CN217543315U - Detection circuit and detection device - Google Patents

Abstract

The utility model discloses a detection circuitry and detection device relates to power electronic device test technical field for carry out accurate sampling, discernment and recording circuit board's trouble position to the electric current of electron integrated circuit board. The detection circuit includes: the device comprises a power supply unit, a detection unit, a signal amplification unit and a control unit, wherein the power supply unit is electrically connected with a board card to be detected through the detection unit; the first input end of the signal amplification unit is connected between the detection unit and the power supply unit, the second input end of the signal amplification unit is connected between the detection unit and the board card to be detected, and the output end of the signal amplification unit is electrically connected with the control unit and used for amplifying the working voltage of the board card to be detected and sending the working voltage to the control unit; the control unit is used for detecting the board card to be detected according to the amplified working voltage. The detection device comprises the detection circuit provided by the technical scheme. The utility model provides a detection circuitry is used for detecting the electric current situation of change of the integrated circuit board that awaits measuring.

Description

Detection circuit and detection device

Technical Field

The utility model relates to a power electronic device tests technical field, especially relates to a detection circuitry and detection device.

Background

Current is an important parameter in the circuit, and during the operation of the electronic circuit, the current level varies with the operation of the circuit board.

In the prior art, when an electronic board card is maintained, only the change of current and voltage can be seen, the change of current cannot be converted and stored, and each change point position cannot be accurately identified; in addition, the current change amplitude of the electronic board card is small and is not easy to collect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a detection circuitry and detection device for carry out the precision sampling to the electric current of electron integrated circuit board, discernment and recording circuit board's trouble position.

In a first aspect, the utility model provides a detection circuit for detect the electric current situation of change of the integrated circuit board that awaits measuring. The detection circuit includes: the device comprises a power supply unit, a detection unit, a signal amplification unit and a control unit, wherein the power supply unit is used for supplying power to the detection unit; the power supply unit is electrically connected with the board card to be tested through the detection unit. The first input end of the signal amplification unit is connected between the detection unit and the power supply unit, the second input end of the signal amplification unit is connected between the detection unit and the board card to be detected, and the output end of the signal amplification unit is electrically connected with the control unit and used for amplifying the working voltage of the board card to be detected and sending the working voltage to the control unit. The control unit is used for detecting the board card to be detected according to the amplified working voltage.

Under the condition of adopting above-mentioned technical scheme, because the control unit can't directly detect the current signal, comes the direct fault condition who detects the integrated circuit board that awaits measuring through the current signal, so pass through detecting element and await measuring the board card electric connection with the power supply unit for after waiting to detect the board card income detection circuitry, can utilize detecting element to export voltage signal. The first input end of the signal amplification unit is connected between the detection unit and the power supply unit, the second input end of the signal amplification unit is connected between the detection unit and the board card to be detected, and the output end of the signal amplification unit is electrically connected with the control unit. The control unit quantizes, encodes and stores the amplified voltage signal acquired within a certain time, compares the stored voltage change condition within the certain time with the preset voltage change condition within the same time, and can judge the fault point position of the board card to be detected. Therefore, the utility model provides a detection circuitry can react out the electric current situation of change of waiting to detect the board card in the certain time through the voltage situation of change that detects the board card in the certain time to compare with the situation of change of presetting voltage in the same time, judge the trouble position of the integrated circuit board that awaits measuring, realized accurate sampling and the conversion save of the integrated circuit board electric current that awaits measuring, and can specifically judge the trouble position of the integrated circuit board that awaits measuring. In addition, the signal amplification unit can multiply and amplify the acquired voltage, so that the voltage amplitude value is increased, and the control unit is convenient to acquire.

In a second aspect, the present invention further provides a detection apparatus, which includes the detection circuit described in the first aspect or any one of the possible implementations of the first aspect.

Compared with the prior art, the utility model provides a detection device's beneficial effect is the same with the beneficial effect of the detection circuitry that first aspect or any possible implementation of first aspect described, and the here is not repeated.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic diagram of a first module of a detection circuit according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a second module of the detection circuit according to the embodiment of the present invention;

fig. 3 is a first schematic circuit diagram of the detection circuit according to the embodiment of the present invention;

fig. 4 is a second circuit diagram of the detection circuit according to the embodiment of the present invention;

fig. 5 is a schematic diagram of a detection device according to an embodiment of the present invention.

Attached drawings marking:

10-a power supply unit, 11-a detection unit,

12-a signal amplification unit, 13-a control unit,

14-a board card to be tested, 15-a buffer unit,

16-signal input module, 101-adjustable dc power supply,

111-a sampling resistor, 121-an operational amplifier,

131-a singlechip, 151-a voltage follower,

161-touch screen, 201-power supply board card,

202-main control board card, 20-circuit board card.

