CN220915168U - Multichannel transmitter for multichannel Hall sensor - Google Patents

Abstract

The utility model discloses a multi-channel transmitter for multi-channel Hall sensors, including: an AC/DC voltage-stabilized power supply module and a multi-channel signal connection board, wherein the AC/DC voltage-stabilized power supply module converts 220V mains electricity into a DC voltage-stabilized power supply required by the Hall sensor, the multi-channel signal connection board is composed of a number of 3-core aviation connectors and BNC connectors, and is used to provide a DC voltage-stabilized power supply and transmit measurement signals for multiple Hall sensors, the 3-core aviation connector is used to connect the Hall sensor, and the BNC connector is used to connect the test equipment, the transmitter housing is divided into an upper panel and a shell, the multi-channel signal connection board is made of an insulating board directly used as the upper panel of the transmitter, and the AC/DC voltage-stabilized power supply module is installed inside the transmitter shell made of aluminum alloy, and the aluminum alloy shell is directly used for heat dissipation. The utility model has a simple design, convenient wiring, and high reliability.

Description

Multi-channel transmitter for multiple Hall sensors

Technical Field

The utility model belongs to the field of electronic technology, and in particular relates to a multi-channel transmitter for multi-channel Hall sensors.

Background technique

In recent years, Hall sensors have been widely used in military and civilian fields such as aviation, aerospace, and communications due to their good accuracy and linearity, wide bandwidth, fast response, strong overload capacity, no insertion loss, high reliability, low power consumption, and easy maintenance and replacement. Hall sensors require a DC power supply to work properly. This power supply voltage must be within the range specified by the sensor. If it exceeds this range, the sensor will not work properly or the reliability will be reduced. The power supply voltage of the Hall sensor can use a single power supply, such as +5V, +12V or +24V, or a positive and negative bipolar power supply, such as ±12V, ±15V or ±24V. In practical applications, it is often necessary to use several Hall current sensors at the same time. If each Hall sensor is equipped with a separate power supply, the on-site wiring will be complicated.

The switching power supply has many advantages such as high efficiency and energy saving, strong ability to adapt to changes in mains electricity, wide adjustable output voltage range, small size, light weight, etc. It is widely used in various fields such as computers, communications, aerospace, and national defense. However, the disadvantage of the switching power supply is that there is a relatively serious switching interference. If these interferences are not suppressed, eliminated, and shielded, they will seriously affect the normal operation of Hall sensors and test equipment. In addition, since the switching power supply oscillator is not isolated by the power frequency transformer, these interferences will be connected to the power frequency power grid, causing serious interference to other nearby electronic instruments, equipment, and household appliances.

Utility Model Content

The utility model aims to solve the problem of complicated power supply wiring and test wiring when using multi-channel Hall sensors, and provides a multi-channel transmitter for multi-channel Hall sensors, which can greatly simplify the complexity of power supply and test wiring and improve work efficiency and reliability.

The technical solution adopted by the utility model to solve the above problems is:

A multi-channel transmitter for multi-channel Hall sensors comprises a shell, an AC/DC voltage-stabilized power supply module and a multi-channel signal connection board, wherein the multi-channel signal connection board serves as an upper panel of the shell, and the AC/DC voltage-stabilized power supply module is installed inside the shell, filters a 220V AC voltage, performs AC/DC conversion and DC filtering and voltage stabilization, outputs the DC voltage required by the Hall sensor, and is connected to the Hall sensor via the multi-channel signal connection board.

Furthermore, the AC/DC regulated power supply module includes an AC input circuit, an AC/DC module and a DC output circuit. The AC input circuit is used to filter and stabilize the 220V AC voltage, and its output is connected to the input end of the AC/DC module. The AC/DC module is used for AC/DC conversion, and the DC output circuit is used to filter and stabilize the DC voltage output by the AC/DC module.

Furthermore, the AC input circuit includes an input terminal, a common-mode choke, an X-type safety capacitor, and a bidirectional TVS diode. The two pins of the input terminal are respectively connected to the live wire and the neutral wire of the 220V AC voltage. The common-mode choke is composed of two coils of the same size and the same number of turns symmetrically wound on the same ferrite ring core, wherein two pins are connected to the live wire and two pins are connected to the neutral wire. The X-type safety capacitor is connected between the neutral wire and the live wire. The common-mode choke and the X-type safety capacitor form an LC filter. The bidirectional TVS diode is connected in parallel with the X-type safety capacitor.

