CN209313417U - A kind of Internet of Things intelligent data acquisition host - Google Patents

Abstract

The utility model discloses a kind of Internet of Things intelligent data acquisition hosts; it include: the battery being arranged in host; battery lotus root is connected to overvoltage crowbar, and the overvoltage crowbar includes: comparator, phase inverter, external power supply, the second NMOS tube, first resistor, triode, second resistance, third NMOS tube, the 4th resistance and the second PMOS tube；The supply voltage of the non-inverting input terminal connection battery of the comparator, the external reference voltage of the inverting input terminal of comparator, the power end of comparator connect external power supply, the ground terminal ground connection of comparator；By the way that overvoltage crowbar is arranged, disconnects the power supply of battery in time under overpressure situation, avoid the damage of data collection host, guarantee the normal operation of follow-up work, save maintenance cost；The operating power consumption of the overvoltage crowbar is low simultaneously, and at low cost, structure is simple, and circuit job stability is high, securely and reliably, makees switching tube using metal-oxide-semiconductor, more energy saving.

Description

A kind of Internet of Things intelligent data acquisition host

Technical field

The utility model belongs to data acquisition technology field, and in particular to a kind of Internet of Things intelligent data acquisition host.

Background technique

In today of internet industry fast development, data acquisition has been widely used in internet and distributed neck Domain, data collecting field have occurred that important variation.Firstly, the intelligent data acquisition system in distributed AC servo system application System at home and abroad has been achieved for significant progress, secondly, the quantity of bus compatible type data acquisition plug-in unit constantly increases, and it is a The quantity of the compatible data collection system of people's computer is also increasing, and the successive appearance of domestic and international various data gather computers will count A completely new epoch have been brought into according to acquisition.

Internet of Things intelligent data acquisition host, which has, to be acquired in real time, is automatically stored, instant playback, immediate feedback, locating automatically The functions such as reason and automatic transmission；Guarantee is provided for the authenticity of field data, validity, real-time, availability, has one The features such as body, mobility, small in size, light-weight and high-performance；Existing Internet of Things intelligent data acquisition host generallys use Storage battery power supply, when the power supply circuit of battery breaks down, the supply voltage of battery could possibly be higher than specified value, not have In the case where protecting circuit, the excessively high damage that will lead to data collection host of output voltage influences the progress of follow-up work, therefore To in data collection host battery carry out overvoltage protection be very it is necessary to.

Utility model content

To overcome technological deficiency of the existing technology, the utility model discloses a kind of Internet of Things intelligent data acquisition masters Machine.

Technical solution adopted by the utility model to solve its technical problems is a kind of Internet of Things intelligent data acquisition host, Include: the battery being arranged in host, battery lotus root is connected to overvoltage crowbar, the overvoltage crowbar include: comparator, Phase inverter, external power supply, the second NMOS tube, first resistor, triode, second resistance, third NMOS tube, the 4th resistance and second PMOS tube；

The supply voltage of the non-inverting input terminal connection battery of the comparator, the external benchmark of the inverting input terminal of comparator Voltage, the power end of comparator connect external power supply, the ground terminal ground connection of comparator, and the output end of comparator connects phase inverter Input terminal, the base stage of the output end connecting triode of phase inverter, the grid of collector the second NMOS tube of connection of triode, second The source electrode of NMOS tube is grounded, and the drain electrode of the second NMOS tube connects battery voltage end, the emitter of triode by first resistor Ground connection, the collector of triode connect the drain electrode of the second NMOS tube by second resistance, and the collector of triode is also connected with third The drain electrode of NMOS tube, the source electrode ground connection of third NMOS tube, the drain electrode of third NMOS tube connect battery voltage by the 4th resistance The grid at end, third NMOS tube connects drain electrode, and the drain electrode of third NMOS tube is also connected with the grid of the second PMOS tube, the second PMOS tube Drain electrode connect battery voltage end, the source electrode of the second PMOS tube is power output end connection load.

Preferably, 3rd resistor is also connected between the collector of the triode and the drain electrode of third NMOS tube.

Preferably, electrostatic discharge protection circuit, electrostatic are also connected between the output end of the phase inverter and the base stage of triode Protection circuit includes the first PMOS tube and the first NMOS tube；The source electrode of first PMOS tube connects external power supply, the first PMOS The output end of the drain electrode connection phase inverter of pipe, the grid of the first PMOS tube are separately connected the output end and external power supply of phase inverter, The output end of phase inverter is also connected with the drain electrode of the first NMOS tube, and the source electrode ground connection of the first NMOS tube, the grid of the first NMOS tube is also It is separately connected the output end and ground terminal of phase inverter.

Preferably, it is also connected with first capacitor between the grid of first PMOS tube and the output end of phase inverter, first The second capacitor is also connected between the grid of NMOS tube and the output end of phase inverter.

Preferably, the chip model that the comparator uses is LM193.