Detailed Description

For the convenience of clearly describing the technical solution of the embodiment of the present invention, in the embodiment of the present invention, the words "first", "second", etc. are adopted to distinguish the same items or similar items with basically the same functions and actions. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It is to be understood that the terms "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b combination, a and c combination, b and c combination, or a, b and c combination, wherein a, b and c can be single or multiple.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a detection circuit for detecting a current variation condition of a board card 14 to be detected. The detection circuit includes: a power supply unit 10, a detection unit 11, a signal amplification unit 12 and a control unit 13, wherein; the power supply unit 10 is electrically connected with the board card 14 to be tested through the detection unit 11. A first input end of the signal amplification unit 12 is connected between the detection unit 11 and the power supply unit 10, a second input end of the signal amplification unit 12 is connected between the detection unit 11 and the board card 14 to be detected, and an output end of the signal amplification unit 12 is electrically connected with the control unit 13, and is used for amplifying the working voltage of the board card 14 to be detected and sending the working voltage to the control unit 13. The control unit 13 is configured to detect the board card 14 to be detected according to the amplified working voltage.

In specific implementation, as shown in fig. 1 and 2, the power supply unit 10 is first turned on to supply power to the whole detection circuit; after the power supply unit 10 is turned on, the board card 14 to be tested is connected to the detection circuit, and the current output by the power supply unit 10 is the actual power utilization current of the board card 14 to be tested. The signal amplification unit 12 amplifies the voltages acquired by the first input end and the second input end and outputs the voltages to the control unit 13, the control unit 13 compares the amplified voltages within a certain time with preset voltages within the same time, and the fault point position of the board card 14 to be detected is determined according to the change of the voltages within each time period.

As can be seen from the above structure and specific implementation process of the detection circuit, as shown in fig. 1 and fig. 2, since the control unit 13 cannot directly detect the current signal, and directly detects the fault condition of the board card 14 to be detected through the current signal, the power supply unit 10 is electrically connected to the board card 14 to be detected through the detection unit 11, so that after the board card 14 to be detected is connected to the detection circuit, the detection unit 11 can be used to output a voltage signal. The first input end of the signal amplification unit 12 is connected between the detection unit 11 and the power supply unit 10, the second input end is connected between the detection unit 11 and the board card 14 to be detected, and the output end is electrically connected with the control unit 13, that is, the first input end and the second input end of the signal amplification unit 12 are connected at two ends of the detection unit 11, so that voltage signals input from two ends of the detection unit 11 can be amplified, and the subsequent control unit 13 can collect and record the voltage signals conveniently. The control unit 13 quantizes, encodes and stores the amplified voltage signal acquired within a certain time, compares the stored voltage variation condition of each stage within a certain time with the voltage variation condition of each preset stage within the same time, and can determine the fault point location of the board card 14 to be tested. Therefore, the embodiment of the utility model provides a detection circuitry can reflect the electric current situation of change of integrated circuit board 14 in the definite time that awaits measuring through the voltage situation of change of integrated circuit board 14 in the definite time that detects to after contrasting with the situation of change of voltage of predetermineeing in the same time, can judge the trouble position of integrated circuit board 14 that awaits measuring through the control unit 13, realized the accurate sampling and the conversion save of integrated circuit board 14 electric current that awaits measuring, and can specifically judge the trouble position of integrated circuit board 14 that awaits measuring. In addition, the signal amplifying unit 12 may multiply amplify the collected voltage, so that the voltage amplitude is increased, which is convenient for the control unit 13 to collect.

In some examples, the preset voltage is a voltage variation of a standard board without a fault, which is acquired by the detection circuit in the same time. When the board card to be detected is a fault board card, the internal resistance of the board card to be detected changes, and because the power supply unit outputs a stable voltage signal, when the internal resistance of the board card to be detected changes, the current in the detection circuit also changes correspondingly, so that the current change condition of the board card to be detected in a certain time is compared with the current change condition of the standard board card in the same time, and the fault point position of the board card to be detected can be judged in an assisted manner. During specific implementation, current collection can be performed on the standard board card before current collection is performed on the board card to be detected, and current data of the standard board card is compared with current data of a subsequent board card to be detected.

In some examples, when the control unit collects the voltage change condition of the board card to be tested within a certain time, a/D sampling can be performed through the a/D conversion module, and the collected voltage signal is converted into a digital signal, so that the voltage signal can be conveniently quantized, encoded, stored and compared in the following process. After the acquired voltage signals are converted into digital signals, quantization is further performed, the acquired data are encoded and stored in the control unit according to a certain format after the quantization is completed, the encoding format is various, and the specific format can be selected according to actual requirements, which is not listed one by one.

In some examples, as shown in fig. 3 and 4, the board under test 14 further has a ground terminal.

