electromagnetic coil, and a path switching unit having a mechanical contact may have,
Each of the first rectification unit and the second rectification unit may include a circuit in which a plurality of the electromagnetic coils and one or more rectification elements are connected in series in a predetermined order.

The path opening / closing part in the relay and the corresponding opening / closing control part may be electrically insulated,
The opening / closing control unit may have a rectifying action.

  The relay may include the open / close control unit including a first light emitting diode, and a path open / close unit including a field effect transistor whose operation is switched according to a light emitting state of the first light emitting diode. Each of the second rectification units may include a circuit in which a plurality of the first light emitting diodes are connected in series in a predetermined order.

A second light emitting diode that is connected to one end of the first rectifying unit and lights when a current flows in the first direction;
And a third light emitting diode that is connected to one end of the second rectifying unit and is lit when a current flows in the second direction.

One end of the first rectification unit may be connected to a first node, and the other end may be connected to a second node. One end of the second rectification unit may be connected to the first node, and the other end May be connected to the second node;
A first wiring path that connects the electric circuit device and the first object may be connected to the relay included in the first rectification unit, and the electric circuit device included in the relay included in the second rectification unit. And a second wiring path that connects a second object different from the first object may be connected,
The first rectification unit may bring the first wiring path into a conductive state when a current in the first direction flows between the first node and the second node.
The second rectification unit may bring the second wiring path into a conductive state when a current in the second direction flows between the first node and the second node.

The object may be a chip electronic component having at least one of a resistor, a capacitor, and a coil.

  The electrical circuit device may be a measuring instrument that inspects electrical characteristics of the object.

  According to the present invention, the connection between the electric circuit device and the object can be switched without error without complicating the electric wiring.

FIG. 1 is a diagram illustrating a configuration of a route selection system according to an embodiment. FIG. 2 is a diagram illustrating the current generation unit, the diode, the electromagnetic coil, and the display unit extracted from the route selection system in FIG. FIG. 3A is a truth table showing the relationship between the control input of the driver, the output of the driver, the direction of the current flowing through each drive group, and the current of the electromagnetic coil of the electromagnetic relay in FIG. FIG. 3B shows the relationship between the control input of the driver, the output of the driver, the direction of the current flowing through each drive group, the state of the mechanical contact of the electromagnetic relay, the light emission state of the light emitting diode, and the connection state between the workpiece and the measuring instrument in FIG. Is a diagram showing a truth table. FIG. 4 is a diagram illustrating an increase in selection units when the number of workpieces to be inspected increases. FIG. 5 is a diagram illustrating a configuration of a route selection system according to a modification of the embodiment. FIG. 6 is a diagram showing a configuration of a conventional route selection system. FIG. 7 is a diagram showing the current generation unit, the electromagnetic coil, and the display unit extracted from the route selection system in FIG. FIG. 8A is a diagram showing the relationship between the control input to the driver and the driver output in FIG. 6 as a truth table. FIG. 8B is a truth table showing the relationship between the control input of the driver, the mechanical contact of the electromagnetic relay, and the state of the light emitting diode in FIG. FIG. 8C is a diagram showing the relationship between the control input to the driver, the mechanical contact of the electromagnetic relay, and the connection between the workpiece and the measuring instrument as a truth table.

  Embodiments of the present invention will be described below with reference to the drawings. This embodiment does not limit the present invention.

(One embodiment)
FIG. 1 is a diagram illustrating a configuration of a route selection system 10 according to an embodiment. As shown in FIG. 1, a path selection system 10 according to an embodiment is a system that selects specific workpieces W1 and W2 connected to a measuring instrument 103, and includes a selection unit 1, a current generation unit 2, and a display unit. 5 and a control unit 6. In FIG. 1, components having the same functions and configurations as those in FIG. 6 are denoted by the same reference numerals, and description thereof is omitted unless necessary.

  The selection unit 1 includes a first rectifier that flows current in a first direction and a second rectifier that flows current in a second direction opposite to the first direction. That is, the first rectification unit includes diodes D11 and D12 and electromagnetic relays RL11 to RL14 connected in a predetermined order between the node n1 and the node n4. More specifically, the diode D11 and the electromagnetic relays RL11 and RL12 are connected in series between the node n1 and the node n2, and the diode D12 and the electromagnetic relays RL13 and RL14 are connected in series between the node n3 and the node n4. It is connected to the.

  On the other hand, the second rectification unit includes diodes D21 and D22 and electromagnetic relays RL21 to RL24 connected in a predetermined order between the node n1 and the node n4. More specifically, the diode D21 and the electromagnetic relays RL21 and RL22 are connected in series between the node n1 and the node n2, and the diode D22 and the electromagnetic relays RL23 and RL24 are connected in series between the node n3 and the node n4. It is connected to the.

  The first direction is, for example, a direction from the node n1 to the node n4, and the second direction is, for example, a direction from the node n4 to the node n1. The selection unit 1 selects the work W1 when current flows in the first direction through the first rectification unit, and selects the work W2 when current flows in the second direction through the second rectification unit. In other words, when the first rectifier flows current in the first direction, the measuring device 103 is connected to the workpiece W1, and when the second rectifier flows current in the second direction, the measuring device 103 is moved to the workpiece W2. Connected to.

  A first wiring path to which the probes 104a1 to 104d1 are connected is connected between the measuring instrument 103 and the workpiece W1. On the other hand, a second wiring path to which the probes 104a2 to 104d2 are connected is connected between the measuring instrument 103 and the workpiece W2.

