CN210863859U - Measuring instrument and measuring device - Google Patents
Measuring instrument and measuring device Download PDFInfo
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- CN210863859U CN210863859U CN201921497561.1U CN201921497561U CN210863859U CN 210863859 U CN210863859 U CN 210863859U CN 201921497561 U CN201921497561 U CN 201921497561U CN 210863859 U CN210863859 U CN 210863859U
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Abstract
The utility model discloses a measuring instrument and a measuring device, wherein the measuring instrument comprises a pointer voltmeter, a first switch, a second switch and a circuit on-off measuring circuit, and the pointer voltmeter comprises a voltage measuring circuit, a positive wiring column and a negative wiring column; one input end of the first switch is connected with one end of the line on-off detection circuit, the other input end of the first switch is connected with one end of the voltage measurement circuit, and the output end of the first switch is connected with the positive wiring column; one input end of the second switch is connected with the other end of the line on-off detection circuit, the other input end of the second switch is connected with the other end of the voltage measurement circuit, and the output end of the second switch is connected with the negative wiring terminal. The utility model provides a measuring instrument and measuring device has realized the reuse to old voltmeter.
Description
Technical Field
The utility model relates to a measuring instrument technical field, concretely relates to measuring instrument and measuring device.
Background
The pointer type voltmeter is a voltmeter which applies a magnetoelectric principle to drive a pointer to move and displays the voltage by depending on the staying position of the pointer on a panel. Fig. 1 is a schematic diagram of a front structure of a conventional pointer type voltmeter, in which a display panel 11 is used for displaying the voltage of a circuit to be tested; FIG. 2 is a schematic side view of the pointer type voltmeter, a positive terminal 21 and a negative terminal 22 are arranged on the back of the pointer type voltmeter, wherein the positive terminal 21 is used for connecting the positive pole of the circuit to be tested, and the negative terminal 22 is used for connecting the negative pole of the circuit to be tested; fig. 3 is an equivalent schematic diagram of a voltage measuring circuit 31 inside the pointer type voltmeter, one end of the voltage measuring circuit 31 is connected with the positive terminal 21, and the other end of the voltage measuring circuit 31 is connected with the negative terminal 22.
When the device is modified and replaced, some pointer type voltmeters which are older and older are replaced. Because the pointer type voltmeter contains more harmful substances, the influence caused by random discarding is great. Therefore, how to reuse the old pointer type voltmeter becomes a problem which is more concerned in the industry.
SUMMERY OF THE UTILITY MODEL
The utility model discloses what solve is how to carry out reuse's problem to old voltmeter.
The utility model discloses a following technical scheme realizes:
a measuring instrument comprises a pointer type voltmeter, a first switch, a second switch and a circuit on-off measuring circuit, wherein the pointer type voltmeter comprises a voltage measuring circuit, a positive wiring column and a negative wiring column;
one input end of the first switch is connected with one end of the line on-off detection circuit, the other input end of the first switch is connected with one end of the voltage measurement circuit, and the output end of the first switch is connected with the positive wiring column;
one input end of the second switch is connected with the other end of the line on-off detection circuit, the other input end of the second switch is connected with the other end of the voltage measurement circuit, and the output end of the second switch is connected with the negative wiring terminal.
Optionally, the circuit on-off measuring circuit includes a voltage source, a light emitting unit and a sound emitting unit;
the positive pole of the voltage source is used as one end of the circuit on-off measuring circuit, the negative pole of the voltage source is connected with one end of the light-emitting unit and one end of the sound-generating unit, and the other end of the light-emitting unit is connected with the other end of the sound-generating unit and used as the other end of the circuit on-off measuring circuit.
Optionally, the light emitting unit includes a light emitting diode and a first resistor;
one end of the first resistor is used as one end of the light emitting unit, the other end of the first resistor is connected with the anode of the light emitting diode, and the cathode of the light emitting diode is used as the other end of the light emitting unit.
Optionally, the light emitting unit further includes a first fuse connected in series with the light emitting diode and the first resistor.
