CN201909805U

CN201909805U - Digital universal meter

Info

Publication number: CN201909805U
Application number: CN2010206637561U
Authority: CN
Inventors: 王悦; 王铁军; 李维森
Original assignee: Rigol Technologies Inc
Current assignee: Rigol Technologies Inc
Priority date: 2010-12-16
Filing date: 2010-12-16
Publication date: 2011-07-27
Anticipated expiration: 2020-12-16

Abstract

The utility model discloses a digital universal meter, which comprises a data acquisition unit, a processor unit, a control unit and an execution unit, wherein the data acquisition unit, the processor unit, the control unit and the execution unit are connected sequentially; the data acquisition unit is used for acquiring a tested signal; the tested signal is processed through the processor unit to be changed into a digital signal; the digital signal is transmitted to the control unit; the control unit sends a corresponding control command to control the execution unit for carrying out operation; the execution unit comprises a meter dial display device, a buzzer control device and a buzzer; and the meter dial display device, the buzzer control device and the buzzer are connected sequentially. In the digital universal meter, the buzzer has a wider selection range; and a client can select whether to use the buzzer inside and outside a threshold value range of the digital universal meter as required so that different desires of users are met.

Description

A kind of digital multimeter

Technical field

The utility model relates to a kind of digital multimeter.

Background technology

At present, in the instrument and meter that control system adopts, the critical value that an effect can produce minimum and/or mxm. will be set sometimes, be threshold value so that realize the control purpose, digital multimeter is one of instrument of using always.

In digital multimeter, basically all types of digital multimeter all have PASS/FAIL measurement function (perhaps claiming limit value to measure or the like), its basic implementation is: the simulating signal of input is become discrete digital signal through after the AD converter, digital multimeter is provided with the measured value that these discrete digital signal is converted to a correspondence according to current measurement, then higher limit and the lower limit that configures in this measured value and the digital multimeter compared, if measured value is in limits, then multimeter shows " PASS ", not buzzing of hummer; Be " failure " if measured value greater than higher limit, detects, multimeter shows " HI FAIL ", simultaneously the hummer buzzing; If measured value is less than lower limit, the same detection is " failure ", and multimeter shows " LO FAIL ", simultaneously the hummer buzzing.In the prior art, the higher limit that is used for comparison and lower limit are arbitrarily to be provided with can establishing in the scope by the user according to different measurement functions, but the buzzing control for hummer corresponding in the test result can not be provided with, promptly can only be buzzing in FAIL, and not buzzing in PASS.

Though this default setting of hummer can satisfy 95% above client's user demand substantially, but the measuring object of working as the client is more special, perhaps during the buzzing setting of hummer and user expectation inconsistent, the PASS/FAIL measurement function just becomes concerning this user and is difficult to use or unavailable.

Summary of the invention

The utility model purpose is exactly the shortcoming that will overcome prior art, and provide a kind of all energy buzzings of hummer under the PASS/FAIL measurement function, and can carry out the different digital multimeter that are provided with by the hummer buzzing that the user measures PASS/FAIL according to actual needs.

For achieving the above object, the utility model by the following technical solutions: it comprises data acquisition unit, processor unit, control module and performance element, and described data acquisition unit, processor unit, control module and performance element are connected successively; Data acquisition unit is used for gathering measured signal, handles by processor unit to become digital signal, and digital data transmission is to described control module, and control module sends corresponding control command and comes control execution unit to move; Described performance element comprises dial plate display device, hummer control device and hummer, and described dial plate display device, hummer control device are connected successively with hummer.

Further, described data acquisition unit, processor unit, control module and performance element are connected by data line successively; Described dial plate display device, hummer control device are connected by data line successively with hummer.