  Here, the electromagnetic relays RL11 to RL24 have the same configuration as that of the selection unit 101 in FIG. That is, each of the electromagnetic relays RL11 to RL24 includes a path opening / closing unit having mechanical contacts Rs11 to Rs24 and an opening / closing control unit having electromagnetic coils Rc11 to Rc24. The mechanical contacts Rs11 to Rs24 conduct or block between the input / output paths of the electromagnetic relays RL11 to RL24. For example, the mechanical contact Rs11 conducts or cuts off the wiring path to which the high potential side voltage input terminal VH of the measuring instrument 103 is connected to the probe 104a1. The electromagnetic relays RL11 to RL24 control conduction or interruption of the opportunity contacts Rs11 to Rs24.

  The electromagnetic coils Rc11 to Rc24 control conduction or interruption of the mechanical contacts Rs11 to Rs24. As can be seen from these, the selection unit 1 selects the first wiring path that connects the measuring instrument 103 and the workpiece W1 when the current in the first direction flows between the node n1 and the node n4, and makes the conduction, When a current in the second direction flows between the node n1 and the node n4, the second wiring path that connects the measuring instrument 103 and the work W2 is selected and made conductive. In addition, when no current flows between the node n1 and the node n4, the first wiring path and the second wiring path are in a cut-off state.

  The electromagnetic coils Rc11 to Rc24 do not flow current in the second direction to the second rectification unit and flow current to the second rectification unit in the second direction when current flows in the first direction to the first rectification unit. When flowing, the conduction or blocking of the corresponding mechanical contacts Rs11 to Rs24 is controlled so that no current flows through the first rectifying unit in the first direction.

  The current generator 2 generates a current that flows through the first rectifier or the second rectifier. That is, the current generation unit 2 has a function of applying a current to the electromagnetic coils Rc11 to Rc24, and includes a control input setting unit 2a and a driver DRV0.

  The control input setting unit 2a individually sets the control inputs DC01 and DC02 of the driver DRV0. Constant voltages V + and V− are connected to the driver DRV0. The driver DRV0 is controlled by the control inputs DC01 and DC02, and the output DS0 is set to the constant voltage V +, the constant voltage V−, or the high impedance state (HZ), that is, anywhere electrically. Set to not connected. The relationship between the logic of the control inputs DC01 and DC02 and the setting of the output DS0 will be described later.

  Further, the measuring instrument 103 which is an example of the electric circuit device, the works W1 and W2 which are examples of the object, the probes 104a1 to 104d1, and the probes 104a2 to 104d2 have the same configuration as that in FIG. The display unit 5 has a function equivalent to that of the display unit 105 in FIG. 6, but the wiring of the light emitting diodes D1 and D2 therein is different from that in FIG. That is, the selection unit 1 in FIG. 1 and the selection unit 101 in FIG. 6 differ in the connection method of the electromagnetic coils Rc11 to Rc24 and the light emitting diodes D1 and D2.

  Below, the connection method of electromagnetic coil Rc11-Rc24 and light emitting diode D1, D2 is demonstrated in detail. The driver DRV0 is connected to the anode of the diode D11 and the cathode of the diode D21 arranged in the selection unit 1. Thus, when the output DS0 is set to the constant voltage V +, the constant voltage V + is applied to the anode of the diode D11 and the cathode of the diode D21. Similarly, when the output DS0 is set to the constant voltage V−, the constant voltage V− is applied to the anode of the diode D11 and the cathode of the diode D21. On the other hand, when the output DS0 is set to the high impedance state (HZ), the high impedance state (HZ) is established between the driver DRV0 and the anode of the diode D11 and the cathode of the diode D21.

  The cathode of the diode D11 is connected to one end of the electromagnetic coil Rc11, and the other end of the electromagnetic coil Rc11 is connected to one end of the electromagnetic coil Rc12. On the other hand, the anode of the diode D21 is connected to one end of the electromagnetic coil Rc21, and the other end of the electromagnetic coil Rc21 is connected to one end of the electromagnetic coil Rc22. The other end of the electromagnetic coil Rc12 and the other end of the electromagnetic coil Rc22 are both connected to the anode of the diode D12 and the cathode of the diode D22 arranged in the selection unit 1.

  The cathode of the diode D12 is connected to one end of the electromagnetic coil Rc13, and the other end of the electromagnetic coil Rc13 is connected to one end of the electromagnetic coil Rc14. On the other hand, the anode of the diode D22 is connected to one end of the electromagnetic coil Rc23, and the other end of the electromagnetic coil Rc23 is connected to one end of the electromagnetic coil Rc24. The other end of the electromagnetic coil Rc14 and the other end of the electromagnetic coil Rc24 are both connected to the anode of the light emitting diode D1 and the cathode of the light emitting diode D2 disposed in the display unit 5. The cathode of the light emitting diode D1 and the anode of the light emitting diode D2 are both connected to the constant voltage Vd. Here, the relationship between the constant voltages V + and V− connected to the driver DRV0 and the constant voltage Vd in the current generator 2 is V +> Vd> V−.

  FIG. 2 is a diagram showing the current generation unit 2, the diodes D11, D12, D21, D22, the electromagnetic coils Rc11 to Rc24, and the display unit 5 extracted from the path selection system 10 in FIG. As shown in FIG. 2, a diode D11, electromagnetic coils Rc11 and Rc12, a diode D12, electromagnetic coils Rc13 and Rc14, and a light emitting diode D1 are connected in series to the driver DRV0 in this order. That is, as described above, the diode D11 and the electromagnetic coils Rc11 and Rc12 are connected in series between the node n1 and the node n2, and the diode D12, the electromagnetic coils Rc13 and Rc14 are connected between the node n3 and the node n4. The anode of the light emitting diode D1 is connected to the node n5 in series. The diodes D11 and D12 and the light emitting diode D1 have a rectifying action such that a forward current flows in the order of connection. This forward current is shown as a first direction current I + in FIG. Hereinafter, a circuit in which a diode and an electromagnetic coil are connected in series to have a rectifying action in which the first direction current I + flows is referred to as a first drive group DG11, DG12. A circuit in which the first drive groups DG11 and DG12 are connected in series is the first rectifier 7.