Optionally, the sounding unit includes a second resistor, a third resistor, a capacitor, an NPN triode, a buzzer, and an anti-reverse diode;
one end of the second resistor serves as one end of the sounding unit, the other end of the second resistor is connected with one end of the third resistor, one end of the capacitor and the base electrode of the NPN triode, the other end of the third resistor, the other end of the capacitor and the emitting electrode of the NPN triode are grounded, the collector electrode of the NPN triode is connected with one end of the buzzer, the other end of the buzzer is connected with the cathode of the anti-reflection diode, and the anode of the anti-reflection diode serves as the other end of the sounding unit.
Optionally, the line break-make measurement circuit further includes a second fuse connected in series with the voltage source.
Optionally, the measuring instrument further comprises a third fuse connected in series between the other input terminal of the first switch and one end of the voltage measuring circuit and/or a fourth fuse connected in series between the other input terminal of the second switch and the other end of the voltage measuring circuit.
Optionally, the measuring instrument further includes a red meter pen connected to the positive terminal and a black meter pen connected to the negative terminal.
Optionally, the first switch and the second switch are microswitches.
Based on the same inventive concept, the utility model also provides a measuring device, including portable package and above-mentioned measuring instrument, measuring instrument sets up in portable package.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model provides a measuring instrument and measuring device sets up first switch, second switch and circuit break-make measuring circuit through increasing on the basis of pointer voltmeter, right the pointer voltmeter reforms transform, will pointer voltmeter reforms transform into the instrument that can measure the voltage of circuit under test and measure the circuit break-make, realizes carrying out reuse to old voltmeter. The measuring instrument and the measuring device provided by the utility model are improved by using the old voltmeter, so the cost is lower; the measuring instrument and the measuring device are small in structure, can move and are convenient to carry; the measuring instrument and the measuring device are simple to operate, and conversion between voltage measurement and line measurement can be realized only by switching the first switch and the second switch.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a conventional pointer-type voltmeter in a front view;
FIG. 2 is a schematic side view of the pointer voltmeter shown in FIG. 1;
FIG. 3 is an equivalent schematic diagram of a voltage measurement circuit inside the pointer voltmeter shown in FIG. 1;
fig. 4 is a schematic circuit diagram of a measuring instrument according to an embodiment of the present invention;
fig. 5 is a schematic front structural view of a measuring instrument according to an embodiment of the present invention;
fig. 6 is a schematic side view of a measuring instrument according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a measurement apparatus according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
The embodiment provides a measuring instrument, and fig. 4 is a schematic circuit structure diagram of the measuring instrument, and the measuring instrument includes a pointer voltmeter, a first switch K1, a second switch K2, and a line on-off measuring circuit. As shown in fig. 1 to 3, in the present embodiment, two ends of the voltage measuring circuit 31 are not directly connected to the positive terminal 21 and the negative terminal 22, but are connected to the positive terminal 21 and the negative terminal 22 through the first switch K1 and the second switch K2, respectively.
Specifically, the first switch K1 and the second switch K2 are both single-pole double-throw switches, for example, the first switch K1 and the second switch K2 may be micro switches. One input end of the first switch K1 is connected with one end of the on-off line detection circuit, the other input end of the first switch K1 is connected with one end of the voltage measurement circuit 31, and the output end of the first switch K1 is connected with the positive terminal 21; one input end of the second switch K2 is connected to the other end of the on-off line detection circuit, the other input end of the second switch K2 is connected to the other end of the voltage measurement circuit 31, and the output end of the second switch K2 is connected to the negative terminal 22.