Further, the DC output circuit includes a first voltage regulator diode, a second voltage regulator diode, a first tantalum electrolytic capacitor, a second tantalum electrolytic capacitor, a first ceramic capacitor, a second ceramic capacitor, a first inductor and a second inductor. The cathode of the first voltage regulator diode and one end of the first inductor are connected to the +V pin of the AC/DC module. The anode of the first voltage regulator diode, one end of the first tantalum electrolytic capacitor, one end of the first ceramic capacitor, the cathode of the second voltage regulator diode, one end of the second tantalum electrolytic capacitor and one end of the second ceramic capacitor are commonly connected to the GND pin of the AC/DC module. The other end of the first inductor is connected to the other end of the first tantalum electrolytic capacitor and the other end of the first ceramic capacitor. The anode of the second voltage regulator diode and one end of the second inductor are commonly connected to the -V pin of the AC/DC module. The other end of the second inductor is connected to the other end of the second tantalum electrolytic capacitor and the other end of the second ceramic capacitor. The first inductor, the second inductor, the first tantalum electrolytic capacitor, the second tantalum electrolytic capacitor, the first ceramic capacitor and the second ceramic capacitor form an LC filter.

Furthermore, the AC/DC module adopts a single power supply with corresponding voltage value or a dual power supply with positive and negative polarity. The output voltage of the single power supply adopts but is not limited to +5V, +12, +15V or +24V, and the dual power supply with positive and negative polarity adopts but is not limited to ±12V, ±15 or ±24V.

Furthermore, the upper panel is made of insulating material, and the shell is made of aluminum alloy material.

Furthermore, the AC/DC module is mounted on the bottom of the housing, and the mounting contact surface is coated with thermal conductive silicone grease.

Furthermore, the multi-channel signal connection board includes several 3-core aviation connectors and BNC connectors, the 3-core aviation connector is connected to the Hall current sensor, and the measurement signal of the Hall sensor is connected to the positive pole of the corresponding BNC connector output terminal, and the BNC connector is connected to the test equipment.

Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

(1) The multi-channel transmitter provided by the utility model is suitable for application scenarios of multiple Hall sensors, which can greatly simplify the complexity of Hall sensor power supply and test connection, and improve work efficiency and reliability.

(2) The method of the utility model is concise and practical, easy to connect and convenient to use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a multi-channel transmitter for a multi-channel Hall current sensor according to the present invention;

FIG. 2 is a schematic diagram of the appearance of a multi-channel transmitter for a multi-channel Hall current sensor of the present invention.

FIG3 is a wiring diagram of a multi-channel transmitter and a Hall current sensor for a multi-channel Hall current sensor according to the present invention.

Detailed ways

The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

The following examples are for explaining the present invention, but the present invention is not limited to the following embodiments, and the pin names are not limited to these examples.

The terms “one way”, “one end” and “the other end” mentioned in this article are for the convenience of description and are not limitations of this circuit.

As shown in Figure 1, the utility model is a multi-channel transmitter for multi-channel Hall current sensors, including an AC/DC voltage-stabilized power supply module and a multi-channel signal connection board; the AC/DC voltage-stabilized power supply module converts 220V mains electricity into the required DC voltage; the 3-core aviation connector of the multi-channel signal connection board supplies power to multiple Hall sensors, and connects the measurement signal to the test instrument through the corresponding BNC connector.

The AC/DC voltage-stabilized power supply module consists of an AC/DC module PS1, an AC input filter circuit (composed of an input terminal J1, a common-mode choke coil L1, an X-type safety capacitor C1, and a bidirectional TVS diode D1) and a DC output filter circuit (composed of diodes D2-D3, capacitors C2-C5, and inductors L2-L3).