  As shown in FIG. 2, the first drive group DG11 is a circuit in which a diode D11, electromagnetic coils Rc11, and Rc12 are connected in series. Similarly, the first drive group DG12 is a circuit in which a diode D12 and electromagnetic coils Rc13 and Rc14 are connected in series.

  On the other hand, a diode D21, electromagnetic coils Rc21 and Rc22, a diode D22, electromagnetic coils Rc23 and Rc24, and a light emitting diode D2 are connected in series to the driver DRV0 in this order. That is, as described above, the diode D21 and the electromagnetic coils Rc21 and Rc22 are connected in series between the node n1 and the node n2, and the diode D22, the electromagnetic coils Rc23 and Rc24 are connected between the node n3 and the node n4. The cathodes of the light emitting diodes D2 are connected in series and connected to the node n5. The diodes D21 and D22 and the light emitting diode D2 have a rectifying action such that a forward current flows in the reverse order to this connection. This forward current is shown as the second direction current I− in FIG. Hereinafter, a circuit in which a diode and an electromagnetic coil are connected in series to have a rectifying action in which the second direction current I− flows is referred to as a second drive group DG21, DG22. A circuit in which the second drive groups DG21 and DG22 are connected in series is the second rectification unit 8.

  In FIG. 2, the second drive group DG21 is a circuit in which a diode D21, electromagnetic coils Rc21, and Rc22 are connected in series. Similarly, the second drive group DG22 is a circuit in which a diode D22 and electromagnetic coils Rc23 and Rc24 are connected in series. Here, the first direction current I + and the second direction current I− are opposite to each other. That is, the first drive group DG11 and the second drive group DG21 are connected in parallel so that currents flow in opposite directions. Similarly, the first drive group DG12 and the second drive group DG22 are connected in parallel so that currents flow in opposite directions. Hereinafter, the circuits formed in this way are called drive group pairs DGP1 and DGP2.

  That is, as shown in FIG. 2, the drive group pair DGP1 is formed by the first drive group DG11 and the second drive group DG21. Similarly, a drive group pair DGP2 is formed by the first drive group DG12 and the second drive group DG22. The two drive group pairs DGP1 and DGP2 are connected in series. Hereinafter, a circuit formed by connecting two or more drive group pairs in series in this way is referred to as a drive group pair block DGPB. For example, the drive group pair block DGPB1 is formed by the drive group pair DGP1 and the drive group pair DGP2. This drive group pair block DGPB1 constitutes the selection unit 1. Further, a constant voltage Vd is applied to both the cathode of the light emitting diode D1 and the anode of the light emitting diode D2.

  In the above description, in each drive group DG11, DG12, DG21, and DG22 according to the present embodiment, one diode is arranged corresponding to two electromagnetic coils. For example, a diode D11 is disposed corresponding to the electromagnetic coils Rc11 and Rc12, and similarly, a diode D12 is disposed corresponding to the electromagnetic coils Rc13 and Rc14. As described above, in the drive group according to the present embodiment, one diode is arranged corresponding to two electromagnetic coils. However, the present invention is not limited to this, and for example, the diode 1 for one electromagnetic coil. It may be individual. Alternatively, one diode may be used for four electromagnetic coils.

  More specifically, the method of actually manufacturing the selection unit 1 is, for example, arranging a plurality of electromagnetic relays on a substrate and connecting the terminals of the electromagnetic coils in these electromagnetic relays by printed wiring or the like. is there. In that case, what is necessary is just to determine suitably for how many electromagnetic coils one diode is arrange | positioned according to the relative position of several electromagnetic relays, ie, an electromagnetic coil, on a board | substrate. For example, the electromagnetic coils Rc11 and Rc12 are arranged close to each other as a first electromagnetic coil group, and similarly, the electromagnetic coils Rc13 and Rc14 are arranged close to each other as a second electromagnetic coil group, and the first electromagnetic coil When the group and the second electromagnetic coil group are separated from each other, diodes D11 and D12 are arranged corresponding to each electromagnetic coil group as shown in FIG. On the other hand, when the four electromagnetic coils Rc11, Rc12, Rc13, Rc14 are all arranged close to each other, one diode is arranged corresponding to all the four electromagnetic coils. do it. Further, in the case where the four electromagnetic coils Rc11, Rc12, Rc13, and Rc14 are all spaced apart from each other, a single diode should be disposed corresponding to each of the four electromagnetic coils. Good. As shown in FIG. 1 again, the input and output of the voltage and current of the measuring instrument 103 and the connection between the mechanical contacts Rs11 to Rs24, the probes 104a1 to 104d1, and the probes 104a2 to 104d2 are the same as in FIG.

  As shown in FIG. 1 again, when the measuring instrument 103 and the workpiece W1 are connected, the mechanical contacts Rs11, Rs12, Rs13, and Rs14 are simultaneously closed, and the mechanical contacts Rs21, Rs22, Rs23, and Rs24 are simultaneously opened. Further, when connecting the measuring instrument 103 and the workpiece W2, the mechanical contacts Rs11, Rs12, Rs13, and Rs14 are simultaneously opened, and the mechanical contacts Rs21, Rs22, Rs23, and Rs24 are simultaneously closed.

