CN212811640U

CN212811640U - Multifunctional amplifier

Info

Publication number: CN212811640U
Application number: CN202022295993.3U
Authority: CN
Inventors: 杜寿余; 陈冬梅
Original assignee: Yangzhou Yunsheng Electronic Technology Co ltd
Current assignee: Yangzhou Yunsheng Electronic Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-03-26
Anticipated expiration: 2030-10-15

Abstract

The utility model discloses a multifunctional amplifier. Relates to a test device, in particular to an improvement of an amplifier. The multifunctional amplifier is simple in operation process and convenient to use. The device comprises an input/gain switching module, a CHARGE amplification module, an IEPE amplification module and a dynamic STRAIN measurement module, wherein a CHARGE-OUT port of the input/gain switching module is connected with a CHARGE-OUT port of the CHARGE amplification module, an ICP-OUT port of the input/gain switching module is connected with the IEPE-OUT port of the IEPE amplification module, a STRAIN-OUT port of the input/gain switching module is connected with a STRAIN-OUT port of the STRAIN measurement module, and the input/gain switching module is used for controlling the sequential switching of the CHARGE amplification module, the dynamic STRAIN measurement module and the IEPE amplification module. Can be freely combined into a charge amplifier, an IEPE amplifier and a dynamic strain amplifier, and is convenient for field use.

Description

Multifunctional amplifier

Technical Field

The utility model relates to a test equipment especially relates to the improvement of amplifier.

Background

At present, in the testing process, different amplifiers are needed for measurement of different variables and measurement of the same variable under different application environments, for example, a piezoelectric accelerometer or an in-built circuit type (IEPE) accelerometer is needed for measurement of acceleration, a dynamic strain gauge is needed for measurement of stress, the traditional measuring mode is to respectively adopt the three devices to measure corresponding variables, the instrument needs to be replaced each time when multiple parameters such as vibration and strain of a large component are measured in multiple points, the operating rules of each instrument are different, the measuring process is complicated, and the use is extremely inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a multifunctional amplifier with simple operation process and convenient use.

The utility model discloses a following technical scheme realizes: the multifunctional amplifier comprises an input/gain switching module, a CHARGE amplifying module, an IEPE amplifying module and a dynamic STRAIN measuring module, wherein a CHARGE-OUT port of the input/gain switching module is connected with a CHARGE-OUT port of the CHARGE amplifying module, an ICP-OUT port of the input/gain switching module is connected with the IEPE-OUT port of the IEPE amplifying module, a STRAIN-OUT port of the input/gain switching module is connected with a STRAIN-OUT port of the STRAIN measuring module, and the input/gain switching module is used for controlling the sequential switching of the CHARGE amplifying module, the dynamic STRAIN measuring module and the IEPE amplifying module.

The input/gain switching module comprises an input switching module and a gain switching module, the input switching module sequentially switches the multifunctional amplifier among the charge amplification module, the dynamic strain measurement module and the IEPE amplification module, and the gain switching module switches the gain value of the multifunctional amplifier.

The circuit connection of the input switching module is as follows:

pin 1 of socket XS9 is connected to pull-up resistor R25, pin 1 of nor gate N4A, and pin 12 of nor gate N4D, respectively;

pin 3 of socket XS9 connects pull-up resistor R24, pin 5 of NOR gate N4B and pin 13 of NOR gate N4D, pin 2 of socket XS1 connects negative power terminal;

pin 11 of the nor gate N4D is connected to pin 2 of the nor gate N4A and pin 6 of the nor gate N4B, respectively, pin 3 of the nor gate N4A is connected to pin 8 of the nor gate N4C, and pin 4 of the nor gate N4B is connected to pin 9 of the nor gate N4C;

pin 3 of the nor gate N4A is connected to pin 6 of the multiple analog switch N5C, pin 10 of the nor gate N4D is connected to pin 5 of the multiple analog switch N5C, and pin 4 of the nor gate N4B is connected to pin 12 of the multiple analog switch N5B;

the pin 10 of the multi-path analog switch N5B, the pin 3 of the multi-path analog switch N5C and the pin 9 of the multi-path analog switch N5D are connected, and the pin 3 of the operational amplifier N8 is connected through a first-order high-pass filter consisting of a capacitor C4 and a resistor R29.

