CN214373014U - Electric type composite pressure gauge - Google Patents

Abstract

The utility model discloses an electric type composite pressure gauge, its characterized in that includes electrical sensor and microprocessor, wherein electrical sensor experiences the pressure source and carries out temperature compensation, microprocessor is used for according to electrical sensor's sensing value controls digital display module and shows the current pressure value to step motor control pointer through driving the gear train indicates the current pressure value at the calibrated scale. The utility model discloses a combined type manometer uses electric formula sensor to gather the pressure of introducing and carry out temperature compensation, and output signal gives microprocessor. The microprocessor controls the stepping motor to drive the gear set, the pointer to match with the dial for indication and digital display of the current pressure value, and can output proportional current or voltage signals to external equipment. The system has the characteristics of high precision and small influence of high and low temperature, can output electric signals, and can monitor the state of system equipment, thereby greatly reducing the working intensity of operators.

Description

Electric type composite pressure gauge

Technical Field

The utility model belongs to the instrument field, concretely relates to take pointer to instruct and digital display to possess the electric type composite pressure meter of signal of telecommunication output.

Background

The existing pressure gauge is mainly a mechanical instrument, adopts a wrapping end pipe as a sensitive component, and drives a pointer to scale and indicate on a dial through gear transmission. The following problems mainly exist in the mechanical instrument: 1) the precision is low;

2) the indication error of the high-temperature and low-temperature links is large; 3) no electric signal is output, real-time monitoring cannot be carried out through other equipment, and the electric signal can be visually interpreted only through an operator; 4) the copper alloy material is poor in damp-heat resistance and salt spray resistance. The novel electric composite pressure gauge is urgently needed to be designed on the premise of ensuring the interpretation habit of an operator, and the display precision and reliability of the equipment in a severe working environment are improved.

SUMMERY OF THE UTILITY MODEL

In view of the above problem of the prior art, the utility model aims at providing an electric type composite pressure gauge, under the prerequisite of guaranteeing operating personnel's interpretation custom, can be under adverse circumstances real-time accurate electric type composite pressure gauge who shows.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides an electric type composite pressure gauge, includes electrical sensor and microprocessor, wherein electrical sensor experiences the pressure source and carries out temperature compensation, microprocessor is used for according to electrical sensor's sensing value, control digital display module shows current pressure value to through the step motor control pointer that drives the gear train at calibrated scale instruction current pressure value.

The gear set is connected with a potentiometer, and the potentiometer is used for feeding back a rotation angle signal of the gear set (or a pointer) to the microprocessor so as to monitor the pointer indication state.

The electric composite pressure gauge also comprises a fault warning lamp connected with the microprocessor and used for power-on self-checking and fault warning of the electric composite pressure gauge. The color of the fault warning lamp can adopt red, orange or other colors and is distributed on the dial.

The electric composite pressure gauge also comprises an electric connector of a voltage or current signal, and the electric connector is used for feeding back a pressure acquisition signal and the working state of the electric composite pressure gauge to a rear-end acquisition monitoring device (which can be an acquisition processing computer), so that real-time signal acquisition and recording are realized.

The scale of the dial scale can be arranged according to the required pressure range, precision, unit and angle, and color bands (such as red, yellow, orange and green) with different colors can be printed or sprayed on the outer ring of the reticle to assist the indication of operators.

The digital display module can be a liquid crystal screen, a nixie tube or other components, and can be distributed on the upper part, the lower part or the right part of the instrument panel according to habits and requirements.

Compare with current mechanical type manometer, the utility model discloses an electrical combined type manometer has following advantage:

1) and the accuracy grade is improved. The mechanical pressure gauge sold in the market adopts a capped tube as a sensitive element, and the precision grade is mostly 1.6 grade or 2.5 grade; the utility model discloses an electric combined type manometer adopts high accuracy electrical sensor (can be for goods shelves product) as sensing element, can realize pointer instruction and digital display simultaneously, and the precision can reach 0.5 level.

2) The pressure resistance is good. The high-precision electric sensor is adopted to replace a spring tube as a sensitive element, the pressure resistance is high, and abnormal indication caused by deformation and damage of the sensitive element under a large overpressure condition can be avoided.

3) The environmental suitability is good. The temperature compensation circuit is arranged in the sensor, so that the influence of temperature at high and low temperatures is small, and the display precision is higher than that of a mechanical pressure gauge;

4) the power-on self-checking device has a power-on self-checking function and an electric signal output function. The system can collect and monitor the annunciators, reduce the operation amount of personnel and reduce the working strength of the operators.

Drawings

Fig. 1 is a schematic diagram of an electrical composite pressure gauge according to an embodiment of the present invention;

fig. 2 is an example of a dial of the electrical composite pressure gauge of the present invention;

fig. 3 is a schematic diagram of an electrical sensor.

Detailed Description

The present invention will be described in more detail with reference to the accompanying drawings in conjunction with specific embodiments.

Fig. 1 is a schematic diagram of an electrical type composite pressure gauge according to an embodiment of the present invention. As shown in the figure, the electric composite pressure gauge mainly comprises an electric sensor part (comprising a pressure sensitive component, a temperature compensation module and an A/D sampling and operation circuit), an operation control part (a microprocessor), a servo system (a stepping motor and a gear set), a display part (a pointer and a dial, a fault warning lamp and a digital display module), a driving circuit, a power supply and a structural part.

