CN110221158B - Flat cable detection circuit, system and method - Google Patents
Flat cable detection circuit, system and method Download PDFInfo
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- CN110221158B CN110221158B CN201910575105.2A CN201910575105A CN110221158B CN 110221158 B CN110221158 B CN 110221158B CN 201910575105 A CN201910575105 A CN 201910575105A CN 110221158 B CN110221158 B CN 110221158B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The invention discloses a flat cable detection circuit, a system and a method, wherein the flat cable detection circuit comprises a first voltage comparison module, a first voltage reduction module, a first indicator lamp, a second voltage comparison module, a second voltage reduction module, a second indicator lamp, a third voltage comparison module, a third voltage reduction module and an electronic switch; the flat cable detection system consists of a plurality of flat cable detection circuits; the flat cable detection method uses the flat cable detection circuit to detect the first electric wire and the second electric wire, when the first indicator lamp and the second indicator lamp emit light, the wire sequence of the first electric wire and the second electric wire is judged to be correct, otherwise, the wire sequence of the first electric wire and the second electric wire is judged to be incorrect. The invention can realize the detection of the wire arrangement sequence, especially the error of the exchange of two adjacent wires in the wire arrangement, only by a simple combined circuit, and has the advantages of low production cost, simple use, higher stability and the like. The invention is widely applied to the technical field of electronic circuits.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a flat cable detection circuit, a flat cable detection system and a flat cable detection method.
Background
The flat cable is a wire harness composed of a plurality of wires, and is widely applied to the fields of electronic products, industrial control equipment and the like. The flat cable can be formed by combining a plurality of wires with independent insulating sheaths in a bonding, packaging or integral processing mode, and can also be displayed in a printed circuit mode and the like. Terminals can be pre-installed at both ends of the flat cable for easy connection. Each wire in the flat cable has a different electrical definition, and thus the order of each wire is required. In the production process of the flat cable, a wire sequence error is easy to occur when the terminal is assembled, and especially, the adjacent two wires are exchanged in sequence most commonly. The electrical performance of the flat cable where the wire sequence error occurs will be degraded or even unusable.
The existing flat cable sequence detection technology needs to use a singlechip and a matched program to generate a specific signal so as to identify the flat cable sequence, and has the defects of high production cost, complex use, poor stability and the like.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a flat cable detection circuit, a system and a method.
In one aspect, an embodiment of the present invention includes a flat cable detection circuit, where the flat cable includes a first wire and a second wire, and the flat cable detection circuit includes a first voltage comparison module, a first step-down module, a first indicator light, a second voltage comparison module, a second step-down module, a second indicator light, a third voltage comparison module, a third step-down module, and an electronic switch;
The first voltage comparison module is connected to a first reference voltage through a first voltage reduction module, the output end of the first voltage comparison module is connected with the first indicator lamp, and the input end of the first voltage comparison module is used for connecting a first electric wire;
the second voltage comparison module is connected to a second reference voltage lower than the first reference voltage through a second voltage reduction module, the output end of the second voltage comparison module is connected with the second indicator lamp, and the input end of the second voltage comparison module is used for connecting a second electric wire;
The third voltage comparison module is connected to the first reference voltage through a third voltage reduction module, the output end of the third voltage comparison module is connected with the control end of the electronic switch, the input end of the electronic switch is connected to the first reference voltage, the output end of the electronic switch is connected to the second reference voltage, and the electronic switch is used for loading the first reference voltage to the second voltage comparison module when being conducted.
Further, the first voltage comparison module comprises a first operational amplifier, a third resistor, a thirty-first resistor, a twenty-second resistor and a twenty-sixth resistor, and the first voltage reduction module comprises a seventh resistor, an eighth resistor and a sixth capacitor;
one end of the third resistor is connected with the non-inverting input end of the first operational amplifier, the other end of the third resistor is grounded through the thirty-th resistor, and the other end of the third resistor is used for being connected with a first electric wire;
The inverting input end of the first operational amplifier is connected to the first reference voltage through the seventh resistor, and the inverting input end of the first operational amplifier is grounded through a parallel circuit formed by the eighth resistor and the sixth capacitor;
The output end of the first operational amplifier is grounded through the twenty-sixth resistor, and the output end of the first operational amplifier is connected with the first indicator lamp through the twenty-second resistor.