The circuit connection of the gain switching module is as follows:

pin 1 of socket XS10 is respectively connected with pull-up resistor R28, pin 1 of nor gate N6A and pin 12 of nor gate N6D, pin 3 of socket XS10 is respectively connected with pull-up resistor R27, pin 5 of nor gate N6B and pin 13 of nor gate N6D, and pin 2 of socket XS10 is connected with a negative power supply terminal;

pin 11 of the nor gate N6D is connected to pin 2 of the nor gate N6A and pin 6 of the nor gate N6B, respectively, pin 3 of the nor gate N6A is connected to pin 8 of the nor gate N6C, and pin 4 of the nor gate N6B is connected to pin 9 of the nor gate N6C;

pin 3 of the nor gate N6A is connected to pin 6 of the multiple analog switch N7D, pin 10 of the nor gate N6C is connected to pin 5 of the multiple analog switch N7C, pin 4 of the nor gate N6B is connected to pin 12 of the multiple analog switch N7B, pin 10 of the multiple analog switch N7B, pin 3 of the multiple analog switch N7C and pin 9 of the multiple analog switch N7D are connected to pin 2 of the operational amplifier N8, and pin 6 of the operational amplifier N8 is connected to the resistor R30, the resistor R31 and the resistor R33, respectively, and is connected to the resistor 1 of the socket XS 11.

The circuit connection of the charge amplification module is as follows: one ends of capacitors C1 and C2 of the analog capacitor Ct are connected, and the other end of the capacitor C1 is connected with one ends of a resistor R1 and a resistor R2;

the other end of the resistor R1 is connected with a pin 2 of the operational amplifier N1, a pin 3 of the operational amplifier N1 is grounded, and the other end of the capacitor C2 is connected with the other ends of the resistor R2 and the resistor R3 respectively; pin 6 of the operational amplifier N1 is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to pin 1 of the socket XS2, and is connected to the capacitor C2 and the resistor R2.

The circuit connection of the IEPE amplifying module is as follows:

the PNP triode V1, the resistor R4, the resistor R5 and the resistor R6 form a constant current source, the power supply voltage of the constant current source is connected with a pin 1 of a socket XS5, the power is supplied to the emitter of the triode through a resistor R6, and the power is divided through a resistor R5 and a resistor R4 and then is connected with the base electrode of the PNP triode V1;

the input end of the sensor is connected with the collector of the triode and is connected to one end of a capacitor C1, the other end of the capacitor C1 is connected to one end of a resistor R7 and is connected with a pin 3 of an operational amplifier N2, the other end of the resistor R7 is grounded, and a pin 6 of an operational amplifier N2 is connected with a pin 2 of an operational amplifier N2 and is connected to a pin 1 of a socket XS 4.

The circuit connection of the dynamic strain measurement module is as follows:

the reference voltage chip XS6 is connected with a positive power supply VCC through a resistor R14, then is converted into 1V direct current through voltage division of a potentiometer RP1, a resistor R15 and a resistor R16 and is transmitted to a pin 5 of an operational amplifier N3B, a pin 7 of the operational amplifier N3B is connected to a pin 3 of a socket XS8 through a resistor R8, a pin 4 of a socket XS8 is connected with a pin 3 of a socket XS8 through a resistor R10, then is connected with a pin 3 of an operational amplifier N3A through a resistor R12, and a pin 1 of the operational amplifier N3A is connected with a pin 2 of the operational amplifier N3A and a pin 6 of the operational amplifier N3B respectively;

a pin 6 of the operational amplifier N3B is connected with a pin 9 of the operational amplifier N3C through a resistor R17, a pin 8 of the operational amplifier N3C is connected with a pin 2 of the socket XS8 through a resistor R9, a pin 1 of the socket XS8 is connected with the pin 2 of the socket XS8 through a resistor R11, and then is connected with a pin 12 of the operational amplifier N3D through a resistor R13, a pin 14 of the operational amplifier N3D is connected with a pin 13 of the operational amplifier N3D, a pin 13 of the operational amplifier N3D is connected with a pin 9 of the operational amplifier N3C through a resistor R18, and a pin 10 of the operational amplifier N3C is grounded;