When the electric type composite pressure gauge works:

introducing power from the electrical connector; the voltage converted into different specifications by the power supply assembly is supplied to the electric sensor, the microprocessor, the stepping motor and the digital display module.

The pressure source is introduced by a pressure pipeline, the electric sensor senses a pressure source signal, and the pressure source signal is subjected to temperature compensation, amplification and calibration and is output to the microprocessor after A/D conversion.

After receiving the sensing signal of the electric sensor, the microprocessor controls the stepping motor to rotate according to the received sensing signal, and the pointer indicates on the dial through the gear ratio of the gear set; meanwhile, the potentiometer which is driven by the gear set to synchronously rotate with the pointer outputs an electric signal, and the electric signal is fed back to the microprocessor after A/D conversion so as to judge whether the corner position of the pointer is correct or not; the microprocessor simultaneously outputs the sensing signals to a digital display module, and synchronously displays the pressure value indicated by the pointer;

when the electric composite pressure gauge is connected with a power supply, the power-on self-test is firstly carried out. When the power-on self-test finds out a fault, a pointer indication or a digital display fault, a fault warning lamp gives an alarm;

the electric connector of the voltage or current signal is used for feeding back a pressure acquisition signal and the working state of the electric composite pressure gauge to rear-end acquisition monitoring equipment (which can be an acquisition processing computer) so as to realize real-time signal acquisition and recording.

Display design:

a) the scale of the dial is arranged according to the required pressure range, precision, unit and angle, and color bands (such as red, yellow, orange and green) with different colors can be printed or sprayed on the outer ring of the reticle to assist the indication of an operator;

b) the digital display module can be selected from a liquid crystal screen, a nixie tube or other components, and the positions can be distributed on the upper part, the lower part or the right part of the instrument panel according to habits and requirements;

c) the fault alarm can be in red, orange or other colors according to the habit and the requirement, and is distributed on the dial.

d) The serial number and name of the pressure gauge can be marked on the upper part, the lower part, the left part or the right part of the dial scale, or fixed on the rear cover of the pressure gauge in a label way;

e) the pressure interface adopts a national standard or European and American meter connector form according to requirements;

f) the type of the electric connector can be selected according to requirements, and the position of the electric connector can be designed on the circumferential surface of the pressure gauge side or the rear cover;

fig. 2 shows an example of a dial of the electrical compound pressure gauge of this example.

2) Structural design

The pressure gauge structural part comprises a pressure pipeline, a shell, a dial, glass and a fastener. The pressure pipeline and the fastening piece can be made of austenitic stainless steel with high strength and good machining and weather resistance; the shell and the dial are made of aluminum alloy materials with high strength, good weather resistance and light weight; the glass can be made of high silicate glass material or polycarbonate material. The metal parts are subjected to heat treatment and surface treatment according to the purpose.

3) Sensor design

The electric sensor is a high-precision 0.3% sensor with corrosion resistance, high performance and wide temperature range, can meet the precision design requirement of 0.5%, and can adopt a goods shelf product meeting the requirement, the schematic block diagram of the electric sensor is shown in figure 3.

The utility model discloses a combined type manometer uses electric formula sensor to gather the pressure of introducing and carry out temperature compensation, and output signal gives microprocessor. The microprocessor generates corresponding pressure values after filtering and resolving, controls the stepping motor to drive the gear set, the pointer to match with the dial for indicating and digitally displaying the current pressure value, and can output proportional current or voltage signals to external equipment. 1) high precision; 2) the influence of high and low temperature is small; 3) Pointer and number double display, and good human-computer efficiency; 4) the environmental suitability is good; 5) the power-on self-checking function is achieved; 6) the system has the advantages of electric signal output, and capability of monitoring the state of the system equipment, thereby greatly reducing the working intensity of operators.

Claims (7)

1. The electric composite pressure gauge is characterized by comprising an electric sensor and a microprocessor, wherein the electric sensor senses a pressure source and performs temperature compensation, the microprocessor is used for controlling a digital display module to display a current pressure value according to a sensing value of the electric sensor, and a pointer is controlled by a stepping motor driving a gear set to indicate the current pressure value on a dial.

2. The electro-pneumatic combination pressure gauge according to claim 1, wherein said gear set is connected to a potentiometer for feeding back a pointer rotation angle signal to said microprocessor for monitoring the pointer indication status.

3. The electrical combination pressure gauge according to claim 1, wherein the electrical combination pressure gauge further comprises a fault warning light connected to the microprocessor for power-on self-test and fault warning of the electrical combination pressure gauge.

4. The electrical combination pressure gauge according to claim 3, wherein the malfunction warning lamp is provided on the dial in red or orange color.

5. The electrical combination pressure gauge of claim 1, wherein the electrical combination pressure gauge further comprises an electrical connector for feeding back a pressure acquisition signal and the operating status of the electrical combination pressure gauge to a back-end acquisition monitoring device.

6. The electrical compound pressure gauge according to claim 1, wherein color bands of different colors are printed or sprayed on the outer periphery of the dial scale.

7. The electrical compound pressure gauge according to claim 1, wherein the digital display module is a liquid crystal display or a nixie tube.

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