The beneficial effects of the utility model are: disconnecting electric power storage in time under overpressure situation by setting overvoltage crowbar The power supply in pond avoids the damage of data collection host, guarantees the normal operation of follow-up work, saves maintenance cost；The mistake simultaneously The operating power consumption of voltage protection circuit is low, at low cost, and structure is simple, and circuit job stability is high, securely and reliably, is made using metal-oxide-semiconductor Switching tube, it is more energy saving.

Detailed description of the invention

Fig. 1 is the circuit diagram of overvoltage crowbar described in the utility model.

Appended drawing reference: VB- battery voltage end, U- comparator, U0- reference voltage, VCC- external power supply, C- phase inverter, The first PMOS tube of P1-, C1- first capacitor, the first NMOS tube of N1-, the second capacitor of C2-, R1- first resistor, T1- triode, N2- Second NMOS tube, R2- second resistance, N3- third NMOS tube, the 4th resistance of R4-, the second PMOS tube of P2-, the output of UOUT- power supply End, R3- 3rd resistor.

Specific embodiment

More detailed description is done to the embodiments of the present invention below in conjunction with attached drawing and appended drawing reference, makes to be familiar with ability The technology people in domain can implement accordingly after studying this specification carefully.It should be appreciated that specific embodiment described herein is only to solve The utility model is released, is not used to limit the utility model.

A kind of Internet of Things intelligent data acquisition host, comprising: the battery being arranged in host, battery lotus root are connected to over-voltage guarantor Protection circuit, the overvoltage crowbar include: comparator U, phase inverter C, external power supply VCC, the second NMOS tube N2, first resistor R1, triode T1, second resistance R2, third NMOS tube N3, the 4th resistance R4 and the second PMOS tube P2；

The supply voltage VI of the non-inverting input terminal connection battery of the comparator U, the inverting input terminal of comparator U are external The power end of reference voltage U0, comparator U connect external power supply VCC, the ground terminal ground connection of comparator U, the output end of comparator U Connect the input terminal of phase inverter C, the base stage of the output end connecting triode T1 of phase inverter C, the collector connection the of triode T1 The grid of two NMOS tube N2, the source electrode ground connection of the second NMOS tube N2, the drain electrode of the second NMOS tube N2 are connected by first resistor R1 The emitter of battery voltage end VB, triode T1 are grounded, and the collector of triode T1 passes through second resistance R2 connection second The drain electrode of NMOS tube N2, the collector of triode T1 are also connected with the drain electrode of third NMOS tube N3, and the source electrode of third NMOS tube N3 connects The drain electrode on ground, third NMOS tube N3 is connected by the grid of the 4th resistance R4 connection battery voltage end VB, third NMOS tube N3 Drain electrode, the drain electrode of third NMOS tube N3 are also connected with the grid of the second PMOS tube P2, and the drain electrode of the second PMOS tube P2 connects battery The source electrode of voltage end VB, the second PMOS tube P2 are power output end UOUT connection load；

Specifically, the comparator U is used to carry out the supply voltage VI and reference voltage U0 on storage battery power supply main line Comparing, the reference voltage U0 is the voltage threshold of over-voltage, and supply voltage VI can be acquired by conventional sampling resistor, This is not repeated；

When if overvoltage condition, supply voltage VI is greater than reference voltage U0, and comparator U exports high level signal, high level Signal is converted to low level signal by phase inverter C, and triode T1 is NPN type triode, and the base stage of triode T1 receives low electricity Ordinary mail number cut-off, the grid of the second NMOS tube N2 is led by the high voltage signal that second resistance R2 receives battery voltage VB at this time Logical, since the conducting of the second NMOS tube N2 is grounded, the grid of third NMOS tube N3 receives low level signal and ends at this time, and second The grid of PMOS tube P2 receives the high voltage signal cut-off of battery voltage VB, at this time power output end UOUT Non voltage output, Battery is no longer the load supplyings such as Internet of Things intelligent data acquisition host, protect data collection host not by overvoltage condition and Damage；

If the voltage of battery is in normal condition, supply voltage VI is less than reference voltage U0, and comparator U is exported at this time Low level signal, low level signal are converted to high level signal by phase inverter C, and the base stage of triode T1 receives high level signal Conducting, since the conducting of triode T1 is grounded, the grid voltage of the second NMOS tube N2 is pulled low at this time, and the second NMOS tube N2 is cut Only, the grid of third NMOS tube N3 connects battery voltage VB, third NMOS tube N3 with first resistor R1 by second resistance R2 High level signal conducting is received, since the conducting of third NMOS tube N3 is grounded, the grid of the second PMOS tube P2 receives low electricity at this time Flat signal conduction, power output end UOUT normal output voltage, battery carry out normal power supply；

The operating power consumption of the overvoltage crowbar is low, at low cost, and structure is simple, and circuit job stability is high, securely and reliably, Make switching tube using metal-oxide-semiconductor, it is more energy saving.

3rd resistor R3 is also connected between the drain electrode of the collector and third NMOS tube N3 of the triode T1；Described Three resistance R3 are current-limiting resistance, improve circuit stability.