a pin 7 of the socket XS8 is connected with a pin 2 of the operational amplifier N4 through a resistor R20, a pin 6 of the socket XS8 is connected with a pin 3 of the operational amplifier N4 through a resistor R19, and a pin 5 of the socket XS8 is grounded;

a resistor R21 and a potentiometer RP2 are connected between a pin 1 and a pin 8 of the operational amplifier N4, and the potentiometer RP2 is adjusted to enable the gain of the operational amplifier N4 to be 100 times. The 5 pin of the operational amplifier N4 is grounded, and the 6 pin of the operational amplifier N4 is connected with the 1 pin of the socket XS 7.

The input switching module further comprises a light emitting module, the light emitting module comprises a light emitting diode L1, a light emitting diode L2 and a light emitting diode L3, and a cathode of the light emitting diode L1, a cathode of the light emitting diode L2 and a cathode of the light emitting diode L3 are grounded through a resistor R26 respectively;

the anode of the light emitting diode L1 is connected with a pin 6 of a multi-way analog switch N5D, the anode of the light emitting diode L2 is connected with a pin 5 of a multi-way analog switch N5C, and the anode of the light emitting diode L3 is connected with a pin 12 of a multi-way analog switch N5B.

Compared with the prior art, the utility model discloses a three-gear knob switch (multichannel analog switch) that amplifier circuit is small has switched charge, meeting an emergency, IEPE signal input respectively through special digital logic circuit, adopts three-gear knob switch (multichannel analog switch) that small and has switched

amplifier gain

1, 10, 100 respectively through special digital logic circuit simultaneously. The amplifier has small volume, low price and multiple functions, and can carry out multi-point measurement on parameters of vibration, strain and the like of a large member. When the amplifiers of the application are combined into a multi-channel case, the amplifiers can be combined into a charge amplifier, an IEPE amplifier and a dynamic strain amplifier at will, and the field use is very convenient.

Drawings

FIG. 1 is a schematic circuit diagram of an input/gain switching module according to the present invention;

fig. 2 is a schematic circuit diagram of a charge amplifying module according to the present invention;

fig. 3 is a schematic circuit diagram of an IEPE amplification module according to the present invention;

fig. 4 is a schematic circuit diagram of the middle dynamic strain measurement module according to the present invention;

fig. 5 is a circuit schematic of the toggle switch.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1 to 5, the multifunctional amplifier includes an input/gain switching module, a CHARGE amplifying module, an IEPE amplifying module and a dynamic STRAIN measuring module, wherein a CHARGE-OUT port of the input/gain switching module is connected to a CHARGE-OUT port of the CHARGE amplifying module, an ICP-OUT port of the input/gain switching module is connected to an IEPE-OUT port of the IEPE amplifying module, a STRAIN-OUT port of the input/gain switching module is connected to a STRAIN-OUT port of the STRAIN measuring module, and the input/gain switching module controls the CHARGE amplifying module, the dynamic STRAIN measuring module and the IEPE amplifying module to be sequentially switched. The sensor can be connected with sensors such as a piezoelectric accelerometer, a resistance strain gauge, an in-circuit (IEPE) accelerometer and the like, and is used for measuring physical quantities such as acceleration, dynamic stress and the like. The instrument has the characteristics of simple operation and convenient use, can be used for multipoint measurement by specially measuring the parameters of vibration, strain and the like of a large member, can be used for an accelerometer and a strain gauge, simplifies a system and is convenient to operate.