As a possible implementation, the detection circuit further comprises a buffer unit 15, as shown in fig. 2. The input end of the buffer unit 15 is electrically connected with the output end of the signal amplification unit 12, and the output end of the buffer unit 15 is electrically connected with the control unit 13, and is used for buffering and isolating the signal amplification unit 12 and the control unit 13. Based on this, buffer unit 15 is connected between signal amplification unit 12 and control unit 13, and the voltage signal that the output from signal amplification unit 12 was exported the same size voltage signal for control unit 13 after buffer unit 15, has guaranteed the precision of collection, and signal amplification unit 12 and control unit 13 are separated to buffer unit 15's setting, play the effect of buffering isolation, prevent because of the interference that influences the cause between the circuit before and after buffer unit 15.

In some examples, as shown in fig. 2 and 4, the buffer unit 15 includes a voltage follower 151.

Illustratively, the voltage follower may be an LM358 voltage follower, an LM4562 voltage follower, an OP37 voltage follower, an OPA313 voltage follower, an OPA237 voltage follower, and the like, which are only examples and are not limited to specific types of voltage followers.

As a possible implementation, as shown in fig. 1 to 4, the power supply unit 10 includes an adjustable dc power supply 101. The adjustable direct current power supply 101 has an input end, a first output end, a second output end and a ground end, the input end of the adjustable direct current power supply 101 is electrically connected with an external power supply, the first output end is electrically connected with the detection unit 11, and the second output end is electrically connected with the control unit 13. Therefore, for different boards 14 to be detected, the required rated input voltages are different, and the adjustable direct current power supply 101 can adjust the voltage output to the detection circuit according to the input voltages specified by the different boards 14 to be detected, so that the model selection range of the boards 14 to be detected is widened, and the detection cost is reduced.

In some examples, the adjustable DC power source may be a DC-DC switching power source, and in particular, may be a PH100A280-12 switching power source, a CPF1000F280-14 switching power source, a CCG1R5-12-03SF switching power source, a PAF500F24-12 switching power source, an i3A4W005A150V-001-R switching power source, an i7C2W020A120V-001-R switching power source, or the like; or a DC power supply with a DC-DC power converter. The DC power source may be a DS1000 DC power source, an E3630A DC power source, a B2961A DC power source, an N8754A DC power source, a QJ3003S DC power source, etc., and the DC-DC power converter may be an FHP8N60 converter, a TK10A60DA converter, a DP2596 converter, an FQP8N60 converter, etc., which are only examples and are not limited to specific types of the adjustable DC power source.

As a possible implementation, as shown in fig. 1 to 4, the detection circuit further includes a signal input module 16. The signal input module 16 is electrically connected to the control unit 13, and is configured to adjust the output voltage of the adjustable dc power supply 101 through the control unit 13. The switching function of the control unit 13 may also be controlled by the signal input module 16, for example, the time for collecting current may be set by the signal input module 16, or the control unit 13 is controlled by the signal input module 16 to compare the current change condition of the board to be tested 14 with the current change condition of a standard board, or perform data storage by the signal input module 16, which are not listed here.

In some examples, as shown in fig. 1-4, the signal input module 16 includes a touch screen 161. Switching of functions and display of data can be realized by the touch screen 161.

The touch screen may be, for example, an MT200 touch screen, a TK6071IP touch screen, an F104E-CAN touch screen, a 6AV6648-0CC11-3AX0 touch screen, etc., and the touch screen is not limited to a specific model.

As a possible implementation, as shown in fig. 1 to 4, the detection unit 11 includes a sampling resistor 111. The first end of the sampling resistor 111 is electrically connected to the first output end of the adjustable dc power supply 101, and the second end is electrically connected to the board card 14 to be tested. Since the control unit 13 cannot recognize the current signal, the current signal is converted into a voltage signal by the sampling resistor 111, which facilitates the recognition and recording of the control unit 13. The resistance value of the sampling resistor 111 preferably ranges from 0.001 Ω to 0.1 Ω. In practice, if the sampling resistor 111 with a large resistance is adopted, since the sampling resistor 111 and the board card 14 to be tested form a partial voltage, and since the resistance is large, the sampling resistor 111 will divide most of the voltage, so that the board card 14 to be tested and other devices behind the board card 14 to be tested are in a state of insufficient power supply; for example, if the board card 14 to be tested needs a current of 1A, and the resistance of the sampling resistor 111 is 1000 Ω, the sampling resistor 111 will reduce the current to be very small, and the board card 14 to be tested cannot work normally, so the sampling resistor 111 with the smaller resistance needs to be selected, and thus the sampling resistor 111 will only divide a very small voltage.

