JPH0348545Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a terminal device for testing the characteristics of electronic equipment, which tests the characteristics of electronic equipment.

(Prior Art) As an example of this type of device, a case where the device is applied to an electronic watt-hour meter will be described with reference to the configuration diagram shown in FIG. In this device, characteristics tests were conducted on the output part of the power-frequency conversion circuit 1 that converts the input power P into a pulse frequency signal proportional to the input power P, and the input part of the frequency divider circuit 2 that divides this pulse frequency signal. Terminals 3 and 4 are provided, and a detachable connection conductor 5 is connected to these terminals 3 and 4 for characteristic testing. 6 is a counting circuit that counts the frequency-divided signal of the frequency dividing circuit 2, and 7 is a display unit that displays the amount of power counted by the counting circuit 6.

When performing a characteristic test on the above device, the connecting conductor 5 is removed from the test terminals 3 and 4, and a characteristic test device (not shown) is connected to the terminal 3 to test the characteristics of the power-frequency circuit 1. A test signal source (not shown) is connected to terminal 4 to test the characteristics of frequency divider circuit 2 and beyond.

However, with the above characteristic test terminal device,
Test work is complicated due to mechanical connection changes, and in particular, characteristic test terminals 3 and 4 are provided between each component part 1 and 2, 2 and 6, and 6 and 7, respectively. , 6 and 7, it is necessary to disconnect the connecting conductor 5 from each of the test terminals 3 and 4, connect the test signal source, etc., and reconnect the connecting conductor 5, making the test work increasingly complicated. Become something. This problem occurs not only in electronic wattmeters but also in electronic devices having many components.

(Problems to be solved by the invention) As described above, the task of testing the characteristics of electronic devices consisting of multiple components has become complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a characteristic test terminal device for an electronic device, which allows a characteristic test to be easily performed regardless of the number of components.

[Structure of the invention] (Means for solving the problem) The present invention provides a switch that is provided between each of a plurality of series-connected components in an electronic device and connects and separates the preceding component and the subsequent component. A first light-receiving element that opens and closes the switch in response to light reception;
A characteristic test connection terminal section having a second light receiving element connected to a downstream component side of the light emitting element and the switch and receiving a characteristic test signal for the downstream component as light; It has a second light emitting element that emits light, a third light emitting element that emits the characteristic test signal as light, and a third light receiving element that receives the characteristic signal as light, and the second and third light emitting elements and the third light receiving element. The second and third light emitting elements are arranged on the block body at positions facing the first and second light receiving elements, respectively, and the third light receiving element is connected to the first light emitting element. This is a characteristic test terminal device for an electronic device that attempts to achieve the above object by including signal input/output terminal portions arranged in opposing positions.

(Function) By providing such a means, the switch of the connection terminal section for characteristic testing is connected between the front stage component and the rear stage component, and the first light receiving element, second light receiving element and the second light receiving element of the same part are connected. The second light emitting element and the third light emitting element are respectively located in the signal input/output terminal section with respect to the first light emitting element.
The light-emitting element and the third light-receiving element face each other, and when a switch opening/closing signal is applied to the second light-emitting element in this state, this switch opening/closing signal is sent as light to the first light-receiving element, which opens and closes the switch, thereby opening and closing the previous stage component. and the subsequent component are connected and separated. Further, the characteristic signal from the first stage component is transmitted as light from the first light receiving element to the third light receiving element, and the characteristic test signal supplied to the second stage component is transmitted as light from the third light emitting element to the second light receiving element. and supplied to subsequent components.

(Embodiment) Hereinafter, a case where an embodiment of the present invention is applied to, for example, an electronic watt-hour meter will be described with reference to the drawings. In FIG. 1, 11 is a power-frequency converter circuit that converts the input power P into a pulse frequency signal proportional to the input power P, 12 is a frequency divider circuit that divides the output signal of the circuit 11, and 13 is a frequency divider circuit that divides the frequency divided signal of the frequency divider circuit 12. A counting circuit 14 is a display unit that displays the amount of power counted by the counting circuit 13. Further, between each component part, for example, between 11 and 12, between 12 and 13, and between 13
and 14, respectively, a connection terminal section 15 for characteristic testing.
has been established.

