Resistance switch matrix

Abstract

The utility model discloses a resistor switch matrix which comprises a plurality of resistor groups which are sequentially connected in series, each resistor group comprises a first resistor, a second resistor, a third resistor and a fourth resistor which are sequentially connected in series, and a control switch is connected between every two resistors in parallel. The resistance switch matrix further comprises a control system used for controlling the control switches to be turned on and turned off, and the control system is used for controlling the control switches to be turned on and turned off so as to output different resistance values. According to the utility model, through a programmable resistance switch matrix, different resistance value output effects can be freely and flexibly realized, NTC and PTC can be simulated to show different temperatures, and different insulation resistance values can be simulated.

Description

Technical Field

[0001] This utility model relates to the field of thermistor resistance testing technology, and in particular to a resistance switch matrix. Background Technology

[0002] Currently, product testing typically uses actual NTC or PTC sensors. However, determining whether the product can be properly triggered at different temperatures is quite laborious and requires temperature chamber control. Furthermore, insulation resistance testing is achieved by manually changing the resistor values ​​one by one. Utility Model Content

[0003] The main purpose of this invention is to propose a resistor switch matrix, which aims to achieve different resistance value output effects freely and flexibly through a programmable resistor switch matrix. It can simulate NTC and PTC to show different temperatures, and can also simulate different insulation resistance values.

[0004] To achieve the above objectives, this utility model provides a resistor switch matrix, comprising: a plurality of resistor groups connected in series, wherein each resistor group includes a first resistor, a second resistor, a third resistor and a fourth resistor connected in series, and a control switch connected in parallel between each resistor; the resistor switch matrix further includes a control system for controlling the opening and closing of the control switch, the control system being used to control the opening and closing of the control switch to output different resistance values.

[0005] The advanced technical solution of this utility model is that the several resistor groups connected in series are adjusted in 1-ohm increments.

[0006] The improved technical solution of this utility model is that the resistance values ​​of the first resistor, the second resistor, the third resistor, and the fourth resistor in the first resistor group of the plurality of resistor groups are 1Ω, 2Ω, 2Ω, and 5Ω, respectively.

[0007] The improved technical solution of this utility model is that the resistance values ​​of the first, second, third, and fourth resistors in the latter group of the plurality of resistor groups are ten times the resistance values ​​of the first, second, third, and fourth resistors in the former group of resistor groups, respectively.

[0008] The beneficial effects of this novel resistor switch matrix are:

[0009] 1. High precision: This utility model adopts a low internal resistance switch and a high precision resistor, which can ensure high precision output;

[0010] 2. High efficiency: This utility model can programmably output different resistance values;

[0011] 3. High resolution: This utility model can realize the adjustment step of a single mold. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the circuit structure of a preferred embodiment of the resistor switch matrix of this utility model.

[0014] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This invention proposes a resistor switch matrix, such as... Figure 1 As shown, a preferred embodiment of the resistor switch matrix of this utility model includes several resistor groups connected in series. Each resistor group includes a first resistor, a second resistor, a third resistor, and a fourth resistor connected in series. A control switch is connected in parallel between each resistor. The resistor switch matrix also includes a control system for controlling the opening and closing of the control switch to output different resistance values.

[0017] In this embodiment, the series of resistor groups are adjusted in 1-ohm increments.

[0018] As one implementation scheme, in this embodiment, the resistance values ​​of the first resistor, the second resistor, the third resistor, and the fourth resistor in the first resistor group are 1Ω, 2Ω, 2Ω, and 5Ω, respectively.

[0019] The resistance values ​​of the first, second, third, and fourth resistors in the latter group of the plurality of resistor groups are ten times the resistance values ​​of the first, second, third, and fourth resistors in the former group of resistor groups, respectively.

[0020] The following combination Figure 1The structure and working principle of the resistor switch matrix of this utility model are described.

[0021] like Figure 1 As shown, resistors of various amperes, including 1Ω, 2Ω, 2Ω, 5Ω, 10Ω, 20Ω, 20Ω, 50Ω, 100Ω, 200Ω, 200Ω, 500Ω, 1kΩ, 2kΩ, 2kΩ, 5kΩ, 10kΩ, 20kΩ, 20kΩ, 50kΩ, 100kΩ, 200kΩ, 200kΩ, 500kΩ, 1MΩ, 2MΩ, 2MΩ, 5MΩ, 10MΩ, 20MΩ, 20MΩ, 50MΩ, and even more, are connected in series. A control switch is connected in parallel next to each resistor. The control switch determines whether the resistor is connected in series or bypassed to zero.

[0022] When only one 1Ω switch is open and the other switches are closed, the overall output is 1Ω. When only one 2Ω switch is open and the other switches are closed, the overall output is 2Ω. When only one 1Ω and one 2Ω switch are open and the other switches are closed, the overall output is 3Ω. When only two 2Ω switches are open and the other switches are closed, the overall output is 4Ω. When only one 5Ω switch is open and the other switches are closed, the overall output is 5Ω. When only one 1Ω and one 5Ω switch are open and the other switches are closed, the overall output is 6Ω. When only one 2Ω and one 5Ω switch are open and the other switches are closed, the overall output is 7Ω. When only one 2Ω, one 1Ω, and one 5Ω switch are open and the other switches are closed, the overall output is 8Ω. When only two 2Ω and one 5Ω switches are open and the other switches are closed, the overall output is 9Ω. When only one 10Ω switch is open and the other switches are closed, the overall output is 10Ω. Therefore, resistors of any value can be created using resistors of the 1, 2, 2, and 5Ω series.

[0023] Similarly, the values ​​on the 10Ω bit and other bits, or even the 100MΩ bit, can be edited.

[0024] This embodiment allows setting any resistance value with a minimum resolution of 1Ω.

[0025] If the application is to simulate insulation resistance, simply edit the required resistance value. If the application is to simulate temperature, you can refer to the NTC or PTC manual to find the resistance curves corresponding to different temperatures, import the curves into this device, and then directly input the temperature value to output the corresponding resistance value.

[0026] This invention relates to a programmable resistor implementation method that can simulate the resistance values ​​of NTC and PTC at different temperatures, and is used to simulate product testing using NTC or PTC as temperature sensors. It can also be used for testing equipment for detecting insulation resistance.

[0027] The beneficial effects of this novel resistor switch matrix are:

[0028] 1. High precision: This utility model adopts a low internal resistance switch and a high precision resistor, which can ensure high precision output;

[0029] 2. High efficiency: This utility model can programmably output different resistance values;

[0030] 3. High resolution: This utility model can realize the adjustment step of a single mold.

[0031] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A resistor switch matrix, characterized in that, include: A series of resistor groups connected in series, wherein each resistor group includes a first resistor, a second resistor, a third resistor and a fourth resistor connected in series, and a control switch is connected in parallel between each resistor. The resistor switch matrix also includes a control system for controlling the opening and closing of the control switch to output different resistance values.

2. The resistor switch matrix according to claim 1, characterized in that, The series of resistors connected in series are adjusted in 1-ohm increments.

3. The resistor switch matrix according to claim 2, characterized in that, The resistance values ​​of the first, second, third, and fourth resistors in the first resistor group are 1Ω, 2Ω, 2Ω, and 5Ω, respectively.

4. The resistor switch matrix according to claim 3, characterized in that, The resistance values ​​of the first, second, third, and fourth resistors in the latter group of the plurality of resistor groups are ten times the resistance values ​​of the first, second, third, and fourth resistors in the former group of resistor groups, respectively.

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