  As can be seen from these, the electromagnetic coils Rc11, Rc12, Rc13, Rc14 belonging to the first drive groups DG11, DG12 according to the present embodiment shown in FIG. 2 correspond to the mechanical contacts Rs11, Rs12, Rs13, Rs14, respectively. To do. Similarly, the electromagnetic coils Rc21, Rc22, Rc23, Rc24 belonging to the second drive group DG21, DG22 correspond to the mechanical contacts Rs21, Rs22, Rs23, Rs24, respectively. Therefore, each of the first drive groups DG11 and DG12 and the second drive groups DG21 and DG22 has a rectifying action by connecting four electromagnetic coils corresponding to four mechanical contacts that open and close at the same time in series. Is. As described above, the drive group pair DGP1 formed by the first drive group DG11 and the second drive group DG21, and the drive group pair formed by the first drive group DG12 and the second drive group DG22. The drive group pair block DGPB1 is formed by connecting DGP2 in series. As for the mechanical contacts corresponding to the respective drive groups constituting the drive group pair block DGPB1 formed in this way, the mechanical contacts with different drive groups are not simultaneously closed.

  As shown in FIG. 1, the control part 6 is arrange | positioned in the route selection system 10, and controls the control input setting part 2a by software. That is, the control unit 6 is connected to the control input setting unit 2a and controls the control input setting unit 2a so as to individually set one of the control inputs DC01 and DC02.

  The above is the description of the configuration of the route selection system 10 according to the present embodiment. Hereinafter, the control of the route selection system 10 will be described based on FIGS. 3A and 3B with reference to FIGS. 1 and 2.

  3A is a truth value showing the relationship between the control inputs DC01 and DC02 of the driver DRV0, the output DS0 of the driver DRV0, the direction of the current flowing through each drive group, and the currents of the electromagnetic coils Rc11 to Rc24 of the electromagnetic relays RL11 to RL24 in FIG. It is a figure shown as a table | surface. 3B shows the control inputs DC01 and DC02 of the driver DRV0, the output DS0 of the driver DRV0, the direction of the current, the state of the mechanical contacts Rs11 to Rs24 of the electromagnetic relays RL11 to RL24, the light emitting state of the light emitting diodes D1 and D2, and the work W1, It is a figure which shows the relationship of the connection state of W2 and the measuring device 103 as a truth table.

  Here, the control command will be described. The leftmost column of the truth table in FIG. 3A is a control instruction. The control command is transmitted to the control input setting unit 2a when the control unit 6 controls the control input setting unit 2a of the current generation unit 2 by software. The control instructions are identified by individually assigned numbers. In FIG. 3A, numbers [1] to [4] are assigned corresponding to the control instructions indicated by the columns. Next, the second column and the third column from the left end show the settings of the control inputs DC01 and DC02, respectively.

  The control inputs DC01 and DC02 are logic inputs, and take two values of H (high) level or L (low) level. In FIG. 3A, the H (high) level is described as “H”, and the L (low) level is described as “L”, and the same applies to the following description. Here, in the driver DRV0, when the control input DC02 is set to "L", the output DS0 is set to a high impedance state (a state where the control input DC01 is not electrically connected anywhere) regardless of the logic level of the control input DC01. Is done. In contrast, when the control input DC02 is set to “H”, the output DS0 is set to the constant voltage V− when the logic level of the control input DC01 is “L”, and the logic level of the control input DC01 is “H”. At this time, the output DS0 is set to the constant voltage V +.

  First, the control instructions [1] and [2] will be described. As shown in FIG. 3A, the control input DC02 of the control commands [1] and [2] is “L”. These are the initial states without control. The state of the driver output DS0 at this time is shown in the fourth column. Since the control inputs DC01 and DC02 of the driver DRV0 and the output DS0 have the relationship as described above, the output DS0 is set to a high impedance state (HZ). Here, as shown in FIG. 2, the cathodes of the light emitting diodes D1 that are the end points of the first drive groups DG11 and DG12 and the anodes of the light emitting diodes D2 that are the end points of the second drive groups DG21 and DG22 are fixed. A voltage Vd is applied. In the control numbers [1] and [2], since the output DS0 is set to the high impedance state (HZ), that is, the output DS0 is not electrically connected anywhere, the first drive group No current is applied to any of DG11 and DG12 and the second drive groups DG21 and DG22. This is described as “none” in the direction of current in the fifth row in FIG. 3A, and “none” is also described in the current of the electromagnetic coil of the electromagnetic relay in the sixth to thirteenth rows. In this state, as shown in FIG. 1, the mechanical contacts Rs11 to Rs14 belonging to the first drive groups DG11 and DG12 and the mechanical contacts Rs21 to Rs24 belonging to the second drive groups DG21 and DG22 are in an open state (OFF). is there.

  Further, the light emitting diodes D1 and D2 are turned off. This is shown in the truth table in the control instructions [1] and [2] in FIG. 3B. In addition, as shown in FIG. 3B, the off state is indicated by “off” and the on state is indicated by “lit” so that the on and off states of the light emitting diodes D1 and D2 can be intuitively understood by looking at the table. ing. As described above, the control commands [1] and [2] cause currents to flow through the electromagnetic coils Rc11 to Rc14 of the first drive groups DG11 and DG12 and the electromagnetic coils Rc21 to Rc24 of the second drive groups DG21 and DG22. There is no current stop mode. In the current stop mode, neither the workpiece W1 nor the workpiece W2 is connected to the measuring instrument 103.

  Next, the control instruction [3] in FIG. 3A will be described. In the control instruction [3], the control input DC02 is “L” and the control input DC01 is “L”. The state of the driver output DS0 when the control input is set in this way is set to the constant voltage V−. Here, since V− and Vd shown in FIG. 2 have a relationship of V− <Vd as described above, a reverse voltage is applied to the diodes D11 and D12 and the light emitting diode D1, and the diodes D21 and D22 are applied. A forward voltage is applied to the light emitting diode D2. That is, no current is applied to the first drive groups DG11 and DG12, and a second direction current I− is applied to the second drive groups DG21 and DG22. This is shown in the 6th to 13th columns of FIG. 3A. The mechanical contacts Rs11 to Rs14 (FIG. 1) belonging to the first drive groups DG11 and DG12 are opened (OFF), and the mechanical contacts Rs21 to Rs24 (FIG. 1) belonging to the second drive groups DG21 and DG22 are closed. It will be in the state (ON).