In the measuring instrument provided by this embodiment, the first switch, the second switch and the line on-off measuring circuit are additionally arranged on the basis of the pointer type voltmeter, when one input end of the first switch is controlled to be conducted with the output end of the first switch and one input end of the second switch is controlled to be conducted with the output end of the second switch, two ends of the line on-off detecting circuit are respectively communicated with the positive terminal 21 and the negative terminal 22, and at this time, the measuring instrument can measure the quality of electronic devices such as a diode and a triode and the on-off of a line; when the other input end of the first switch and the output end of the first switch are controlled to be conducted and the other input end of the second switch and the output end of the second switch are controlled to be conducted, two ends of the voltage measuring circuit 31 are respectively communicated with the positive wiring column 21 and the negative wiring column 22, and at the moment, the measuring instrument can measure the voltage of the circuit to be measured. In the embodiment, the pointer type voltmeter is transformed into an instrument which can measure the voltage of a tested circuit and the on-off of a measuring circuit, so that the old voltmeter is reused, and the reuse cost is low; the measuring instrument and the measuring device are small in structure, can move and are convenient to carry; the measuring instrument and the measuring device are simple to operate, and conversion between voltage measurement and line measurement can be realized by only controlling the first switch K1 and the second switch K2.
In the present embodiment, the on-off line measuring circuit includes a voltage source U1, a light emitting unit 41, and a sound emitting unit 42. The positive electrode of the voltage source U1 is used as one end of the circuit on-off measuring circuit, the negative electrode of the voltage source U1 is connected with one end of the light-emitting unit 41 and one end of the sound-emitting unit 42, and the other end of the light-emitting unit 41 is connected with the other end of the sound-emitting unit 42 and used as the other end of the circuit on-off measuring circuit. When the tested line is a channel, the voltage source U1 supplies power to the light-emitting unit 41 and the sound-emitting unit 42, so that the light-emitting unit 41 gives out a light prompt and the sound-emitting unit 42 gives out a sound prompt.
The light emitting unit 41 includes a light emitting diode D1 and a first resistor R1. One end of the first resistor R1 is used as one end of the light emitting unit 41, the other end of the first resistor R1 is connected to the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is used as the other end of the light emitting unit 41. Further, the light emitting unit 41 may further include a first fuse connected in series with the light emitting diode D1 and the first resistor R1.
The sounding unit 42 comprises a second resistor R2, a third resistor R3, a capacitor C1, an NPN triode Q1, a buzzer B1 and an anti-reflection diode D2. One end of the second resistor R2 is used as one end of the sounding unit 42, the other end of the second resistor R2 is connected with one end of the third resistor R3, one end of the capacitor C1 and the base of the NPN triode Q1, the other end of the third resistor R3, the other end of the capacitor C1 and the emitter of the NPN triode Q1 are grounded, the collector of the NPN triode Q1 is connected with one end of the buzzer B1, the other end of the buzzer B1 is connected with the cathode of the anti-reflection diode D2, and the anode of the anti-reflection diode D2 is used as the other end of the sounding unit 42.
Further, the on-off line measuring circuit may further include a second fuse F2 connected in series with the voltage source U1. The measuring instrument may further include a third fuse F3 connected in series between the other input terminal of the first switch K1 and one terminal of the voltage measuring circuit 31 and/or a fourth fuse F4 connected in series between the other input terminal of the second switch K2 and the other terminal of the voltage measuring circuit 31. By providing a fuse, the reliability of the measuring instrument can be increased.
When the measuring instrument is used for measuring, the positive wiring column 21 can be connected with one end of a circuit to be measured through a lead, and the negative wiring column 22 is connected with the other end of the circuit to be measured through a lead. For convenience of measurement, the measuring instrument may further include a red pen connected to the positive terminal post 21 and a black pen connected to the negative terminal post 22. Through setting up red table pen with black table pen, needn't carry out dismouting wire when measuring again.
In the measurement using the measurement instrument, since it is necessary to observe whether the light emitting diode D1 emits light or not and control the first switch K1 and the second switch K2, the light emitting diode D1, the control terminal of the first switch K1, and the control terminal of the second switch K2 may be embedded in a housing of the pointer type voltmeter, and other components of the on-off line measurement circuit may be disposed inside the pointer type voltmeter. For example, the light emitting diode D1 may be embedded in a display panel of the pointer voltmeter as shown in fig. 5, and the control terminal of the first switch K1 and the control terminal of the second switch K2 may be embedded in a side surface of the pointer voltmeter as shown in fig. 6. Of course, the positions of the led D1, the control terminal of the first switch K1, and the control terminal of the second switch K2 are not limited to those shown in fig. 5 and 6, as long as the led D1 can be observed to emit light and the first switch K1 and the second switch K2 can be controlled, which is not limited in this embodiment.
