CN218301232U - Power supply and detection circuit of two-wire system IEPE interface - Google Patents
Power supply and detection circuit of two-wire system IEPE interface Download PDFInfo
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- CN218301232U CN218301232U CN202222899259.7U CN202222899259U CN218301232U CN 218301232 U CN218301232 U CN 218301232U CN 202222899259 U CN202222899259 U CN 202222899259U CN 218301232 U CN218301232 U CN 218301232U
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Abstract
The utility model discloses a power supply and detection circuitry of two-wire system IEPE interface, include: supply circuit and detection circuitry, wherein, supply circuit includes: a voltage stabilizing diode, an adjustable potentiometer, a resistor and a triode; the detection circuit includes: the circuit comprises a direct current bias removing circuit, an output limit value circuit and an amplifying circuit. The utility model discloses can realize the conversion to vibration signal to can reach simple structure, low cost, output current adjustable purpose.
Description
Technical Field
The utility model relates to a sensor technical field, more specifically the utility model relates to a two-wire system IEPE sensor power supply and detection circuitry that says so.
Background
The IEPE sensor adopts a constant current source power supply mode, and simultaneously outputs a signal voltage representing a vibration value on a power supply loop. An IEPE constant current source circuit and a traditional constant current source mirror circuit are easy to generate heat and large in current fluctuation. At present, the output of the constant current source is realized by adopting schemes of an operational amplifier chip, an MOS (metal oxide semiconductor) tube and the like, and the circuit has the defects of large power consumption, high cost and influence on the output result due to more devices used by the circuit. The traditional constant current source mirror circuit is easy to generate heat, the triode parameter is not matched with the current, the current fluctuation is large, and the output result is influenced.
Disclosure of Invention
In view of this, the utility model provides a two-wire system IEPE interface power supply and detection circuitry to can realize the conversion to vibration signal in phase, reach simple structure, low cost, output current adjustable purpose.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model relates to a power supply and detection circuitry's of two-wire system IEPE interface characteristics include: a power supply circuit and a detection circuit;
the power supply circuit includes: a voltage stabilizing diode, an adjustable potentiometer, a resistor and a triode;
one end of the resistor is connected with one end and an adjustable end of the adjustable potentiometer respectively and then is connected with an external power supply, the other end of the adjustable potentiometer is connected with an emitting electrode of the triode, and a collector of the triode is the output end of the power supply circuit and is used for supplying power for an external IEPE sensor; the base electrode of the triode and the negative electrode of the voltage stabilizing diode V56 are both connected with the other end of the resistor; the anode of the voltage-stabilizing diode V56 is grounded;
the detection circuit includes: the circuit comprises a direct current bias removing circuit, an output limit value circuit and an amplifying circuit; the output limit value circuit is a voltage stabilizing diode V69;
the dc offset removal circuit includes: five resistors, one operational amplifier D26A and a zener diode V68;
the anode of the operational amplifier D26A is connected to one end of the resistor R300 and one end of the resistor R301, respectively, and the other end of the resistor R300 is connected to the output end of the external IEPE sensor; the other end of the resistor R301 is grounded;
the cathode of the operational amplifier D26A is connected to one end of the resistor R298 and one end of the resistor R299, respectively; the other end of the resistor R298 is connected with one end of the resistor R297 and the cathode of the zener diode V68, respectively; the anode of the voltage stabilizing diode V68 is grounded; the other end of the resistor R297 is connected with the external power supply;
the output end of the operational amplifier D26A is respectively connected with the other end of the resistor R299 and the cathode of a voltage stabilizing diode V69, and the anode of the voltage stabilizing diode V69 is grounded; the operational amplifier D26A is used for outputting an analog voltage Uo1 of 0-5V;
the amplifying circuit comprises three resistors and an operational amplifier D26B;
the anode of the operational amplifier D26B is connected with the output end of the operational amplifier D26A through a resistor R302;
the cathode of the operational amplifier D26B is connected to one end of the resistor R303 and one end of the resistor R304, respectively; the other end of the resistor R303 is grounded; the other end of the resistor R304 is connected with the output end of the operational amplifier D26B; the operational amplifier D26B is used for outputting an analog voltage Uo0 of 0-10V.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model discloses a power supply circuit uses the component few, the circuit is stable, the price is low, exportable adjustable constant current, and subsequent detection circuitry can be with the analog voltage value of the vibration numerical value conversion of IEPE sensor different ranges, provides follow-up analytical equipment, has with low costs, the current stabilization is adjustable, exports optional characteristics.