Further, the second voltage comparison module comprises a second operational amplifier, a fourth resistor, a thirty-first resistor, a twenty-third resistor and a twenty-seventh resistor, and the second voltage reduction module comprises a ninth resistor, a tenth resistor and a seventh capacitor;
one end of the fourth resistor is connected with the non-inverting input end of the second operational amplifier, the other end of the fourth resistor is grounded through the thirty-first resistor, and the other end of the fourth resistor is used for being connected with a second electric wire;
the inverting input end of the second operational amplifier is connected to the second reference voltage through the ninth resistor, and is grounded through a parallel circuit formed by the tenth resistor and the seventh capacitor;
The output end of the second operational amplifier is grounded through the twenty-seventh resistor, and the output end of the second operational amplifier is connected with the second indicator lamp through the twenty-third resistor.
Further, the third voltage comparison module comprises a third operational amplifier, a sixteenth resistor and a seventeenth resistor; the third voltage reduction module comprises a fifteenth resistor; the electronic switch comprises a field effect transistor;
The inverting input end of the third operational amplifier is connected to the first reference voltage through the fifteenth resistor, the non-inverting input end of the third operational amplifier is used for being connected with a second electric wire, the output end of the third operational amplifier is connected with the grid electrode of the field effect transistor through the sixteenth resistor, and the output end of the third operational amplifier is grounded through the seventeenth resistor;
the drain electrode of the field effect transistor is connected to the first reference voltage, and the source electrode of the field effect transistor is connected with the inverting input end of the second operational amplifier.
Further, the flat cable detection circuit further comprises a flat cable socket; the flat cable socket is provided with a first port and a second port, the first port is connected with the input end of the first voltage comparison module, and the second port is connected with the input end of the second voltage comparison module; the first port is used for connecting a first electric wire, and the second port is used for connecting a second electric wire.
On the other hand, the embodiment of the invention also comprises a flat cable detection system which consists of a plurality of flat cable detection circuits according to the embodiment of the invention.
Further, the first reference voltage corresponding to each flat cable detection circuit is reduced in sequence, and the second reference voltage corresponding to each flat cable detection circuit is reduced in sequence.
On the other hand, the embodiment of the invention further comprises a flat cable detection method, wherein the flat cable comprises a first electric wire and a second electric wire, and the flat cable detection method uses the flat cable detection circuit according to the embodiment of the invention to execute the following steps:
Connecting one end of a first wire to the input end of the first voltage comparison module, and connecting one end of a second wire to the input end of the second voltage comparison module;
Applying a first test voltage having the same magnitude as the first reference voltage to the other end of the first wire, and applying a second test voltage having the same magnitude as the second reference voltage to the other end of the second wire;
when the first indicator light and the second indicator light emit light, the line sequence of the first electric wire and the line sequence of the second electric wire are judged to be correct, otherwise, the line sequence of the first electric wire and the line sequence of the second electric wire are judged to be incorrect.
The beneficial effects of the invention are as follows: the voltage carried by the electric wire is compared with the preset reference voltage by using the first voltage comparison module and the second voltage comparison module, and the level representing the comparison result is displayed by the indicator lamp.
Drawings
FIG. 1 is a block diagram of a flat cable detection circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a flat cable detection circuit according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for detecting a flat cable in an embodiment of the invention.