  Further, the light emitting diode D1 is turned off and the light emitting diode D2 is turned on. This state is shown in columns 6 to 15 in FIG. 3B. Further, the measuring instrument 103 and the workpiece W2 are connected by the open state and the closed state of these mechanical contacts. This is shown in the 16th and 17th columns of FIG. 3B. Here, the connection between the workpiece W2 and the measuring instrument 103 is described as “connection” in the 17th column. As described above, the control command [3] causes a current to flow through the electromagnetic coils Rc21 to Rc24 of the second drive groups DG21 and DG22 and does not flow a current to the electromagnetic coils Rc11 to Rc14 of the first drive groups DG11 and DG12. This is a current application mode.

  Next, in the control command [4], the control input DC02 is “L” and the control input DC01 is “H”. The state of the driver output DS0 when the control input is set in this way is set to the constant voltage V +. In FIG. 2, since V +> Vd as described above, a forward voltage is applied to the diodes D11 and D12 and the light emitting diode D1, and a reverse voltage is applied to the diodes D21 and D22 and the light emitting diode D2. Is applied. That is, the first direction current I + is applied to the first drive groups DG11 and DG12, and no current is applied to the second drive groups DG21 and DG22. This is shown in the 6th to 13th columns of FIG. 3A. The mechanical contacts Rs11 to Rs14 belonging to the first drive groups DG11 and DG12 are closed (ON), and the mechanical contacts Rs21 to Rs24 belonging to the second drive groups DG21 and DG22 are opened (OFF). Further, the light emitting diode D1 is turned on and the light emitting diode D2 is turned off. This state is shown in columns 6 to 15 in FIG. 3B. Further, the measuring instrument 103 and the workpiece W1 are connected by the open and closed states of these mechanical contacts. This is shown in the 16th and 17th columns of FIG. 3B. Here, the connection between the workpiece W1 and the measuring instrument 103 is described as “connection” in the sixteenth column. As described above, the control command [4] is a forward current application mode in which a current flows through the electromagnetic coils Rc11 to Rc14 of the first drive group and no current flows through the electromagnetic coils Rc21 to Rc24 of the second drive group.

  Thus, in the present embodiment, the work command W1 and the measuring instrument 103 in FIG. 1 are connected by the control command [4] as the positive voltage application mode, and the connection between the work W1 and the measuring instrument is a light emitting diode. Displayed by lighting D1. Similarly, the control command [3] as the reverse voltage application mode connects the workpiece W2 and the measuring instrument 103, and displays the connection between the workpiece W2 and the measuring instrument by turning on the light emitting diode D2. In the control commands [3] and [4], since only one of the first direction current I + and the second direction current I− shown in FIG. 2 flows, the workpiece W1 and the workpiece W2 are simultaneously connected to the measuring instrument 103. It will never be done. Further, the actual connection between the workpieces W1 and W2 and the measuring instrument 103 and the lighting of the light emitting diodes D1 and D2 do not become inconsistent.

  As shown in FIG. 2 again, the electromagnetic coils Rc11 to Rc14 included in the first drive groups DG11 and DG12 are connected in series, and the electromagnetic coils Rc21 to Rc24 included in the second drive groups DG21 and DG22 are connected in series. Therefore, the number of wirings is smaller than that of the conventional route selection system 100. That is, the number of wirings related to the selection unit 1 and the current generation unit 2 in the route selection system 10 according to the present embodiment is the number of wirings related to the selection unit 101 and the current generation unit 102 in the conventional route selection system 100 shown in FIG. Less than For this reason, possibility that a wiring will be cut | disconnected reduces more, and the reliability of the selection unit 1 and the electric current generation part 2 improves more also from this point.

  Further, when the wiring is cut, the plurality of mechanical contacts Rs11 to Rs14 or Rs21 to Rs24 do not operate at the same time, so that the broken portion can be easily determined. For example, when control for applying a current to the electromagnetic coils Rc11 to Rc14 constituting the first drive groups DG11 and DG12 was executed, the wiring in the first drive groups DG11 and DG12 was cut off somewhere. In this case, the currents to be applied to the electromagnetic coils Rc11 to Rc14 and the light emitting diode D1 in the first drive groups DG11 and DG12 disappear simultaneously. Accordingly, the inspection by the measuring instrument 103 in FIG. 1 cannot be performed at all, and the light-emitting diode that should be turned on in the display unit 5 remains off. For this reason. The operator can immediately determine that the wiring in the drive groups DG11 and DG12 is cut off somewhere.

  Further, since each of the first drive groups DG11 and DG12 having a rectifying action in the first direction and the second drive groups DG21 and DG22 having a rectifying action in the second direction are connected between the node n1 and the node n4, 3 Specific workpieces W1 and W2 to be connected to the measuring instrument 103 can be selected using simple control for switching between types of modes. For this reason, the reliability of software is further improved.