Next, FIG. 2 is a diagram showing a specific configuration example of the characteristic test connection terminal section 15 and the signal input/output terminal section 16 shown in FIG. 1. Reference numeral 15-1 is a switch inserted between each component, and has the function of turning off when light is received by the light receiving element 15-2. This light receiving element 15-2 has one end grounded, and the other output end connected to the switch 15-1 and also to the power supply _VDD via a resistor. Reference numeral 15-3 is a transistor connected to a component on the previous stage, for example, the power-frequency circuit 11 side, one end of this transistor 15-3 is grounded, and the other end is connected to a series circuit of a light receiving element 15-4 and a resistor. It is connected to the DC power supply _VDD via. Reference numeral 15-5 denotes a light receiving element, one end of which is grounded, and the other end connected to a downstream component such as the frequency dividing circuit 12 via an inverter 15-6, and also connected to the DC power supply V _DD via a resistor. is connected to.

On the other hand, in the case of the signal input/output terminal section 16, a light-receiving element that inputs light to the light-receiving element 15-2 is connected to the output side of a transistor 16-2, which has a terminal 16-1 for inputting a switch opening/closing signal as an input part. 16-3, and the light receiving element 15-4.
The light receiving element 15-5 is connected to the output side of the transistor 16-6, which has a terminal 16-5 as an input section for inputting a characteristic test signal.
A second light emitting element 16-7 is connected to which the light is incident.
It is equipped with a circuit.

FIG. 3 is a diagram showing an example of mounting the signal input/output terminal section 16 on the characteristic test connection terminal section 15. For example, the connection terminal block 21 is provided with a long hole 22, and the light receiving elements 15-2 of the connection terminal 15 for characteristic testing are arranged in a predetermined arrangement on the wall of the long hole 22.
15-5 and an emitting element 15-3, while
The signal input/output section 16 is a block body 23 in which an emitting element 16-3, a light receiving element 16-4, and a light emitting element 16-7 are arranged in a predetermined arrangement, and this block body 23 is inserted into the elongated hole section 22. .

Next, the operation of the device configured as above will be explained. For convenience of explanation, a case will be described in which, for example, the characteristics of the power-frequency conversion circuit 11 and the characteristics after the frequency dividing circuit 12 are tested.

First, connect the block body 23 to the connecting terminal block 21.
Insert into the long hole 22 of. As a result, the light receiving element 15-2 and the light emitting element 16-3 face each other, and similarly the light emitting element 15-4 and the light receiving element 16-4, and the light receiving element 1
5-5 and the light-emitting element 16-7 face each other, and photocouplers are formed by the light-emitting element and the light-receiving element facing each other.

After setting the state as described above, when a switch opening/closing signal is input to the terminal 16-1, this signal turns on the transistor 16-2 and current flows through the light emitting element 16-3. As a result, light emitting element 1
6-3 emits light, this light is received by the light receiving element 15-2 of the connection terminal section 15 for characteristic testing, and the switch 15-1 is opened by this light receiving operation. Therefore, by the above operation, the power-frequency conversion circuit 1
1 and the frequency dividing circuit 12 are electrically separated.

By the way, since the characteristic test connection terminal section 15 is connected to the output section of the power-frequency conversion circuit 11, when the input power P or the characteristic test signal is input to the circuit 11, the transistor 15-3 is turned on and the light emitting element is turned on. A current flows through 15-4. Therefore, light emitting element 1
5-4 emits light, which is received by the light receiving element 16-4 of the signal input/output section 16 and operates. Therefore, by connecting the characteristic test equipment to the terminals 16-8 and 16-9 of the signal input/output section 16, the power-frequency conversion circuit 1
1 property can be tested.

Furthermore, when a characteristic test signal is input to the terminal 16-5 of the signal input/output section 16, the transistor 16-6
When turned on, the light emitting element 16-7 emits light, and this light is transmitted to the light receiving element 15-7 of the connection terminal section 15 for characteristic testing.
Receives light at 5. The light receiving operation signal of this element 15-5 is then supplied to the input section of the frequency dividing circuit 12 via an inverter 15-6. As a result, the components after the frequency dividing circuit 12 operate, and the results are displayed on the display section 14. Therefore, the characteristics after the frequency dividing circuit 12 can be easily tested from this display result.