The AC input filter circuit of the AC/DC voltage-stabilized power supply module includes a common-mode choke L1, an X-type safety capacitor C1, a bidirectional TVS diode D1 and an input terminal J1. Pins 1 and 2 of the input terminal J1 are respectively connected to the live wire and the neutral wire of the 220V mains. The common-mode choke L1 and the X-type safety capacitor C1 form an LC filter to filter the input 220V industrial frequency alternating current. Among them, the common-mode choke L1 is composed of two coils of the same size and the same number of turns symmetrically wound on the same ferrite toroidal core, with pins 1 and 2 connected to the live wire, and pins 3 and 4 connected to the neutral wire, which are used to suppress the common-mode interference signal in the circuit and isolate it from the input 220V industrial frequency alternating current; the X-type safety capacitor C1 is connected between the neutral wire and the live wire, and plays the role of differential mode filtering in the circuit. The bidirectional TVS diode D1 is connected between the neutral line and the live line, and is an overvoltage surge protection device that can withstand reverse voltage shock in a very short time, so that the voltage between the neutral line and the live line is clamped at 220V to avoid shocking the subsequent circuits.

The AC/DC power supply module PS1 of the AC/DC voltage-stabilized power supply module is installed inside the aluminum alloy shell, and thermal grease is applied to the installation contact surface to directly use the aluminum alloy shell to dissipate heat. According to the power supply voltage requirement of the Hall sensor, the AC/DC power supply module PS1 selects to use a single power supply with a corresponding voltage value or a dual power supply with positive and negative polarity. The output voltage of the single power supply can be selected but not limited to +5V, +12, +15V or +24V, and the dual power supply with positive and negative polarity can be selected but not limited to ±12V, ±15 or ±24V. The input terminals L and N of the AC/DC power supply module PS1 are respectively connected to the L and N terminals of the AC input filter circuit; the output terminals +V, GND and -V are respectively connected to the +V, GND and -V terminals of the DC output filter circuit.

The DC output filter circuit of the AC/DC voltage-stabilized power supply module is composed of diodes D2-D3, capacitors C2-C5, and inductors L2-L3, which filter the DC voltage output by the power supply module PS1. The D2 and D3 are voltage-stabilizing diodes, which are used to keep the voltage at both ends of the load stable, wherein: the negative pole of D2 is connected to +V, the positive pole is connected to GND, the negative pole of D3 is connected to GND, and the positive pole is connected to -V. The L2 and L3 are power inductors, which form an LC filter with the capacitors C2-C5; wherein, the C2 and C4 are tantalum electrolytic capacitors, which are used to filter low-frequency noise; the C3 and C5 are ceramic capacitors, which are used to filter high-frequency noise. One end of the inductor L2 is connected to +V, and the other end is connected to one end of the capacitors C2 and C3 in parallel, forming an LC filter to filter the positive voltage circuit; one end of the inductor L3 is connected to -V, and the other end is connected to one end of the capacitors C4 and C5 in parallel, forming an LC filter to filter the negative voltage circuit to suppress interference signals and reduce output voltage ripple. If the power supply voltage of the Hall sensor is a single power supply, the AC/DC module PS1 uses a single power supply, and no negative voltage circuit is required.

The shell of the multi-channel transmitter is divided into two parts: an upper panel and a shell. The multi-channel signal connection board is directly used as the upper panel of the transmitter shell. The material is an insulating board, which is used to connect the user's Hall sensor and test equipment; the AC/DC regulated power supply module is installed inside the shell, and directly uses the aluminum alloy shell to dissipate heat. Its function is to filter the 220V mains power, perform AC-DC conversion and DC filtering and voltage stabilization, and output the DC voltage required by the Hall sensor.

The utility model has the advantages of simple design, convenient wiring and high reliability.

The specification of the utility model has given a full description of the content of the utility model. The specific parameters of each component can be set according to actual needs, and ordinary technicians are sufficient to implement it through the content of the utility model specification. Within the framework of the claims, any improvement based on the idea of the utility model belongs to the scope of the rights of the utility model.