Compared with the prior art, the utility model, its supply circuit stabilivolt cooperation triode's mode realizes that the circuit is simple, can be continuously adjustable in 2-20mA within range through adjustable potentiometre output current, has avoided the current deviation that traditional mirror image source circuit arouses because of manufacturing process.
3. The utility model discloses a signal detection circuit will contain DC offset's vibration signal conversion and become the analog voltage value that does not contain biased suitable different ranges, has increased the limit value circuit simultaneously, has avoided the signal unusual to cause the signal amplitude transfinite and damage follow-up analog voltage circuit's risk.
Drawings
FIG. 1 is a power supply circuit diagram of an IEPE interface;
fig. 2 is a circuit diagram of an IEPE interface detection circuit.
Detailed Description
In this embodiment, a power supply and detection circuit of a two-wire system IEPE interface includes: a power supply circuit and a detection circuit;
as shown in fig. 1, the power supply circuit includes: a voltage stabilizing diode, an adjustable potentiometer, a resistor and a triode;
one end of the resistor is connected with one end and an adjustable end of the adjustable potentiometer respectively and then is connected with an external power supply, the other end of the adjustable potentiometer is connected with an emitting electrode of the triode, and a collector of the triode is used as an output end of the power supply circuit and used for supplying power for an external IEPE sensor; the base electrode of the triode and the negative electrode of the voltage stabilizing diode V56 are both connected with the other end of the resistor; the anode of the zener diode V56 is grounded. The external power supply is 24V, the voltage stabilizing value of a voltage stabilizing tube V56 is 22V, the voltage drop of a resistor R263 = the voltage drop of a potentiometer + the voltage drop of a triode Vbe =24-22=2V, wherein the voltage drop of the triode Vbe is 0.7V fixed value. When the triode P47 works in an amplification region, the resistance value of the potentiometer RP21 is adjusted, the output current can be adjusted within 2-20mA at will, and the power supply current requirements of different IEPE sensors are met.
The IEPE sensor outputs a vibration signal as an ac signal at a 12V bias voltage. Therefore, in the detection of the vibration signal, first, the dc offset is removed to obtain an ac signal representing the vibration. The output limit circuit prevents the output signal from damaging the subsequent analog input circuit. The output circuit is additionally provided with an amplifying circuit for amplifying output voltage, so that the voltage is suitable for a subsequent analog input circuit with a larger range.
As shown in fig. 2, the detection circuit includes: the circuit comprises a direct current bias removing circuit, an output limit value circuit and an amplifying circuit; the output limit circuit is a voltage stabilizing diode V69, and in order to prevent signal abnormality, the output limit circuit is used for enabling the analog voltage to be in a range of 0-5V;
the DC bias removing circuit for removing the 12V bias voltage in the vibration signal comprises: five resistors, one operational amplifier D26A and a zener diode V68;
the anode of the operational amplifier D26A is connected to one end of the resistor R300 and one end of the resistor R301, respectively, and the other end of the resistor R300 is connected to the output end of the external IEPE sensor; the other end of the resistor R301 is grounded;
the cathode of the operational amplifier D26A is connected to one end of the resistor R298 and one end of the resistor R299, respectively; the other end of the resistor R298 is connected to one end of the resistor R297 and the cathode of the zener diode V68, respectively; the anode of the zener diode V68 is grounded; the other end of the resistor R297 is connected with an external power supply;
the output end of the operational amplifier D26A is respectively connected with the other end of the resistor R299 and the cathode of the voltage stabilizing diode V69, and the anode of the voltage stabilizing diode V69 is grounded;
the analog voltage Uo1 is used for outputting 0-5V;
in order to adapt to different analog voltage ranges, an amplifying circuit is added at the output end of the D26A to amplify the output voltage of 0-5V into 0-10V. The amplifying circuit includes three resistors and an operational amplifier D26B;
the anode of the operational amplifier D26B is connected to the output terminal of the operational amplifier D26A through the resistor R302;
the cathode of the operational amplifier D26B is connected to one end of the resistor R303 and one end of the resistor R304, respectively; the other end of the resistor R303 is grounded; the other end of the resistor R304 is connected to the output end of the operational amplifier D26B; the operational amplifier D26B is used to output an analog voltage Uo0 of 0 to 10V.