The characteristics after the frequency dividing circuit 12 and the counting circuit 13, as well as the characteristics of each other component part, can be determined by selecting the appropriate connection terminal section 15 for characteristic testing and mounting the signal input/output terminal section 16. Characteristic tests can be easily performed.

In addition, although the above embodiment was applied to an electronic watt-hour meter, it goes without saying that the present invention is not limited to this. Moreover, various means for mounting the signal input/output terminal section 16 to the characteristic test connection terminal section 15 are conceivable. For example, when performing a characteristic test on all of the component parts 11 to 14, the characteristic test connection terminal section 15,...
All the light receiving elements 15-2,..., the light emitting elements 15-
3, . . . and the light receiving elements 15-5, . . . may be arranged in the same connection terminal block 21.
In addition, various modifications can be made without changing the gist of the present invention.

[Effects of the invention] As detailed above, according to the invention, a connection terminal section for characteristic testing is provided between each component part of an electronic device, a switch is connected between each component part, and a connection terminal section for this characteristic test is provided. The second light-emitting element, the third light-emitting element, and the third light-receiving element of the signal input/output terminal part are respectively opposed to the first light-receiving element, the second light-receiving element, and the first light-emitting element of the connection terminal part. A switch opening/closing signal is applied to the two light-emitting elements to open and close the switch to connect and separate the front-stage component and the rear-stage component, and the characteristic signal from the front-stage component is used as light to pass from the first light-emitting element to the third light-receiving element. Since the characteristic test signal taken out through the cable and supplied to the subsequent components is transmitted as light from the third light emitting element to the second light receiving element, characteristic tests can be easily and quickly performed without complicated test work. Moreover, it is possible to adjust and measure the characteristics of each component, and to perform these adjustments and characteristics measurements simultaneously and in a short time. Furthermore, since a photocoupler is formed by each light emitting element and each light receiving element facing each other, they are electrically insulated and are less susceptible to noise and the like.

[Brief explanation of drawings]

1 to 3 are diagrams for explaining one embodiment of the characteristic test terminal device for electronic equipment according to the present invention, in which FIG. 1 is a schematic configuration diagram applied to an electronic watt-hour meter, and FIG. Figure 2 is a circuit configuration diagram showing the main parts of the present invention, Figure 3 is a diagram showing how the signal input/output terminal section is mounted on the connection terminal section for characteristic testing in Figure 2, and Figure 4 is an electronic power consumption diagram. 1 is a diagram showing a schematic configuration of a conventional device applied to a meter. 11... Power-frequency circuit, 12... Frequency dividing circuit, 13... Counting circuit, 14... Display unit, 15...
... Connection terminal section for characteristic test, 15-1... Switch, 15-2... Light receiving element, 15-4... Light emitting element, 15-5... Light receiving element, 16... Signal input/output terminal section, 16- 3... Light emitting element, 16-4... Light receiving element, 16-7... Light emitting element.

Claims (1)

[Scope of utility model registration request] A switch provided between each of a plurality of series-connected components in an electronic device to connect and separate the preceding component and the subsequent component, a first light receiving element that opens and closes the switch in response to light reception, and the switch. A first light emitting element connected to the front component side of the switch and emitting light in response to a characteristic signal from the front component part; and a first light emitting element connected to the rear component side of the switch and used for characteristic testing of the rear component part. a characteristic test connection terminal portion having a second light receiving element that receives a signal as light; a second light emitting element that emits a switch opening/closing signal for the switch as light; and a third light emitting element that emits the characteristic test signal as light. and a third light-receiving element that receives the characteristic signal as light, and has respective terminals connected to the second and third light-emitting elements and the third light-receiving element; The second and third light emitting elements are respectively connected to the first and second light emitting elements.
A characteristic testing terminal device for electronic equipment, comprising: a signal input/output terminal section arranged at a position facing a light receiving element and at a position where the third light receiving element faces the first light emitting element.