Claims (8)

1. A multi-channel transmitter for multi-channel Hall sensors, characterized in that it includes a shell, an AC/DC voltage-stabilized power supply module and a multi-channel signal connection board, wherein the multi-channel signal connection board serves as the upper panel of the shell, and the AC/DC voltage-stabilized power supply module is installed inside the shell, and performs AC/DC conversion and DC filtering and voltage stabilization after filtering the 220V AC voltage, outputs the DC voltage required by the Hall sensor, and is connected to the Hall sensor through the multi-channel signal connection board. 2. The multi-channel transmitter according to claim 1 is characterized in that: the AC/DC regulated power supply module includes an AC input circuit, an AC/DC module (PS1) and a DC output circuit, the AC input circuit is used to filter and stabilize the 220V AC voltage, and its output is connected to the input end of the AC/DC module (PS1), the AC/DC module (PS1) is used for AC/DC conversion, and the DC output circuit is used to filter and stabilize the DC voltage output by the AC/DC module (PS1). 3. The multi-channel transmitter according to claim 2 is characterized in that: the AC input circuit includes an input terminal (J1), a common mode choke (L1), an X-type safety capacitor (C1), and a bidirectional TVS diode (D1), the two pins of the input terminal (J1) are respectively connected to the live wire and the neutral wire of the 220V AC voltage, the common mode choke (L1) is composed of two coils of the same size and the same number of turns symmetrically wound on the same ferrite ring core, two of which are connected to the live wire and two are connected to the neutral wire, the X-type safety capacitor (C1) is connected between the neutral wire and the live wire, the common mode choke (L1) and the X-type safety capacitor (C1) form an LC filter, and the bidirectional TVS diode (D1) is connected in parallel with the X-type safety capacitor (C1). 4. The multi-channel transmitter according to claim 2 is characterized in that: the DC output circuit comprises a first voltage-stabilizing diode (D2), a second voltage-stabilizing diode (D3), a first tantalum electrolytic capacitor (C2), a second tantalum electrolytic capacitor (C4), a first ceramic capacitor (C3), a second ceramic capacitor (C5), a first inductor (L2) and a second inductor (L3), the cathode of the first voltage-stabilizing diode (D2) and one end of the first inductor (L2) are connected to the +V pin of the AC/DC module (PS1), the anode of the first voltage-stabilizing diode (D2), one end of the first tantalum electrolytic capacitor (C2), one end of the first ceramic capacitor (C3), the cathode of the second voltage-stabilizing diode (D3), one end of the second tantalum electrolytic capacitor (C4), and the second ceramic capacitor (C5) are connected to the +V pin of the AC/DC module (PS1). One end of the capacitor (C5) is commonly connected to the GND pin of the AC/DC module (PS1); the other end of the first inductor (L2) is connected to the other end of the first tantalum electrolytic capacitor (C2) and the other end of the first ceramic capacitor (C3); the positive electrode of the second voltage stabilizing diode (D3) and one end of the second inductor (L3) are commonly connected to the -V pin of the AC/DC module (PS1); the other end of the second inductor (L3) is connected to the other end of the second tantalum electrolytic capacitor (C4) and the other end of the second ceramic capacitor (C5); the first inductor (L2), the second inductor (L3) and the first tantalum electrolytic capacitor (C2), the second tantalum electrolytic capacitor (C4), the first ceramic capacitor (C3) and the second ceramic capacitor (C5) form an LC filter. 5. The multi-channel transmitter according to claim 2 is characterized in that: the AC/DC module (PS1) adopts a single power supply with corresponding voltage values or a dual power supply with positive and negative polarities, the output voltage of the single power supply adopts but is not limited to +5V, +12, +15V or +24V, and the dual power supply with positive and negative polarities adopts but is not limited to ±12V, ±15 or ±24V. 6. The multi-channel transmitter according to claim 1, characterized in that the upper panel is made of insulating material and the shell is made of aluminum alloy material. 7. The multi-channel transmitter according to claim 2, characterized in that: the AC/DC module (PS1) is installed at the bottom of the housing, and the installation contact surface is coated with thermal conductive silicone grease. 8. The multi-channel transmitter according to any one of claims 1 to 7 is characterized in that: the multi-channel signal connection board includes a plurality of 3-core aviation connectors and BNC connectors, the 3-core aviation connector is connected to the Hall current sensor, and the measurement signal of the Hall sensor is connected to the positive pole of the corresponding BNC connector output terminal, and the BNC connector is connected to the test equipment.