Detailed Description
Example 1
The embodiment comprises a flat cable detection circuit, wherein a flat cable for detection comprises a first electric wire and a second electric wire. As shown in fig. 1, the flat cable detection circuit includes:
The device comprises a first voltage comparison module, a first voltage reduction module and a first indicator lamp; the first voltage comparison module is connected to a first reference voltage through a first voltage reduction module, the output end of the first voltage comparison module is connected with the first indicator lamp, and the input end of the first voltage comparison module is used for connecting a first electric wire;
The second voltage comparison module, the second voltage reduction module and the second indicator lamp; the second voltage comparison module is connected to a second reference voltage lower than the first reference voltage through a second voltage reduction module, the output end of the second voltage comparison module is connected with the second indicator lamp, and the input end of the second voltage comparison module is used for connecting a second electric wire;
The device comprises a third voltage comparison module, a third voltage reduction module and an electronic switch; the third voltage comparison module is connected to the first reference voltage through a third voltage reduction module, the output end of the third voltage comparison module is connected with the control end of the electronic switch, the input end of the electronic switch is connected to the first reference voltage, the output end of the electronic switch is connected to the second reference voltage, and the electronic switch is used for loading the first reference voltage to the second voltage comparison module when being conducted.
Referring to the circuit shown in fig. 1, the first reference voltage and the second reference voltage may be generated using a regulated power supply, the first reference voltage being higher than the second reference voltage. The voltage difference between the first reference voltage and the second reference voltage should be large enough, and in this embodiment, the first reference voltage may be set to 12V, and the second reference voltage may be set to 9V.
The first voltage reducing module reduces the first reference voltage and loads the first reference voltage to the first comparing module, so that the first voltage comparing module obtains a reference voltage which is slightly lower than 12V, for example, 11.8V. The second voltage reducing module reduces the second reference voltage and loads the second reference voltage to the second comparing module, so that the first voltage comparing module obtains a reference voltage which is slightly lower than 9V, for example, 8.8V.
The first voltage comparison module is used for comparing the voltage loaded on the first electric wire with 11.8V, when the voltage loaded on the first electric wire is greater than 11.8V, the first voltage comparison module outputs a level signal to drive the first indicator lamp to emit light, otherwise, the first voltage comparison module does not output a level signal, and the first indicator lamp does not emit light. The second voltage comparison module is used for comparing the voltage loaded on the second electric wire with 8.8V, when the voltage loaded on the second electric wire is greater than 8.8V, the second voltage comparison module outputs a level signal to drive the second indicator lamp to emit light, otherwise, the second voltage comparison module does not output a level signal, and the second indicator lamp does not emit light.
When the flat cable detection circuit in the present embodiment is used, the correct wire sequence is defined first. For example, in the present embodiment, the first electric wire is connected to the 12V voltage, the second electric wire is connected to the 9V voltage, and the correct wire sequence is defined, and then the incorrect wire sequence refers to a case other than the correct wire sequence, for example, the first electric wire is connected to the 9V voltage, the second electric wire is connected to the 9V voltage, or at least one of the first electric wire and the second electric wire is zero in voltage to ground.
When the line sequence is correct, the voltage applied by the first electric wire received by the first voltage comparison module is 12V, the first voltage comparison module compares the 12V with the first reference voltage 11.8V which is reduced by the first voltage reduction module, and the first voltage comparison module outputs a level signal to drive the first indicator lamp to emit light because the voltage loaded on the first electric wire is larger than the first reference voltage 11.8V. Meanwhile, the voltage applied by the second electric wire received by the second voltage comparison module is 9V, the second voltage comparison module compares the 9V with the second reference voltage 8.8V which is reduced by the second voltage reduction module, and the second voltage comparison module outputs a level signal to drive the second indicator lamp to emit light because the voltage loaded on the second electric wire is larger than the second reference voltage 8.8V. The first indicator light and the second indicator light emit light at the same time, which indicates that the line sequence formed by the first electric wire and the second electric wire is correct.
