Digital multimeter capable of supporting TVS (Transient Voltage Suppressor) measurement
By adding boost circuit, constant current source and on-off isolation circuit to the digital multimeter, the problem that existing multimeters cannot efficiently measure TVS diodes, and efficient TVS tube measurement without additional circuits is achieved.
Patent Information
- Application Number
- CN202422368028.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-27
AI Technical Summary
Existing digital multimeters cannot efficiently measure TVS diodes, resulting in the need of engineers to build additional special circuits, which is time-consuming and labor-intensive.
Add boost circuit, constant current source and on-off isolation circuit to the digital multimeter, and perform TVS tube measurements through positive and negative meter pens, retaining the conventional measurement function.
It realizes efficient measurement of TVS tubes without additional circuit building, improving measurement efficiency.
Smart Images
Figure CN223217564U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of digital multimeters, in particular to a digital multimeter capable of supporting TVS measurement. Background Art
[0002] Conventional digital multimeters can only measure standard diodes and LEDs, but cannot measure most TVS diodes. This forces engineers to build specialized circuits to measure TVS diodes, which is cumbersome, time-consuming, and labor-intensive, resulting in low measurement efficiency. Therefore, current digital multimeters can no longer fully meet the application needs of engineers. Utility Model Content
[0003] The purpose of the utility model is to provide a digital multimeter that can support TVS measurement. It retains the conventional measurement functions of current multimeters and adds a TVS tube measurement part on the basis of existing multimeters, thereby increasing the functionality of the multimeter. When measuring TVS tubes, there is no need to build an additional dedicated measurement circuit, which saves time and effort and improves measurement efficiency.
[0004] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:
[0005] A digital multimeter capable of supporting TVS measurement includes a multimeter body and a switch circuit, wherein the switch circuit is a conventional measurement part of the multimeter body or is independent. The multimeter body also includes a boost circuit connected to the switch circuit, the boost circuit is connected in series with a constant current source, and the constant current source is connected in series with an on-off isolation circuit. The multimeter body is also connected to positive and negative test leads, and TVS tubes are measured via the positive and negative test leads.
[0006] Furthermore, the boost circuit provides energy for the TVS tube.
[0007] Furthermore, the constant current source is used to control and limit the current passing through the TVS tube.
[0008] Furthermore, the on-off isolation circuit is used to isolate the influence of the TVS tube measurement circuit on normal voltage measurement.
[0009] Furthermore, the on-off isolation circuit is constructed by a relay, an analog switch, a MOS tube, or a triode.
[0010] Compared with the prior art, the beneficial effects of the present invention are:
[0011] This patent retains the conventional measurement functions of the current multimeter, and adds a boost circuit, a constant current source, and an on-off isolation circuit to the existing multimeter as the measurement part of the TVS tube, which increases the functionality of the multimeter. When measuring the TVS tube, there is no need to build an additional special measurement circuit, which saves time and effort and improves measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Attachment Figure 1 It is a working principle diagram of the utility model.
[0013] Reference numerals shown in the accompanying drawings:
[0014] 1. Multimeter body; 2. Switch circuit; 3. Boost circuit; 4. Constant current source; 5. On / off isolation circuit; 6. Positive and negative test leads. DETAILED DESCRIPTION
[0015] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that these equivalent forms also fall within the scope defined in this application.
[0016] Embodiment: A digital multimeter that can support TVS measurement includes a multimeter body 1 and a switching circuit 2. The switching circuit can be a conventional measurement part of the multimeter body 1 or an independent one. It also includes a boost circuit 3 connected to the switching circuit 2. The boost circuit 3 can be a charge pump boost or an inductive boost. The boost circuit 3 provides energy for the TVS tube. The boost circuit 3 is connected in series with a constant current source 4. The constant current source 4 is used to control and limit the current passing through the TVS tube. The constant current source 4 is connected in series with an on-off isolation circuit 5. The on-off isolation circuit 5 can be constructed using an analog switch, a dual MOS switch, a relay, or a triode. The on-off isolation circuit 5 is used to isolate the influence of the TVS tube measurement circuit on normal voltage measurement. The multimeter body 1 is also connected to positive and negative test leads 6, and the TVS tube is measured through the positive and negative test leads 6.
[0017] This patent retains the conventional measurement functions of the current multimeter, and adds a boost circuit 3, a constant current source 4, and an on-off isolation circuit 5 to the existing multimeter as the measurement part of the TVS tube, thereby increasing the functionality of the multimeter. When measuring the TVS tube, there is no need to build an additional special measurement circuit, which saves time and effort and improves measurement efficiency.
Claims
1. A digital multimeter capable of supporting TVS measurement, comprising a multimeter body (1) and a switch circuit (2), wherein the switch circuit (2) is a conventional measurement part of the multimeter body (1) or is independent thereof, and is characterized in that: The multimeter also includes a boost circuit (3) connected to the switch circuit (2), the boost circuit (3) is connected in series with a constant current source (4), and the constant current source (4) is connected in series with an on-off isolation circuit (5). The multimeter body (1) is also connected with positive and negative test leads (6), and the TVS tube is measured via the positive and negative test leads (6).
2. A digital multimeter capable of supporting TVS measurement according to claim 1, characterized in that: The boost circuit (3) provides energy for the TVS tube.
3. A digital multimeter capable of supporting TVS measurement according to claim 1, characterized in that: The constant current source (4) is used to control and limit the current passing through the TVS tube.
4. A digital multimeter capable of supporting TVS measurement according to claim 1, characterized in that: The on-off isolation circuit (5) is used to isolate the influence of the TVS tube measurement circuit on normal voltage measurement.
5. A digital multimeter capable of supporting TVS measurement according to claim 4, characterized in that: The on-off isolation circuit (5) is constructed by a relay, an analog switch, a MOS tube, or a triode.