The circuit connection of the input switching module is as follows:

pin 1 of socket XS9 is connected to pull-up resistor R25, pin 1 of nor gate N4A, and pin 12 of nor gate N4D, respectively; pin 3 of socket XS9 connects pull-up resistor R24, pin 5 of NOR gate N4B and pin 13 of NOR gate N4D, pin 2 of socket XS1 connects negative power terminal; pin 11 of the nor gate N4D is connected to pin 2 of the nor gate N4A and pin 6 of the nor gate N4B, respectively, pin 3 of the nor gate N4A is connected to pin 8 of the nor gate N4C, and pin 4 of the nor gate N4B is connected to pin 9 of the nor gate N4C; pin 3 of the nor gate N4A is connected to pin 6 of the multiple analog switch N5C, pin 10 of the nor gate N4D is connected to pin 5 of the multiple analog switch N5C, and pin 4 of the nor gate N4B is connected to pin 12 of the multiple analog switch N5B; the pin 10 of the multi-path analog switch N5B, the pin 3 of the multi-path analog switch N5C and the pin 9 of the multi-path analog switch N5D are connected, and the pin 3 of the operational amplifier N8 is connected through a first-order high-pass filter consisting of a capacitor C4 and a resistor R29.

The mode switch and the gain switch both adopt three-gear knob switches, and when the level of the control end of the knob switch is high level (1), the corresponding analog switch is switched on. The switch control terminal 12 of a multi-channel analog switch (model number CD4066) with the number N5 (including N5A, N5B, N5C and N5D) is labeled Cc, the switch control terminal 5 is labeled Cs, and the switch control terminal 6 is labeled Ci.

The correspondence between the toggle switch and the level is shown in table 1:

when the position of the toggle switch is in the left position, as shown in FIG. 5, the end C1 of the toggle switch (end C3) is connected to the end V; when the position of the knob switch is in the right position, the C0 end (C2 end) of the knob switch is connected with the V-end; when the knob switch is in the middle, the V-terminal of the knob switch is not connected to any terminal. When the terminal C0(C1, C2, C3) is connected to V- (negative level), it is low level 0; when the terminal C0(C1, C2, C3) is not connected to V-, the signal is at low level 1.

Mode(s)	C0	C1	Cc	Cs	Ci
						Electric charge	1	0	O	1	0
Strain of	1	1	O	0	1
						IEPE	0	1	1	0	0

Table 1 the correspondence between the toggle switch and the gain is shown in table 2:

gain of	C2	C3	Cg100	Cg1	Cg10
						1	1	0	0	1	0
10	1	1	0	0	1
						100	0	1	1	0	0

Table 2 the control levels Cc, Cs, Ci are related to C0, C1 as follows:

the switch control terminal 12 of a multi-channel analog switch (model number is CD4066) with the number of N7 (comprising N7A, N7B, N7C and N7D) is marked as Cg100, the switch control terminal 5 is marked as Cg1, the switch control terminal 6 is marked as Cg10, and the control levels Cg100, Cg1 and Cg10 are related to C2 and C3 as follows:

when Ci is high level (1), controlling the conduction of an 8 pin (marked as ICP-OUT) and a 9 pin; cs is connected with a pin 5 of a multi-way analog switch CD4066 with the reference number N2, and when Cs is at high level (1), a pin 4 (marked as STRAIN-OUT) is controlled to be conducted with a pin 3; cc is connected to pin 12 of the multiplexing analog switch CD4066, numbered N2, and when Cc is high (1), pin 11 (labeled CHARGE-OUT) is controlled to conduct with pin 10.

The circuit connection of the gain switching module is as follows:

pin 1 of socket XS10 is respectively connected with pull-up resistor R28, pin 1 of nor gate N6A and pin 12 of nor gate N6D, pin 3 of socket XS10 is respectively connected with pull-up resistor R27, pin 5 of nor gate N6B and pin 13 of nor gate N6D, and pin 2 of socket XS10 is connected with a negative power supply terminal; pin 11 of the nor gate N6D is connected to pin 2 of the nor gate N6A and pin 6 of the nor gate N6B, respectively, pin 3 of the nor gate N6A is connected to pin 8 of the nor gate N6C, and pin 4 of the nor gate N6B is connected to pin 9 of the nor gate N6C; pin 3 of the nor gate N6A is connected to pin 6 of the multiple analog switch N7D, pin 10 of the nor gate N6C is connected to pin 5 of the multiple analog switch N7C, pin 4 of the nor gate N6B is connected to pin 12 of the multiple analog switch N7B, pin 10 of the multiple analog switch N7B, pin 3 of the multiple analog switch N7C and pin 9 of the multiple analog switch N7D are connected to pin 2 of the operational amplifier N8, and pin 6 of the operational amplifier N8 is connected to the resistor R30, the resistor R31 and the resistor R33, respectively, and is connected to the resistor 1 of the socket XS 11. When a multi-way analog switch with the number of N7 (comprising N7A, N7B, N7C and N7D) is communicated with 9 pins (the 8 pins and the 9 pins form 1 switch), the amplification factor of the operational amplifier N8 is 1+ (R11+ R10)/R12 is 100; when a multi-path analog switch with the number of N7 is connected with 3 pins (the 4 pins and the 3 pins form 1 switch), the amplification factor of an operational amplifier N8 is 1+ R8/R9 is 10; when the 11 pins of the multi-path analog switch with the number of N7 are communicated with the 10 pins (the 11 pins and the 10 pins form 1 switch), the amplification factor of the operational amplifier N8 is equal to 1.