When an assembly error occurs, which results in the first and second wires being misconnected with each other at the port of the other, a case occurs in which the voltage applied to the first wire to the first voltage comparing module is 9V and the voltage applied to the second wire to the second voltage comparing module is 12V. At this time, the first voltage comparing module compares the voltage 9V applied by the first electric wire with the first reference voltage 11.8V reduced by the first voltage reducing module, and since the voltage applied on the first electric wire is smaller than the first reference voltage 11.8V, the first voltage comparing module does not output a level signal, and the first indicator light does not emit light. Meanwhile, the second electric wire also applies 12V voltage to the third voltage comparison module, the third voltage comparison module compares the 12V voltage applied by the second electric wire with the 11.8V first reference voltage reduced by the third voltage reduction module, and the output end of the third voltage comparison module outputs a level signal to drive the electronic switch to be conducted, and the electronic switch is conducted to load the first reference voltage 12V to the second voltage comparison module. At this time, the second voltage comparing module compares the voltage applied by the second electric wire with the first reference voltage which is not reduced, and the second electric wire does not apply the voltage which is not greater than the first reference voltage which is not reduced, so that the second voltage comparing module does not output a level signal, and the second indicator light does not emit light. The first indicator light and the second indicator light are not lighted, and the line sequence formed by the first electric wire and the second electric wire is wrong.
The flat cable detection circuit has the advantages that the flat cable sequence, particularly the error of the adjacent two wires in the flat cable, can be detected only by a simple combined circuit, so that complex devices such as a singlechip are avoided, a matched program is not required to be developed, and the flat cable detection circuit has the advantages of low production cost, simplicity in use, higher stability and the like.
Further as a preferred embodiment, referring to fig. 2, the first voltage comparing module includes a first operational amplifier U1, a third resistor R3, a thirty-second resistor R30, a twenty-second resistor R22, and a twenty-sixth resistor R26, and the first voltage dropping module includes a seventh resistor R7, an eighth resistor R8, and a sixth capacitor C6;
one end of the third resistor R3 is connected with the non-inverting input end of the first operational amplifier U1, the other end of the third resistor R3 is grounded through the thirty-first resistor R30, and the other end of the third resistor R3 is used for being connected with a first electric wire;
The inverting input end of the first operational amplifier U1 is connected to the first reference voltage through the seventh resistor R7, and the inverting input end of the first operational amplifier U1 is grounded through a parallel circuit formed by the eighth resistor R8 and the sixth capacitor C6;
The output end of the first operational amplifier U1 is grounded through the twenty-sixth resistor R26, and the output end of the first operational amplifier U1 is connected with the first indicator light LED1 through the twenty-second resistor R22.
Referring to a circuit shown in a dashed box labeled as a "first voltage comparison module" in fig. 2, the first voltage comparison module is composed of a first operational amplifier U1, a third resistor R3, a thirty-second resistor R30, a twenty-second resistor R22 and a twenty-sixth resistor R26, wherein the third resistor R3 and the thirty-second resistor R30 form a bias circuit, and the twenty-second resistor R22 and the twenty-sixth resistor R26 are used for limiting voltage and current of a driving signal output by the first operational amplifier U1. Referring to a circuit shown in a broken line frame labeled "first step-down module" in fig. 2, the first step-down module is a voltage dividing circuit composed of a seventh resistor R7, an eighth resistor R8, and a sixth capacitor C6, which can divide a first reference voltage, and by adjusting the values of the seventh resistor R7 and the eighth resistor R8, a voltage slightly lower than the first reference voltage can be obtained and applied to the first voltage comparison module.
Further as a preferred embodiment, referring to fig. 2, the second voltage comparing module includes a second operational amplifier U2, a fourth resistor R4, a thirty-first resistor R31, a twenty-third resistor R23, and a twenty-seventh resistor R27, and the second voltage dropping module includes a ninth resistor R9, a tenth resistor R10, and a seventh capacitor C7;
One end of the fourth resistor R4 is connected with the non-inverting input end of the second operational amplifier U2, the other end of the fourth resistor R4 is grounded through the thirty-first resistor R31, and the other end of the fourth resistor R4 is used for being connected with a second electric wire;
the inverting input end of the second operational amplifier U2 is connected to the second reference voltage through the ninth resistor R9, and the inverting input end of the second operational amplifier U2 is grounded through a parallel circuit formed by the tenth resistor R10 and the seventh capacitor C7;
The output end of the second operational amplifier U2 is grounded through the twenty-seventh resistor R27, and the output end of the second operational amplifier U2 is connected with the second indicator light LED2 through the twenty-third resistor R23.
