CN214308851U

CN214308851U - Multifunctional detection bridge circuit, probe and sensor

Info

Publication number: CN214308851U
Application number: CN202120121410.7U
Authority: CN
Inventors: 徐胜国
Original assignee: Shanghai Green Page Technology Development Co ltd
Current assignee: Shanghai Green Page Technology Development Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-09-28
Anticipated expiration: 2031-01-18

Abstract

The utility model discloses a multi-functional detection bridge circuit and probe and sensor, including sensing element, sensing element detection bridge circuit and leading sensing probe circuit, sensing element detects the bridge circuit including detecting bridge temperature compensation resistance R5', bridge circuit output sensitivity trimming resistance R5, resistance R1, resistance R2, resistance R3, resistance R4, wiring end 1, wiring end 2, wiring end 3, wiring end 4 and power E, power E's output is connected with respectively detects bridge temperature compensation resistance R5' and bridge circuit output sensitivity trimming resistance R5, power E's output is connected with respectively detects bridge temperature compensation resistance R5' and bridge circuit output sensitivity trimming resistance R5 and inserts wiring end 1 jointly through the wire. In the utility model, various sensitive elements can be effectively detected on the multifunctional detection bridge; the TNC thermistor of the multifunctional detection bridge circuit has the temperature compensation function on the detection bridge circuit; the R5 resistor in the multi-function sense bridge has a fine tuning output function.

Description

Multifunctional detection bridge circuit, probe and sensor

Technical Field

The utility model relates to an application technical field of multi-functional detection bridge circuit specifically is multi-functional detection bridge circuit and probe and sensor.

Background

Currently, as sensor technology advances, in addition to the conventional mode sensor, the conventional mode sensor is upgraded and innovated and miniaturized. The wireless remote sensing control system takes a mobile phone and a computer terminal as control interfaces, and also has come into play.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-functional detection bridge circuit and probe and sensor to the narrower problem of range of application who proposes traditional mode sensor among the above-mentioned background art is solved.

In order to achieve the above object, the utility model provides a following technical scheme: the multifunctional detection bridge circuit, the probe and the sensor comprise a sensing element, a sensing element detection bridge circuit and a front sensing probe circuit, wherein the sensing element detection bridge circuit comprises a detection bridge temperature compensation resistor R5', a bridge output sensitivity trimming resistor R5, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a terminal 1, a terminal 2, a terminal 3, a terminal 4 and a power supply E, the output end of the power supply E is respectively connected with a detection bridge temperature compensation resistor R5' and a bridge output sensitivity trimming resistor R5, the output end of the power supply E is respectively connected with a detection bridge temperature compensation resistor R5' and a bridge output sensitivity trimming resistor R5 which are jointly connected with the terminal 1 through wires, two wires led out from the terminal 1 are respectively connected with the resistor R1 and the resistor R4, the other end of the resistor R1 is connected with the terminal 2 through a wire, and the other wire led out from the terminal 2 is connected with a resistor R2, and the resistor R2 is connected with the terminal 3 through a lead, the other end of the resistor R4 is connected with the terminal 4 through a lead, the other lead of the terminal 4 is led out to be connected with the resistor R3, the resistor R3 is connected with the other end of the terminal 3 through a lead, and the input end of the terminal 3 is connected with the negative electrode of the power supply E.

Preferably, the sensitive element is one or both of a photosensitive element and an NTC thermosensitive element.

Preferably, the end part of the front sensing probe circuit is provided with four pins, namely a pin 1, a pin 2, a pin 3 and a pin 4.

Preferably, the multifunctional detection bridge circuit, the probe and the sensor further comprise a resistor Rt, a resistor Rn and a resistor RL, wherein the resistor Rt is one or more of a resistor R1', a resistor R2', a resistor R3 'and a resistor R4', the resistor Rn is one or more of a resistor R1, a resistor R2, a resistor R3 and a resistor R4, and the resistor RL is an equivalent inductor in the sensor system.