Example 2
In order to conveniently carry the measuring instrument provided in embodiment 1, this embodiment provides a measuring apparatus. Fig. 7 is a schematic structural diagram of the measuring device, which includes a portable bag 71 and the measuring instrument provided in embodiment 1, and the measuring instrument is disposed in the portable bag 71. Further, the measuring instrument may be embedded in the installation space by providing the installation space matched with the measuring instrument in the carry bag 71. Of course, the measuring instrument may be fixed in the portable bag by other means, for example, by being fixed in the portable bag by an adhesive means, which is not limited in this embodiment.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A measuring instrument is characterized by comprising a pointer type voltmeter, a first switch, a second switch and a line on-off measuring circuit, wherein the pointer type voltmeter comprises a voltage measuring circuit, a positive wiring column and a negative wiring column;
one input end of the first switch is connected with one end of the line on-off detection circuit, the other input end of the first switch is connected with one end of the voltage measurement circuit, and the output end of the first switch is connected with the positive wiring column;
one input end of the second switch is connected with the other end of the line on-off detection circuit, the other input end of the second switch is connected with the other end of the voltage measurement circuit, and the output end of the second switch is connected with the negative wiring terminal.
2. The measuring instrument according to claim 1, wherein the line on-off measuring circuit comprises a voltage source, a light emitting unit, and a sound emitting unit;
the positive pole of the voltage source is used as one end of the circuit on-off measuring circuit, the negative pole of the voltage source is connected with one end of the light-emitting unit and one end of the sound-generating unit, and the other end of the light-emitting unit is connected with the other end of the sound-generating unit and used as the other end of the circuit on-off measuring circuit.
3. The measuring instrument according to claim 2, wherein the light emitting unit includes a light emitting diode and a first resistor;
one end of the first resistor is used as one end of the light emitting unit, the other end of the first resistor is connected with the anode of the light emitting diode, and the cathode of the light emitting diode is used as the other end of the light emitting unit.
4. The measuring instrument according to claim 3, wherein the light emitting unit further comprises a first fuse connected in series with the light emitting diode and the first resistor.
5. The measuring instrument according to claim 2, wherein the sound emitting unit includes a second resistor, a third resistor, a capacitor, an NPN transistor, a buzzer, and an anti-reverse diode;
one end of the second resistor serves as one end of the sounding unit, the other end of the second resistor is connected with one end of the third resistor, one end of the capacitor and the base electrode of the NPN triode, the other end of the third resistor, the other end of the capacitor and the emitting electrode of the NPN triode are grounded, the collector electrode of the NPN triode is connected with one end of the buzzer, the other end of the buzzer is connected with the cathode of the anti-reflection diode, and the anode of the anti-reflection diode serves as the other end of the sounding unit.
6. The meter of claim 2, wherein the on-off line measurement circuit further comprises a second fuse in series with the voltage source.
7. The measuring instrument according to claim 1, further comprising a third fuse connected in series between the other input terminal of the first switch and one terminal of the voltage measuring circuit and/or a fourth fuse connected in series between the other input terminal of the second switch and the other terminal of the voltage measuring circuit.
8. The meter of claim 1, further comprising a red stylus connected to the positive terminal post and a black stylus connected to the negative terminal post.
9. The measuring instrument according to claim 1, wherein the first switch and the second switch are micro switches.
10. A measuring device comprising a carrying case and a measuring instrument according to any one of claims 1 to 9, said measuring instrument being disposed in said carrying case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921497561.1U CN210863859U (en) | 2019-09-10 | 2019-09-10 | Measuring instrument and measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921497561.1U CN210863859U (en) | 2019-09-10 | 2019-09-10 | Measuring instrument and measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210863859U true CN210863859U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921497561.1U Active CN210863859U (en) | 2019-09-10 | 2019-09-10 | Measuring instrument and measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210863859U (en) |
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2019
- 2019-09-10 CN CN201921497561.1U patent/CN210863859U/en active Active
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