Referring to a circuit shown in a broken line box labeled as a "second voltage comparison module" in fig. 2, the second voltage comparison module includes a second operational amplifier U2, a fourth resistor R4, a thirty-first resistor R31, a twenty-third resistor R23, and a twenty-seventh resistor R27, where the fourth resistor R4 and the thirty-first resistor R31 form a bias circuit, and the twenty-third resistor R23 and the twenty-seventh resistor R27 are used for limiting voltage and current of a driving signal output by the second operational amplifier U2. Referring to a circuit shown in a broken line frame labeled "second step-down module" in fig. 2, the first step-down module is a voltage dividing circuit composed of a ninth resistor R9, a tenth resistor R10, and a seventh capacitor C7, which can divide the second reference voltage, and by adjusting the values of the ninth resistor R9 and the tenth resistor R10, a voltage slightly lower than the second reference voltage can be obtained and applied to the second voltage comparison module.
Further as a preferred embodiment, referring to fig. 2, the third voltage comparing module includes a third operational amplifier U3, a sixteenth resistor R16, and a seventeenth resistor R17; the third voltage reduction module comprises a fifteenth resistor R15; the electronic switch comprises a field effect transistor Q1;
The inverting input end of the third operational amplifier U3 is connected to the first reference voltage through the fifteenth resistor R15, the non-inverting input end of the third operational amplifier U3 is used for being connected with a second electric wire, the output end of the third operational amplifier U3 is connected with the grid electrode of the field effect transistor Q1 through the sixteenth resistor R16, and the output end of the third operational amplifier U3 is grounded through the seventeenth resistor R17;
the drain electrode of the field effect transistor Q1 is connected to the first reference voltage, and the source electrode of the field effect transistor Q1 is connected to the inverting input end of the second operational amplifier U2.
Referring to the circuit shown in the broken line box labeled "third voltage comparison module" in fig. 2, the third voltage comparison module is composed of a third operational amplifier U3, a sixteenth resistor R16 and a seventeenth resistor R17, wherein the sixteenth resistor R16 and the seventeenth resistor R17 can limit the voltage and the current of the driving signal output by the third operational amplifier U3. The third step-down module is composed of a fifteenth resistor R15. In this embodiment, an NMOS transistor is used as the electronic switch, and when the third voltage comparing module outputs a high level to the gate of the NMOS transistor, the NMOS transistor is turned on, and since the on-resistance of the NMOS is very small, there is almost no voltage drop between the source and the drain of the NMOS, so that the first reference voltage can be directly applied to the second voltage comparing module without voltage drop.
Further as a preferred embodiment, referring to fig. 2, the flat cable detection circuit further includes a flat cable socket J2; the flat cable socket J2 is provided with a first port and a second port, the first port is connected with the input end of the first voltage comparison module, and the second port is connected with the input end of the second voltage comparison module; the first port is used for connecting a first electric wire, and the second port is used for connecting a second electric wire.
By arranging the flat cable socket J2, the flat cable detection circuit can be conveniently connected with a flat cable with a port, so that the detection efficiency and accuracy are improved.
Example 2
The present embodiment includes a flat cable detection system composed of a plurality of flat cable detection circuits as described in embodiment 1.
The flat cable detection system in this embodiment includes a plurality of units as shown in fig. 1 or 2, each of which can respectively measure whether or not a pair of wires have been exchanged for a port to be connected due to an assembly error. By using a plurality of wire-arranging detection systems composed of units as shown in fig. 1 or fig. 2, it is possible to detect whether the wire sequence of a wire-arrangement composed of a large number of wires is correct.