Preferably, the multifunctional detection bridge circuit, the probe and the sensor are additionally provided with a thermosensitive element R1', a thermosensitive element R2', a thermosensitive element R3 'and a thermosensitive element R4'.

Compared with the prior art, the beneficial effects of the utility model are as follows:

various sensitive elements can be effectively detected on the multifunctional detection bridge;

the TNC thermistor of the multifunctional detection bridge circuit has the temperature compensation function on the detection bridge circuit;

the R5 resistor of the multifunctional detection bridge circuit has the function of trimming output;

the working condition requirements of different levels of systems in the same sensing control process of the sensing probe and the requirements of the market on various sensor systems are met; the sensing control system is required to be highly sensitive, highly precise, low in power consumption, miniaturized, digitized in signal, wireless in communication and the like.

Drawings

FIG. 1 is a schematic circuit diagram of the sensing and detecting probe of the weak sensitive element of the present invention;

FIG. 2 is an equivalent schematic diagram of the NTC thermosensitive element temperature compensation sensing detection bridge circuit of the present invention;

FIG. 3 is a schematic diagram of the NTC thermosensitive element temperature compensation sensing detection bridge circuit temperature probe of the present invention;

fig. 4 is a schematic diagram of the sensor control system of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Embodiment 1

Referring to fig. 1-4, the present invention provides a technical solution: the multifunctional detection bridge circuit, the probe and the sensor comprise a sensing element, a sensing element detection bridge circuit and a front sensing probe circuit, wherein the sensing element detection bridge circuit comprises a detection bridge temperature compensation resistor R5', a bridge output sensitivity trimming resistor R5, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a terminal 1, a terminal 2, a terminal 3, a terminal 4 and a power supply E, the output end of the power supply E is respectively connected with a detection bridge temperature compensation resistor R5' and a bridge output sensitivity trimming resistor R5, the output end of the power supply E is respectively connected with a detection bridge temperature compensation resistor R5' and a bridge output sensitivity trimming resistor R5 which are jointly connected with the terminal 1 through wires, two wires led out from the terminal 1 are respectively connected with the resistor R1 and the resistor R4, the other end of the resistor R1 is connected with the terminal 2 through a wire, and the other wire led out from the terminal 2 is connected with a resistor R2, and the resistor R2 is connected with the terminal 3 through a lead, the other end of the resistor R4 is connected with the terminal 4 through a lead, the other lead of the terminal 4 is led out to be connected with the resistor R3, the resistor R3 is connected with the other end of the terminal 3 through a lead, and the input end of the terminal 3 is connected with the negative electrode of the power supply E.

The sensitive element is one or two of a photosensitive element and an NTC thermosensitive element, and the

legs

1 and 2 of the photosensitive element correspond to the measuring bridges connected with the

terminals

1 and 2 respectively.

The end part of the front sensing probe circuit is provided with four pins which are a pin 1, a pin 2, a pin 3 and a pin 4 in sequence, wherein the pin 1, the pin 2, the pin 3 and the pin 4 are respectively connected with a wiring end 1, a wiring end 2, a wiring end 3 and a wiring end 4 in a one-to-one correspondence mode.

Example II

Referring to fig. 2, the NTC thermal element temperature compensation sensing detection bridge circuit includes a resistor Rt, a resistor Rn and a resistor RL, the resistor Rt is one or more of a resistor R1', a resistor R2', a resistor R3 'and a resistor R4', the resistor Rn is one or more of a resistor R1, a resistor R2, a resistor R3 and a resistor R4, and the RL is equivalent inductance in a sensor system.

The NTC thermal sensitive element temperature compensation sensing detection bridge circuit is equivalent to FIG. 2, wherein RL is equivalent inductance in a sensor system, such as AC-DC, and RL equivalent inductance is larger as the inductance value in a DC-DC voltage-stabilized power supply is higher in temperature.