The power supply and detection circuit of the two-wire system IEPE interface in this embodiment can provide a constant current power supply for the two-wire system IEPE sensor, and convert an output value of the IEPE sensor into a selectable analog voltage value of 0-5V/0-10V through the detection circuit, so as to provide an analog voltage with a suitable range for subsequent analog processing.
Claims (1)
1. A power supply and detection circuit of a two-wire system IEPE interface is characterized by comprising: a power supply circuit and a detection circuit;
the power supply circuit includes: a voltage stabilizing diode, an adjustable potentiometer, a resistor and a triode;
one end of the resistor is connected with one end and an adjustable end of the adjustable potentiometer respectively and then is connected with an external power supply, the other end of the adjustable potentiometer is connected with an emitting electrode of the triode, and a collector of the triode is the output end of the power supply circuit and is used for supplying power for an external IEPE sensor; the base electrode of the triode and the negative electrode of the voltage stabilizing diode V56 are both connected with the other end of the resistor; the anode of the voltage-stabilizing diode V56 is grounded;
the detection circuit includes: the circuit comprises a direct current bias removing circuit, an output limit value circuit and an amplifying circuit; the output limit value circuit is a voltage stabilizing diode V69;
the dc offset removal circuit includes: five resistors, one operational amplifier D26A and a zener diode V68;
the anode of the operational amplifier D26A is connected to one end of the resistor R300 and one end of the resistor R301, respectively, and the other end of the resistor R300 is connected to the output end of the external IEPE sensor; the other end of the resistor R301 is grounded;
the cathode of the operational amplifier D26A is connected to one end of the resistor R298 and one end of the resistor R299, respectively; the other end of the resistor R298 is connected with one end of the resistor R297 and the cathode of the zener diode V68, respectively; the anode of the voltage stabilizing diode V68 is grounded; the other end of the resistor R297 is connected with the external power supply;
the output end of the operational amplifier D26A is respectively connected with the other end of the resistor R299 and the cathode of a voltage stabilizing diode V69, and the anode of the voltage stabilizing diode V69 is grounded; the operational amplifier D26A is used for outputting an analog voltage Uo1 of 0-5V;
the amplifying circuit comprises three resistors and an operational amplifier D26B;
the anode of the operational amplifier D26B is connected with the output end of the operational amplifier D26A through a resistor R302;
the cathode of the operational amplifier D26B is connected to one end of the resistor R303 and one end of the resistor R304, respectively; the other end of the resistor R303 is grounded; the other end of the resistor R304 is connected with the output end of the operational amplifier D26B; the operational amplifier D26B is used for outputting an analog voltage Uo0 of 0-10V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222899259.7U CN218301232U (en) | 2022-11-01 | 2022-11-01 | Power supply and detection circuit of two-wire system IEPE interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222899259.7U CN218301232U (en) | 2022-11-01 | 2022-11-01 | Power supply and detection circuit of two-wire system IEPE interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218301232U true CN218301232U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222899259.7U Active CN218301232U (en) | 2022-11-01 | 2022-11-01 | Power supply and detection circuit of two-wire system IEPE interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218301232U (en) |
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- 2022-11-01 CN CN202222899259.7U patent/CN218301232U/en active Active
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