Further, as a preferred embodiment, in the flat cable detection system, the first reference voltage corresponding to each flat cable detection circuit is reduced in sequence, and the second reference voltage corresponding to each flat cable detection circuit is reduced in sequence.
For example, when the flat cable detection system includes three units as shown in fig. 1 or 2, the first reference voltage corresponding to the first unit may be set to 12V, the first reference voltage corresponding to the second unit may be set to 7V, and the first reference voltage corresponding to the third unit may be set to 3V; the second reference voltage corresponding to the first cell is set to 9V, the second reference voltage corresponding to the second cell is set to 5V, and the second reference voltage corresponding to the third cell is set to 1V.
Example 3
The present embodiment includes a flat cable detection method, as shown in fig. 3, which performs the following steps using the flat cable detection circuit as described in the embodiment, thereby detecting a flat cable composed of a first electric wire and a second electric wire:
s1, connecting one end of a first electric wire to an input end of a first voltage comparison module, and connecting one end of a second electric wire to an input end of a second voltage comparison module;
S2, applying a first test voltage with the same size as the first reference voltage to the other end of the first wire, and applying a second test voltage with the same size as the second reference voltage to the other end of the second wire;
S3, when the first indicator lamp and the second indicator lamp emit light, judging that the wire sequence of the first electric wire and the wire sequence of the second electric wire are correct, otherwise, judging that the wire sequence of the first electric wire and the wire sequence of the second electric wire are incorrect.
The object of the flat cable detection method may be a flat cable as shown in fig. 2. The first terminal T1 and the second terminal T2 are respectively installed at both ends of the flat cable so that the flat cable can be conveniently installed to the corresponding first socket J1 and second socket J2, thereby achieving electrical connection.
When executing step S1, referring to fig. 2, the second terminal T2 of the flat cable is mounted on the second socket J2, and the second socket J2 is electrically connected to the flat cable detection circuit, so that one end of the first wire is connected to the input end of the first voltage comparison module, and one end of the second wire is connected to the input end of the second voltage comparison module;
In performing step S2, referring to fig. 2, the first terminal T1 of the flat cable is mounted on the first socket J1, and the first socket J1 is electrically connected to the regulated power supply, such that the other end of the first wire is applied with a first test voltage having the same magnitude as the first reference voltage, and a second test voltage having the same magnitude as the second reference voltage is applied to the other end of the second wire.
The judgment result on whether the line sequence is correct can be obtained by observing the first indicator lamp and the second indicator lamp or by automatic control means such as level detection or luminescence detection. The specific rules are as follows: when the first indicator light and the second indicator light emit light, judging that the line sequence of the first electric wire and the second electric wire is correct; and when the first indicator lamp and the second indicator lamp do not emit light, judging that the line sequence of the first electric wire and the second electric wire is incorrect. The principle of this judgment rule is already explained in embodiment 1, and therefore will not be described here.
The flat cable detection method in the present embodiment has the advantages obtained by the flat cable detection circuit in embodiment 1.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly or indirectly fixed or connected to the other feature. Further, the descriptions of the upper, lower, left, right, etc. used in this disclosure are merely with respect to the mutual positional relationship of the various components of this disclosure in the drawings. As used in this disclosure, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this embodiment includes any combination of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could also be termed a second element, and, similarly, a second element could also be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be appreciated that embodiments of the invention may be implemented or realized by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer readable automobile configured with a computer program, where the automobile is so configured that the computer operates in a specific and predefined manner, in accordance with the methods and drawings described in the specific embodiments. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Furthermore, the operations of the processes described in the present embodiments may be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes (or variations and/or combinations thereof) described in this embodiment may be performed under control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications), by hardware, or combinations thereof, that collectively execute on one or more processors. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable computing platform, including, but not limited to, a personal computer, mini-computer, mainframe, workstation, network or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and so forth. Aspects of the invention may be implemented in machine-readable code stored on a non-transitory automobile or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or written to automobile, RAM, ROM, etc., such that it is readable by a programmable computer, which when read by the computer, is operable to configure and operate the computer to perform the processes described herein. Further, the machine readable code, or portions thereof, may be transmitted over a wired or wireless network. When such media includes instructions or programs that, in conjunction with a microprocessor or other data processor, implement the steps described above, the invention described in this embodiment includes these and other different types of non-transitory computer-readable automobiles. The invention also includes the computer itself when programmed according to the methods and techniques of the present invention.