  In the above description, the workpieces to be inspected are two workpieces W1 and W2 shown in FIG. Here, an increase in the selection unit 1 when the number of workpieces to be inspected increases will be described with reference to FIG. FIG. 4 is a diagram illustrating an increase in the selection unit 1 when the number of workpieces to be inspected increases. Here, two selection units 1 of FIG. 1 are installed, and two are provided for the current output terminal IH, the current input terminal IL, the high potential side voltage input terminal VH, and the low potential side voltage input terminal VL of the measuring instrument 103. 1 shows a state in which one end of a corresponding mechanical contact in the selection unit 1 is connected. That is, FIG. 4 shows a connection state between the mechanical contacts Rs11 to Rs24 and the measuring instrument 103 when there are four workpieces W1, W2, W3, and W4 to be inspected. Although not shown, the current generation unit 2 and the display unit 5 shown in FIG. 1 are individually provided for each of the two selection units 1 and 1. And the control part 6 of the structure equivalent to the control part 6 shown in FIG. 1 is provided. That is, the control unit 6 in FIG. 4 transmits a control command to both of the control input setting units 2 a in the two current generation units 2. As described above, the path selection system 10 includes a plurality of selection units 1 and 1 sharing the measuring instrument 103, and each of the selection units 1 and 1 includes at least one electromagnetic relay and workpieces W1 and W2 that are objects. W3 and W4 are provided.

  As shown in FIG. 4, there are four workpieces W1, W2, W3, and W4 to be inspected connected to the measuring instrument 103. The workpieces W1 and W2 and the workpieces W3 and W4 form a set and correspond to the selection units 1 and 1, respectively. Here, the case where the workpiece | work W1 is connected to the measuring device 103 is demonstrated. First, in the selection unit 1 (on the left side in FIG. 4) corresponding to the workpieces W1 and W2, the control command [4] (positive current application mode) shown in FIGS. 3A and 3B is executed. That is, the control unit 6 transmits a control command [4] to the control input setting unit 2a related to the selection unit 1 corresponding to the workpieces W1 and W2. At the same time, the control number [1] or [2] (current stop mode) shown in FIGS. 3A and 3B is executed in the selection unit 1 (on the right side in FIG. 4) corresponding to the workpieces W3 and W4. That is, the control unit 6 transmits the control number [1] or [2] to the control input setting unit 2a related to the selection unit 1 corresponding to the workpieces W3 and W4. At this time, in the selection unit 1 corresponding to the workpieces W1 and W2, the workpiece W1 is connected to the measuring instrument 103 as described above, and the workpiece W2 is not connected. In the corresponding display unit 5 (FIG. 1), the light emitting diode D1 is turned on and D2 is turned off. Further, in the selection unit 1 corresponding to the workpieces W3 and W4, none of the workpieces W3 and W4 is connected to the measuring instrument 103 as described above. Then, in the corresponding display unit 5, both the light emitting diodes D1 and D2 are turned off.

  As another example, in order to connect the workpiece W4 to the measuring instrument 103 in FIG. 4, the control unit [1] or [2] (current stop mode) is executed simultaneously with the selection unit 1 corresponding to the workpieces W1 and W2. In the selection unit 1 corresponding to the workpieces W3 and W4, the control command [3] (reverse current application mode) may be executed. In this case, the control unit 6 transmits a control command [1] or [2] to the control input setting unit 2a related to the selection unit 1 corresponding to the workpieces W1 and W2, and simultaneously corresponds to the workpieces W3 and W4. The control command [3] is transmitted to the control input setting unit 2a related to the selection unit 1. In this way, neither of the workpieces W1 and W2 is connected to the measuring instrument 103 by the control command [1] or [2], and the light emitting diodes D1 and D2 are not connected to the corresponding display unit 5 (FIG. 1). Turns off. In addition, the workpiece W4 is connected to the measuring instrument 103 and the workpiece W3 is not connected by the control command [3]. In the corresponding display section 5, the light emitting diode D1 is turned off and D2 is turned on. Thus, none of the two workpieces W1 and W2 shown in FIG. 1 is connected to the measuring instrument 103 in the control command [1] or [2]. Using this, when the number of workpieces to be inspected increases as shown in FIG. 4, the control input setting unit 2 a related to the selection unit 1 in which no two corresponding workpieces are connected to the measuring instrument 103. Then, the control unit transmits a control command [1] or [2]. Thereby, it is possible to easily realize a state in which neither of the two workpieces corresponding to the selection unit 1 is connected to the measuring instrument 103.

  As can be seen from these, it is possible to easily expand the functions of the selection unit 1 by increasing the selection unit 1, the current generation unit 2, and the display unit 5 when the number of workpieces increases. In addition, the software of the control unit 6 for realizing this function expansion provides a control command [1] or [2] (current stop mode) and a control command [3] (reverse) to a plurality of control input setting units 2a. Directional current application mode) and control command [4] (positive direction current application mode) are only transmitted. Moreover, as described above, different workpieces are not simultaneously connected to the measuring instrument by each control. For this reason, the reliability of the selection unit 1 and the current generator 2 is further improved, and the software is further simplified to further improve the reliability.

  In FIG. 4, the number of workpieces is four. However, even when the number of workpieces further increases, the number of selection units 1, current generation units 2, and display units 5 is increased in the same manner, so that the control unit 6 It is possible to cope easily by switching the control command to be transmitted to the control input setting unit 2a according to the three modes described above.

  The drive groups DG11, DG12, DG21, and DG22 according to the present embodiment have two electromagnetic coils connected in series. However, the drive groups DG11, DG12, DG21, and DG22 are, for example, one electromagnetic coil. It may be constituted by. In the above description, the two drive group pairs DGP1 and DGP2 are connected in series to form the drive group pair block DGPB1, but the drive group pair DGP1 and DGP2 constituting the drive group pair block DGPB1 are Only one is good.