Rn in the graph is resistance in the system, and the higher the temperature, the larger the resistance value of Rn is, the positive temperature coefficient is presented. In some electronic products, some electronic components with positive and negative temperature coefficients are used, and taking resistance as an example, the positive temperature coefficient increases with temperature, the resistance value increases, and the negative temperature coefficient is just opposite. The resistance in the sensing detection bridge circuit is kept constant when RL + Rn in the sensing system changes at the temperature of 0-70 ℃. The NTC is a thermosensitive element with a negative temperature coefficient, so that the temperature in the sensing control system is effectively compensated. This maintains linearity and high accuracy of the output data from the sense bridge.

Example three

Referring to fig. 3, the NTC thermal element temperature compensation sensing detection bridge temperature probe is additionally provided with a thermal element R1', a thermal element R2', a thermal element R3 'and a thermal element R4' based on the multifunctional detection bridge;

the NTC heat-sensitive element and the sensing detection bridge circuit form a temperature probe, and the temperature sensor can be used as a measuring element (such as measuring temperature, flow rate, liquid level and the like), a control element (such as a heat-sensitive switch and a current limiter) and a circuit compensation element. The NTC thermistor is widely applied to various fields of household appliances, power industry, communication, military science, space navigation and the like, and has extremely wide development prospect.

Example four

Referring to fig. 4, the sensor control system is composed of any one of the sensing element, the sensing element detection bridge circuit, the universal sensor module, the microcomputer digital display sensing controller or the WIFI digital display sensing control system.

Example five

Referring to fig. 4, the sensor control system is composed of any one of the sensing element detection bridge circuit, the photosensitive element, the front sensing probe circuit, the universal sensor module, the microcomputer digital display sensing controller or the WIFI digital display sensing control system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The multifunctional detection bridge circuit, the probe and the sensor comprise a sensing element, a sensing element detection bridge circuit and a front sensing probe circuit, and are characterized in that: the sensitive element detection bridge circuit comprises a detection bridge temperature compensation resistor R5', a bridge circuit output sensitivity trimming resistor R5, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a terminal 1, a terminal 2, a terminal 3, a terminal 4 and a power supply E, wherein the output end of the power supply E is respectively connected with a detection bridge temperature compensation resistor R5' and a bridge circuit output sensitivity trimming resistor R5, the output end of the power supply E is respectively connected with a detection bridge temperature compensation resistor R5' and a bridge circuit output sensitivity trimming resistor R5 which are commonly connected to the terminal 1 through conducting wires, two conducting wires led out from the terminal 1 are respectively connected with the resistor R1 and the resistor R4, the other end of the resistor R1 is connected to the terminal 2 through a conducting wire, the other conducting wire led out from the terminal 2 is connected with the resistor R2, the resistor R2 is connected to the terminal 3 through a conducting wire, and the other end of the resistor R4 is connected to the terminal 4 through a conducting wire, another wire is led out from the terminal 4 and connected with the resistor R3, the resistor R3 is connected to the other end of the terminal 3 through a wire, and the input end of the terminal 3 is connected to the negative electrode of the power supply E.

2. The multifunctional sensing bridge and probe and transducer of claim 1, wherein: the sensitive element is one or two of a photosensitive element or an NTC thermosensitive element.

3. The multifunctional sensing bridge and probe and transducer of claim 1, wherein: the end part of the front sensing probe circuit is provided with four pins, namely a pin 1, a pin 2, a pin 3 and a pin 4.

4. The multifunctional sensing bridge and probe and transducer of claim 1, wherein: the sensor further comprises a resistor Rt, a resistor Rn and a resistor RL, wherein the resistor Rt is one or more of a resistor R1', a resistor R2', a resistor R3 'and a resistor R4', the resistor Rn is one or more of a resistor R1, a resistor R2, a resistor R3 and a resistor R4, and the resistor RL is equivalent inductance in the sensor system.

5. The multifunctional sensing bridge and probe and transducer of claim 1, wherein: a thermosensitive element R1', a thermosensitive element R2', a thermosensitive element R3 'and a thermosensitive element R4' are also added.