The computer program can be applied to the input data to perform the functions described in this embodiment, thereby converting the input data to generate output data that is stored to the non-volatile memory. The output information may also be applied to one or more output devices such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including specific visual depictions of physical and tangible objects produced on a display.
The present invention is not limited to the above embodiments, but can be modified, equivalent, improved, etc. by the same means to achieve the technical effects of the present invention, which are included in the spirit and principle of the present invention. Various modifications and variations are possible in the technical solution and/or in the embodiments within the scope of the invention.
Claims (8)
1. The flat cable detection circuit comprises a first electric wire and a second electric wire, and is characterized by comprising a first voltage comparison module, a first voltage reduction module, a first indicator lamp, a second voltage comparison module, a second voltage reduction module, a second indicator lamp, a third voltage comparison module, a third voltage reduction module and an electronic switch;
The first voltage comparison module is connected to a first reference voltage through a first voltage reduction module, the output end of the first voltage comparison module is connected with the first indicator lamp, and the input end of the first voltage comparison module is used for connecting a first electric wire; the first voltage comparison module is used for comparing the voltage loaded on the first electric wire with the first reference voltage reduced by the first voltage reduction module, when the voltage loaded on the first electric wire is larger than the first reference voltage reduced by the first voltage reduction module, the first voltage comparison module outputs a level signal to drive the first indicator lamp to emit light, otherwise, the first voltage comparison module does not output a level signal, and the first indicator lamp does not emit light;
The second voltage comparison module is connected to a second reference voltage lower than the first reference voltage through a second voltage reduction module, the output end of the second voltage comparison module is connected with the second indicator lamp, and the input end of the second voltage comparison module is used for connecting a second electric wire; the second voltage comparison module is used for comparing the voltage loaded on the second electric wire with the second reference voltage reduced by the second voltage reduction module, when the voltage loaded on the second electric wire is larger than the second reference voltage reduced by the second voltage reduction module, the second voltage comparison module outputs a level signal to drive the second indicator lamp to emit light, otherwise, the second voltage comparison module does not output a level signal, and the second indicator lamp does not emit light;
the third voltage comparison module is connected to a first reference voltage through a third voltage reduction module, the output end of the third voltage comparison module is connected with the control end of the electronic switch, the input end of the electronic switch is connected to the first reference voltage, the output end of the electronic switch is connected to a second reference voltage, and the electronic switch is used for loading the first reference voltage to the second voltage comparison module when being conducted; the third voltage comparison module is used for comparing the voltage applied by the second electric wire with the first reference voltage reduced by the third voltage reduction module, and when the voltage applied by the second electric wire is greater than the first reference voltage reduced by the third voltage reduction module, the output end of the third voltage comparison module outputs a level signal to drive the electronic switch to be turned on;
The correct wire sequence is that the first wire is connected to the first reference voltage, and the second wire is connected to the second reference voltage; when the first indicator light and the second indicator light emit light, judging that the line sequence of the first electric wire and the second electric wire is correct; when the first indicator lamp and the second indicator lamp do not emit light, judging that the line sequence of the first electric wire and the second electric wire is incorrect;
The first reference voltage is 12V, the second reference voltage is 9V, the first reference voltage reduced by the first voltage reducing module is 11.8V, the second reference voltage reduced by the second voltage reducing module is 8.8V, and the first reference voltage reduced by the third voltage reducing module is 11.8V.