As one possible implementation, as shown in fig. 1 to 4, the signal amplification unit 12 includes an operational amplifier 121. The operational amplifier 121 has a first input end, a second input end and an output end, the first input end of the operational amplifier 121 is connected between the adjustable dc power supply 101 and the sampling resistor 111, the second input end is connected between the sampling resistor 111 and the board card 14 to be tested, and the output end is electrically connected to the control unit 13. Because the resistance range selected by the sampling resistor 111 is small, if the sampling is directly acquired by the control unit 13, the acquired voltage amplitude is small, and the control unit 13 cannot recognize the voltage signal; therefore, the operational amplifier 121 needs to be arranged between the control unit 13 and the sampling resistor 111, and the voltage signal passing through the operational amplifier 121 can be amplified by several times, so that the acquired voltage signal can be identified by the control unit 13, the voltage amplitude can also be obviously changed, and the acquisition accuracy is ensured.

In some examples, the operational amplifier may be a CA3130 operational amplifier, an LM2904 operational amplifier, an OPA445 operational amplifier, an AD620 operational amplifier, an OP07D operational amplifier, and the like, which are given by way of example only and do not limit the specific type of operational amplifier.

As a possible implementation manner, the control unit is one of a single chip, a programmable logic controller and a microprocessor.

In some examples, as shown in fig. 3 and 4, the control unit 13 may be a single chip 131. The single chip 131 is electrically connected to the adjustable dc power supply 101 and the touch screen 161, and the single chip 131 may also be electrically connected to the operational amplifier 121 or the voltage follower 151. The single chip microcomputer 131 has the advantages of being small in size, high in integration level, strong in control capability, high in performance and the like, can perform A/D conversion, recording, comparison and judgment on the collected current transformation condition of the board card 14 to be tested, calculates the error quantity of the board card to be tested, and determines the fault condition of the board card 14 to be tested more easily.

Exemplarily, the utility model provides a singlechip can be 51 singlechips, MSP singlechip, STM32 singlechip and AVR singlechip etc. and here is just done the example, does not restrict the specific model of singlechip.

The embodiment of the utility model provides a still provide a detection device, including the detection circuitry that describes in the above-mentioned embodiment.

Compared with the prior art, the embodiment of the utility model provides a detection device's beneficial effect is the same with the beneficial effect of the detection circuitry that above-mentioned embodiment described, and the here is not repeated.

As a possible implementation manner, as shown in fig. 1, fig. 2 and fig. 5, the detection apparatus further includes a circuit board 20, the circuit board 20 is divided into a power board 201 and a main control board 202, the power supply unit is located at the power board 201, and the detection unit, the signal amplification unit, the control unit, the buffer unit and the signal input module 16 are located at the main control board 202.

In some examples, as shown in fig. 5, the outside of the POWER board 201 has a "POWER INPUT" port for inputting POWER to the POWER supply unit and a "GND" port for grounding the POWER supply unit, and also has a "POWER OUTPUT" port electrically connected to the board to be tested and a "GND" port for grounding the board to be tested.

While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present invention has been described in connection with the specific features and embodiments thereof, it is apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are merely illustrative of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

1. The utility model provides a detection circuit for detect the current change condition of the integrated circuit board that awaits measuring, detection circuit includes: the device comprises a power supply unit, a detection unit, a signal amplification unit and a control unit, wherein the power supply unit is used for supplying power to the detection unit;

the power supply unit is electrically connected with the board card to be detected through the detection unit;

the first input end of the signal amplification unit is connected between the detection unit and the power supply unit, the second input end of the signal amplification unit is connected between the detection unit and the board card to be detected, and the output end of the signal amplification unit is electrically connected with the control unit and used for amplifying the working voltage of the board card to be detected and sending the working voltage to the control unit;

the control unit is used for detecting the board card to be detected according to the amplified working voltage.

2. The detection circuit according to claim 1, further comprising a buffer unit, wherein an input terminal of the buffer unit is electrically connected to an output terminal of the signal amplification unit, and an output terminal of the buffer unit is electrically connected to the control unit, for buffering and isolating the signal amplification unit and the control unit.

3. The detection circuit of claim 2, wherein the buffer unit comprises a voltage follower.

4. The detection circuit of claim 1, wherein the power supply unit comprises an adjustable dc power supply;

the detection circuit further comprises a signal input module, wherein the signal input module is electrically connected with the control unit and used for adjusting the output voltage of the adjustable direct current power supply through the control unit.

5. The detection circuit of claim 4, wherein the signal input module comprises a touch screen.

6. The detection circuit of claim 1, wherein the detection cell comprises a sampling resistor.

7. The detection circuit of claim 1, wherein the signal amplification unit comprises an operational amplifier.

8. The detection circuit of claim 1, wherein the control unit is one of a single chip, a programmable logic controller, and a microprocessor.

9. A detection device comprising the detection circuit according to any one of claims 1 to 8.

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