Principle of work of the present utility model is: after data acquisition unit is gathered the simulating signal of tested input, be input to processor unit, in processor unit, carry out the AD analog to digital conversion: the analog signal conversion of input is become the manageable digital signal of digital circuit, and the digital signal that the AD analog to digital conversion is intact is converted to corresponding measured value; Corresponding measured value is input to control module, judges in control module whether measured value exceeds pre-set threshold, i.e. higher limit or lower limit; According to the difference of measured value, the control module control execution unit is carried out following actions:

If the A measured value exceeds pre-set threshold, then the measurement result of PASS/FAIL is " failure " and show on the dial plate display device, 1) if measured value greater than higher limit, the dial plate display device shows " HI FAIL ", and selects whether to start hummer by the hummer control device; 2) if measured value less than lower limit, the dial plate display device then shows " LO FAIL ", and selects whether to start hummer by the hummer control device;

If the B measured value between pre-set threshold, then the measurement result of PASS/FAIL be " by ", show above the dial plate display device " PASS ", and select whether to start hummer by the hummer control device;

The utility model good effect compared with prior art is:

1, the hummer that is provided with in the scheme has wider range of choice, and the client can be as required all can select whether buzzing of hummer in that the digital multimeter threshold range is inside and outside, to satisfy the difference expectation of different user.

2, having solved digital multimeter in the past and can not be provided with for the buzzing control of hummer corresponding in the test result, promptly can only be buzzing in FAIL, and in PASS the problem of not buzzing.

Description of drawings

Fig. 1 is a structure calcspar of the present utility model.

Fig. 2 the utility model test philosophy process block diagram.

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model.

As shown in Figure 1, 2, a kind of digital multimeter, it comprises data acquisition unit 1, processor unit 2, control module 3 and performance element 4, described data acquisition unit 1, processor unit 2, control module 3 and performance element 4 are connected by data line successively; Data acquisition unit 1 is used for gathering measured signal, handles by processor unit 2 to become digital signal, and digital data transmission is to described control module 3, and control module 3 sends corresponding control command and comes control execution unit 4 to move; Described performance element 4 comprises dial plate display device 41, hummer control device 42 and hummer 43, and described dial plate display device 41, hummer control device 42 and hummer 43 are connected by data line successively.

In use, after data acquisition unit 1 is gathered the simulating signal of tested input, be input to processor unit 2, in processor unit 2, carry out the AD analog to digital conversion: the analog signal conversion of input is become the manageable digital signal of digital circuit, and the digital signal that the AD analog to digital conversion is intact is converted to corresponding measured value; Corresponding measured value is input to control module 3, judges in control module 3 whether measured value exceeds pre-set threshold, i.e. higher limit or lower limit; According to the difference of measured value, control module 3 control execution unit 4 are carried out following actions:

If the A measured value exceeds pre-set threshold, then the measurement result of PASS/FAIL is " failure " and demonstration on dial plate display device 41,1) if measured value greater than higher limit, dial plate display device 41 shows " HI FAIL ", and selects whether to start hummer 43 by hummer control device 42; 2) if measured value less than lower limit, 41 demonstrations of dial plate display device " LO FAIL ", and select whether to start hummer 43 by hummer control device 42.

If the B measured value between pre-set threshold, then the measurement result of PASS/FAIL be " by ", show above the dial plate display device 41 " PASS ", and select whether to start hummer 43 by hummer control device 42.

In sum, embodiment described in the utility model only provides a kind of embodiment of the best, technology contents of the present utility model and technical characterstic disclose as above, yet the personage who is familiar with this technology still may be based on content that the utility model disclosed and done various replacement and the modifications that do not deviate from creation spirit of the present invention; Therefore, protection domain of the present utility model is not limited to the technology contents that embodiment discloses, so all equivalences of doing according to shape of the present utility model, structure and principle change, all is encompassed in the protection domain of the present utility model.

Claims

1. digital multimeter, it is characterized in that: it comprises data acquisition unit, processor unit, control module and performance element, described data acquisition unit, processor unit, control module and performance element are connected successively; Data acquisition unit is used for gathering measured signal, handles by processor unit to become digital signal, and digital data transmission is to described control module, and control module sends corresponding control command and comes control execution unit to move; Described performance element comprises dial plate display device, hummer control device and hummer, and described dial plate display device, hummer control device are connected successively with hummer.

2. a kind of digital multimeter according to claim 1 is characterized in that: described data acquisition unit, processor unit, control module and performance element are connected by data line successively; Described dial plate display device, hummer control device are connected by data line successively with hummer.