  As described above, according to the present embodiment, the first drive groups DG11 and DG12 in which the electromagnetic coils Rc11 to Rc14 corresponding to the mechanical contacts Rs11 to Rs14 to which the first wiring path related to the workpiece W1 is connected are connected in series. Each of the second drive groups DG21 and DG22 in which the electromagnetic coils Rc21 to Rc24 corresponding to the mechanical contacts Rs21 to Rs24 to which the second wiring path related to the work W2 is connected has a rectifying action in different directions, and these Two drive groups are connected between the node n1 and the node n4, and the current direction is switched between the nodes n1 and n4 for application. Accordingly, the mechanical contacts Rs11 to Rs14 included in the first drive groups DG11 and DG12 and the mechanical contacts Rs21 to Rs24 included in the second drive groups DG21 and DG22 are not simultaneously closed. When one of W1 and W2 is selected and connected to the measuring instrument, it is avoided that different workpieces are connected to the measuring instrument 103 at the same time.

  The display unit 5 is connected in series to one end of the first drive groups DG11 and DG12, and the light emitting diode D1 is turned on when a current flows in the same direction as the rectification direction of the first drive groups DG11 and DG12. It is composed of a light emitting diode D2 that is connected in series to one end of the second drive group DG21, DG22 and that is lit when a current flows in the same direction as the rectification direction of the second drive group DG21, DG22. It is also avoided that the workpieces W1 and W2 connected to the container 103 and the workpieces W1 and W2 indicated by the display unit 5 do not coincide with each other.

Furthermore, since the electromagnetic coils Rc11 to Rc14 and the light emitting diode D1 are connected in series, and the electromagnetic coils Rc21 to Rc24 and the light emitting diode D2 are connected in series, the electromagnetic coils Rc11 to Rc14 and the light emitting diode D1, or the electromagnetic coils Rc21 to Rc24 and the light emitting device. Since there are only three types of control commands for causing a current to flow through the diode D2, the current stop mode, the reverse current application mode, and the forward current application mode, the software reliability is further improved. Further, when the wirings of the electromagnetic coils Rc11 to Rc14 and the light emitting diode D1 connected in series or the electromagnetic coils Rc21 to Rc24 and the light emitting diode D2 are disconnected, the plurality of mechanical contacts Rs11 to Rs14 or the plurality of mechanical contacts Rs21 to Rs24 do not operate simultaneously. Therefore, it is also possible to more easily determine the cut location.
(Modification of one embodiment)

  The selection unit 1 according to the embodiment uses the electromagnetic relays R11 to R24 in order to put the wiring path connecting the measuring instrument 103 and the workpieces W1 and W2 into a cut-off state or a conductive state, whereas the selection unit 1 according to the embodiment This modification is different in that semiconductor relays PC11 to PC24 are used. Hereinafter, differences from the embodiment will be described. In the following description, components having functions and configurations equivalent to those of the route selection system 10 according to the embodiment are denoted by the same reference numerals, and description thereof is omitted unless necessary.

  FIG. 5 is a diagram illustrating a configuration of a route selection system 10x according to a modification of the embodiment. As shown in FIG. 5, a selection unit 1 x is provided instead of the selection unit 1 in the route selection system 10. That is, the selection unit 1x is obtained by replacing the electromagnetic relays R11 to R24 in FIG. 1 with relays PC11 to PC24 (hereinafter referred to as “semiconductor relays”) using semiconductor elements called semiconductor relays or solid state relays. The semiconductor relays PC11 to PC24 may be called optical MOSFETs or photo MOSFETs. The semiconductor relay PC11 includes a light emitting diode PD11 and an FET (field effect transistor) PQ11. That is, when no forward current is applied to the light emitting diode PD11, the drain-source of the FET PQ11 is in a cut-off state (OFF). Further, when a forward current is applied to the light emitting diode PD11 to emit light, the drain-source of the FET PQ11 becomes conductive (ON). When the application of the forward current is stopped, the light emitting diode PD11 disappears, and the drain-source region of the FET PQ11 returns to the cutoff state (OFF) again. The same applies to the other semiconductor relays PC12 to PC24. As described above, the operations of the FETs PQ11 to PQ24 are switched depending on the light emitting states of the corresponding light emitting diodes PD11 to PD24. The light emitting diodes PD11 to PD24 and the FETs PQ11 to PQ24 are electrically insulated, and even if noise is superimposed on the circuit side to which the light emitting diode PD11 is connected, the noise is transmitted to the circuit side to which the FET PQ11 is connected. And noise resistance is increased. The path opening / closing unit according to this embodiment includes field effect transistors PQ11 to PQ24, and the opening / closing control unit according to this embodiment includes light emitting diodes PD11 to PD24.

  As shown in FIG. 5, the connection method of the light emitting diodes PD11 to PD24 in each of the semiconductor relays PC11 to PC24 is the same as the connection method of the electromagnetic coils Rc11 to Rc24 in FIG. Here, in FIG. 5, the first drive group is formed by connecting the plurality of light emitting diodes PD11 to PD14 with the same polarity, and the plurality of light emitting diodes PD21 to PD24 are similarly connected with the same polarity. As a result, a second drive group is formed. Then, the first drive group and the second drive group are connected in parallel so that currents flow in opposite directions to form a drive group pair. Thus, since each drive group is formed using the fact that the light emitting diodes PD11 to PD24 have polarity, the diodes such as D11, D12, D21, and D22 in FIG. 1 are used in FIG. Absent.

  As described above, according to the modification of the embodiment, the relay is constituted by the semiconductor relays PC11 to PC24. As a result, the same effects as those of the embodiment can be obtained, the selection unit 2 can be further downsized, and magnetic interaction can be suppressed.