2. The flat cable detection circuit of claim 1, wherein the first voltage comparison module comprises a first op-amp, a third resistor, a thirty-first resistor, a twenty-second resistor, and a twenty-sixth resistor, and the first voltage reduction module comprises a seventh resistor, an eighth resistor, and a sixth capacitor;
one end of the third resistor is connected with the non-inverting input end of the first operational amplifier, the other end of the third resistor is grounded through the thirty-th resistor, and the other end of the third resistor is used for being connected with a first electric wire;
The inverting input end of the first operational amplifier is connected to the first reference voltage through the seventh resistor, and the inverting input end of the first operational amplifier is grounded through a parallel circuit formed by the eighth resistor and the sixth capacitor;
The output end of the first operational amplifier is grounded through the twenty-sixth resistor, and the output end of the first operational amplifier is connected with the first indicator lamp through the twenty-second resistor.
3. The flat cable detection circuit according to claim 1, wherein the second voltage comparison module comprises a second op-amp, a fourth resistor, a thirty-first resistor, a twenty-third resistor, and a twenty-seventh resistor, the second voltage reduction module comprising
The ninth resistor, the tenth resistor and the seventh capacitor are included;
one end of the fourth resistor is connected with the non-inverting input end of the second operational amplifier, the other end of the fourth resistor is grounded through the thirty-first resistor, and the other end of the fourth resistor is used for being connected with a second electric wire;
the inverting input end of the second operational amplifier is connected to the second reference voltage through the ninth resistor, and is grounded through a parallel circuit formed by the tenth resistor and the seventh capacitor;
The output end of the second operational amplifier is grounded through the twenty-seventh resistor, and the output end of the second operational amplifier is connected with the second indicator lamp through the twenty-third resistor.
4. A flat cable detection circuit according to claim 3, wherein the third voltage comparison module comprises a third op amp, a sixteenth resistor and a seventeenth resistor; the third voltage reduction module comprises a fifteenth resistor; the electronic switch comprises a field effect transistor;
The inverting input end of the third operational amplifier is connected to the first reference voltage through the fifteenth resistor, the non-inverting input end of the third operational amplifier is used for being connected with a second electric wire, the output end of the third operational amplifier is connected with the grid electrode of the field effect transistor through the sixteenth resistor, and the output end of the third operational amplifier is grounded through the seventeenth resistor;
the drain electrode of the field effect transistor is connected to the first reference voltage, and the source electrode of the field effect transistor is connected with the inverting input end of the second operational amplifier.
5. A flat cable detection circuit according to any one of claims 1-4, further comprising a flat cable receptacle; the flat cable socket is provided with a first port and a second port, the first port is connected with the input end of the first voltage comparison module, and the second port is connected with the input end of the second voltage comparison module; the first port is used for connecting a first electric wire, and the second port is used for connecting a second electric wire.
6. A flat cable detection system comprising a plurality of flat cable detection circuits according to any one of claims 1 to 5.
7. The flat cable detection system of claim 6, wherein a first reference voltage corresponding to each of the flat cable detection circuits decreases in sequence, and a second reference voltage corresponding to each of the flat cable detection circuits decreases in sequence.
8. A flat cable detection method, the flat cable comprising a first wire and a second wire, wherein the following steps are performed using the flat cable detection circuit according to any one of claims 1 to 5:
Connecting one end of a first wire to the input end of the first voltage comparison module, and connecting one end of a second wire to the input end of the second voltage comparison module;
Applying a first test voltage having the same magnitude as the first reference voltage to the other end of the first wire, and applying a second test voltage having the same magnitude as the second reference voltage to the other end of the second wire;
when the first indicator light and the second indicator light emit light, the line sequence of the first electric wire and the line sequence of the second electric wire are judged to be correct, otherwise, the line sequence of the first electric wire and the line sequence of the second electric wire are judged to be incorrect.
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