Electrostatic discharge protection circuit, electrostatic protection are also connected between the output end of the phase inverter C and the base stage of triode T1 Circuit includes the first PMOS tube P1 and the first NMOS tube N1；The source electrode of the first PMOS tube P1 connects external power supply VCC, and first PMOS tube P1 drain electrode connection phase inverter C output end, the grid of the first PMOS tube P1 be separately connected phase inverter C output end and External power supply VCC, the output end of phase inverter C are also connected with the drain electrode of the first NMOS tube N1, and the source electrode of the first NMOS tube N1 is grounded, the The grid of one NMOS tube N1 is also respectively connected with the output end and ground terminal of phase inverter C；The electrostatic discharge protection circuit is exactly to eliminate Electrostatic, improve pressure voltage, when human contact's chip, transient voltage be more than circuit normal working voltage when, PMOS tube and NMOS tube punctures simultaneously, provides access for transient current, makes internal circuit from overvoltage breakdown or the overheat of excess electric current It burns.

It is also connected with first capacitor C1 between the grid of the first PMOS tube P1 and the output end of phase inverter C, first The second capacitor C2 is also connected between the grid of NMOS tube N1 and the output end of phase inverter C；The electricity of the first capacitor C1 and second Hold the coupling speed that C2 is used to improve PMOS tube and NMOS tube, punctures metal-oxide-semiconductor as early as possible.

The chip model that the comparator U is used is LM193；LM193 has the advantages of low-power consumption, high sensitivity.

The above content is the further descriptions made in conjunction with specific preferred embodiment to the utility model, cannot recognize Determine specific embodiment of the present utility model to be only limited to these instructions.For the common skill of the utility model technical field For art personnel, the other embodiments obtained in the case where not departing from the technical solution of the utility model be should be included in practical In novel protection scope.

Claims (5)

1. a kind of Internet of Things intelligent data acquisition host, it is characterised in that: include: the battery being arranged in host, battery lotus root It is connected to overvoltage crowbar, the overvoltage crowbar includes: comparator U, phase inverter C, external power supply VCC, the second NMOS tube N2, first resistor R1, triode T1, second resistance R2, third NMOS tube N3, the 4th resistance R4 and the second PMOS tube P2；

The supply voltage VI of the non-inverting input terminal connection battery of the comparator U, the external benchmark of the inverting input terminal of comparator U The power end of voltage U0, comparator U connect external power supply VCC, the ground terminal ground connection of comparator U, the output end connection of comparator U The input terminal of phase inverter C, the base stage of the output end connecting triode T1 of phase inverter C, the collector connection second of triode T1 The grid of NMOS tube N2, the source electrode ground connection of the second NMOS tube N2, the drain electrode of the second NMOS tube N2 are stored by first resistor R1 connection The emitter of cell voltage end VB, triode T1 are grounded, and the collector of triode T1 passes through the 2nd NMOS of second resistance R2 connection The drain electrode of pipe N2, the collector of triode T1 are also connected with the drain electrode of third NMOS tube N3, and the source electrode of third NMOS tube N3 is grounded, the The drain electrode of three NMOS tube N3 connects drain electrode by the grid of the 4th resistance R4 connection battery voltage end VB, third NMOS tube N3, The drain electrode of third NMOS tube N3 is also connected with the grid of the second PMOS tube P2, and the drain electrode of the second PMOS tube P2 connects battery voltage end The source electrode of VB, the second PMOS tube P2 are power output end UOUT connection load.

2. a kind of Internet of Things intelligent data acquisition host as described in claim 1, it is characterised in that: the collection of the triode T1 3rd resistor R3 is also connected between electrode and the drain electrode of third NMOS tube N3.

3. a kind of Internet of Things intelligent data acquisition host as described in claim 1, it is characterised in that: the phase inverter C's is defeated It is also connected with electrostatic discharge protection circuit between outlet and the base stage of triode T1, electrostatic discharge protection circuit includes the first PMOS tube P1 and the One NMOS tube N1；The source electrode of the first PMOS tube P1 connects external power supply VCC, and the drain electrode of the first PMOS tube P1 connects phase inverter The output end of C, the grid of the first PMOS tube P1 are separately connected the output end and external power supply VCC of phase inverter C, and phase inverter C's is defeated Outlet is also connected with the drain electrode of the first NMOS tube N1, the source electrode ground connection of the first NMOS tube N1, and the grid of the first NMOS tube N1 is also distinguished Connect the output end and ground terminal of phase inverter C.

4. a kind of Internet of Things intelligent data acquisition host as claimed in claim 3, it is characterised in that: the first PMOS tube P1 Grid and phase inverter C output end between be also connected with first capacitor C1, the grid of the first NMOS tube N1 and phase inverter C's is defeated The second capacitor C2 is also connected between outlet.

5. a kind of Internet of Things intelligent data acquisition host as described in claim 1, it is characterised in that: the comparator U is used Chip model be LM193.