  In the above description, two probes contact each electrode of the workpieces W1 to W4 according to the present embodiment. However, the number of probes that contact each other is not limited to two. In addition, although two electrodes are formed on one workpiece according to the present embodiment, the number of electrodes is not limited to this, and may be three or more, for example. In addition, one element is built in one work. However, the present invention is not limited to this, and a plurality of two or more elements may be built in one work. Further, in the present embodiment, a case where a plurality of electronic components, that is, a plurality of electrical wirings are connected to a plurality of workpieces, has been described. However, the present invention is not limited to this. A plurality of electrical wirings may be connected.

  Furthermore, in the above description, the display unit 5 connected to the measuring instrument 103 and capable of visually confirming the workpieces W1 to W4 being inspected is provided. However, the display unit 5 may not be provided. In the above description, the path selection system 10 connects the input or output of the voltage or current of the measuring instrument 103 and a plurality of probes that contact the electrodes of the plurality of workpieces W1 to W4. Alternatively, an electric circuit having some function, such as an amplifier circuit or a filter, is disposed, and the voltage or current input or output of the electric circuit is connected to the electrodes of the plurality of workpieces W1 to W4. The control method of the route selection system 10 can be applied.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1: selection unit, 2: current generation unit, 5: display unit, 6: control unit, 7: first rectification unit, 8: second rectification unit, 103: measuring instrument, W1, W2, W3, W4: work, D1, D2: Light-emitting diodes, PD11-PD24: Light-emitting diodes, D11, D12, D21, D22: Diodes, RL11-RL24: Electromagnetic relays, Rc11-Rc24: Coils, Rs11-Rs24: Mechanical contacts, PC11-PC24: Semiconductor relays , PQ11 to PQ24: FET, DG11, DG12: first drive group, DG21, DG22: second drive group

Claims (15)

A first rectification unit for flowing current in a first direction; and a second rectification unit for flowing current in a second direction opposite to the first direction, both ends of the first rectification unit and the second rectification A selection unit that is connected in parallel so that the respective rectification directions are opposite to both ends of the unit, and that selects an object to be connected to a predetermined electric circuit device;
A current generator for generating a current to flow through the first rectifier or the second rectifier;
A control unit for controlling the current generation unit;
With
Each of the first rectification unit and the second rectification unit has at least one relay opening / closing control unit,
A route selection system in which connection between the electric circuit device and the object is switched according to an open / close state of the relay.   The current generator has a state in which current flows in the first direction, a state in which current flows in a second direction opposite to the first direction, and a state in which current does not flow in any direction. The route selection system according to claim 1. As candidates for the selection unit to select as the object, a first object and a second object are provided,
When the first rectifier flows current in the first direction, the electric circuit device is connected to the first object,
3. The path selection system according to claim 1, wherein the electric circuit device is connected to the second object when the second rectification unit passes a current in the second direction. The relay has a plurality of first relays provided in the first rectification unit, and a plurality of second relays provided in the second rectification unit,
The plurality of first relays are electrically connected or disconnected in synchronization between respective input / output paths,
The path selection system according to any one of claims 1 to 3, wherein the plurality of second relays are electrically connected to or disconnected from each input / output path.   The current generation unit sets a current supply node to the first rectification unit and the second rectification unit in a high impedance state when no current flows through the first rectification unit and the second rectification unit; The route selection system according to any one of claims 1 to 4. A plurality of the selection units sharing the electrical circuit device;
The route selection system according to any one of claims 1 to 5, wherein the at least one relay and the object are provided for each selection unit in the plurality of selection units.   The control unit controls the current generation unit to cause the current in the first direction or the second direction to flow through a specific selection unit in the plurality of selection units, and in the plurality of selection units. The path selection system according to claim 6, wherein the current generation unit is controlled so as not to cause a current to flow through the relays included in other selection units other than the specific selection unit.   8. The path selection system according to claim 1, wherein each of the first rectification unit and the second rectification unit includes a rectification element in addition to the relay. The relay is an electromagnetic relay,
The relay is
The open / close control unit having an electromagnetic coil;
A path opening and closing portion having a mechanical contact,
9. The path selection system according to claim 8, wherein each of the first rectification unit and the second rectification unit includes a circuit in which a plurality of the electromagnetic coils and one or more rectification elements are connected in series in a predetermined order. . The path opening / closing part in the relay and the corresponding opening / closing control part are electrically insulated,
The route selection system according to claim 9, wherein the opening / closing control unit has a rectifying action. The relay is
The open / close control unit having a first light emitting diode;
A path opening / closing unit having a field effect transistor whose operation is switched according to a light emitting state of the first light emitting diode,
8. The path selection system according to claim 7, wherein each of the first rectification unit and the second rectification unit includes a circuit in which a plurality of the first light emitting diodes are connected in series in a predetermined order. A second light emitting diode that is connected to one end of the first rectifying unit and lights when a current flows in the first direction;
The path selection system according to any one of claims 1 to 11, further comprising: a third light emitting diode that is connected to one end of the second rectification unit and lights up when a current flows in the second direction. One end of the first rectification unit is connected to the first node, the other end is connected to a second node different from the first node, and one end of the second rectification unit is connected to the first node. The other end is connected to the second node,
The relay included in the first rectification unit is connected to a first wiring path that connects the electric circuit device and the first object, and the relay included in the second rectification unit includes the electric circuit device and the relay. A second wiring path for connecting a second object different from the first object is connected;
The first rectification unit makes the first wiring path conductive when a current in the first direction flows between the first node and the second node,
The said 2nd rectification | straightening part makes the said 2nd wiring path | route a conduction | electrical_connection state when the electric current of the said 2nd direction flows between the said 1st node and the said 2nd node. The route selection system according to claim 1.   14. The path selection system according to claim 1, wherein the object is a chip-type electronic component having at least one of a resistor, a capacitor, and a coil.   The path selection system according to claim 1, wherein the electric circuit device is a measuring instrument that inspects electric characteristics of the object.

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