The three-gear toggle switch (multi-channel analog switch) with small volume of the amplifier circuit switches the charge, strain and IEPE signal input through a special digital logic circuit respectively, and simultaneously, the three-gear toggle switch (multi-channel analog switch) with small volume is adopted and the

amplifier gains

1, 10 and 100 are switched through the special digital logic circuit respectively. The amplifier has small volume, low price and multiple functions, and can carry out multi-point measurement on parameters of vibration, strain and the like of a large member. When the amplifiers of the application are combined into a multi-channel case, the amplifiers can be combined into a charge amplifier, an IEPE amplifier and a dynamic strain amplifier at will, and the field use is very convenient.

The circuit connection of the IEPE amplifying module is as follows:

The circuit connection of the dynamic strain measurement module is as follows:

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The multifunctional amplifier comprises an input/gain switching module, a charge amplification module, an IEPE amplification module and a dynamic strain measurement module, and is characterized in that: the CHARGE-OUT port of the input/gain switching module is connected with the CHARGE-OUT port of the CHARGE amplification module, the ICP-OUT port of the input/gain switching module is connected with the IEPE-OUT port of the IEPE amplification module, the STRAIN-OUT port of the input/gain switching module is connected with the STRAIN-OUT port of the STRAIN measurement module, and the input/gain switching module is used for controlling the sequential switching of the CHARGE amplification module, the dynamic STRAIN measurement module and the IEPE amplification module.

2. The multifunctional amplifier according to claim 1, wherein: the input/gain switching module comprises an input switching module and a gain switching module, the input switching module sequentially switches the multifunctional amplifier among the charge amplification module, the dynamic strain measurement module and the IEPE amplification module, and the gain switching module switches the gain value of the multifunctional amplifier.

3. The multifunctional amplifier according to claim 2, wherein: the circuit connection of the input switching module is as follows:

4. The multifunctional amplifier according to claim 2, wherein: the circuit connection of the gain switching module is as follows:

5. The multifunctional amplifier according to claim 2, wherein: the circuit connection of the charge amplification module is as follows: one ends of capacitors C1 and C2 of the analog capacitor Ct are connected, and the other end of the capacitor C1 is connected with one ends of a resistor R1 and a resistor R2;

6. The multifunctional amplifier according to claim 2, wherein: the circuit connection of the IEPE amplifying module is as follows:

7. The multifunctional amplifier according to claim 2, wherein: the circuit connection of the dynamic strain measurement module is as follows:

a resistor R21 and a potentiometer RP2 are connected between a pin 1 and a pin 8 of the operational amplifier N4, and the potentiometer RP2 is adjusted to enable the gain of the operational amplifier N4 to be 100 times; the 5 pin of the operational amplifier N4 is grounded, and the 6 pin of the operational amplifier N4 is connected with the 1 pin of the socket XS 7.

8. The multifunctional amplifier according to claim 3, wherein: the input switching module further comprises a light emitting module, the light emitting module comprises a light emitting diode L1, a light emitting diode L2 and a light emitting diode L3, and a cathode of the light emitting diode L1, a cathode of the light emitting diode L2 and a cathode of the light emitting diode L3 are grounded through a resistor R26 respectively;